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Though the phylogenetic signal of loci on sex chromosomes can differ from those on autosomes, chromosomal-level genome assemblies for non-vertebrates are still relatively scarce and conservation of chromosomal gene content across deep phylogenetic scales has therefore remained largely unexplored. We here assemble a uniquely large and diverse set of samples (17 Anchored Hybrid Enrichment [AHE], 24 RNA-Seq, and 70 whole-genome sequencing [WGS] samples of variable depth) for the medically important assassin bugs (Reduvioidea). We assess the performance of genes based on multiple features (e.g., nucleotide vs. amino acid, nuclear vs. mitochondrial, and autosomal vs. X chromosomal) and employ different methods (concatenation and coalescence analyses) to reconstruct the unresolved phylogeny of this diverse (∼7,000 spp.) and old (>180 MYA) group. Our results show that genes on the X chromosome are more likely to have discordant phylogenies than those on autosomes. We find that the X chromosome conflict is driven by high gene substitution rates that impact accuracy of phylogenetic inference. However, gene tree clustering showed strong conflict even after discounting variable third codon positions. Alternative topologies were not particularly enriched for sex chromosome loci, but spread across the genome. We conclude that binning genes to autosomal or sex chromosomes may result in a more accurate picture of the complex evolutionary history of a clade.

Guapinannus uncus, sp. n. (Figs 4, 7, 9) Holotype. Male. BELIZE: Belize, 17.18988°N 88.49765°W, 55m, no date provided, collector unknown, 1♂ (UCR _ ENT 00090858) (FMNH). Paratypes: BELIZE: Orange Walk: Rio Bravo Cons. Area 3 Well Tran (Near Res. Station), 18.06667°N 88.55°W, 10m, 10 Sep 1995, P. W. Kovarik, 1♂ (UCR _ ENT 00094283) (UCR). Etymology: Named for the hook-shaped vesica after “uncus” Latin for hook (noun in apposition). Diagnosis: Recognized by the small mid-sized body length (0.67 mm), elongate oval body shape (length to width ratio 3.4) (Fig. 4), and apex of vesica hook-shaped (Fig. 7). Description: Male: Total body length 1.19 mm; length from posterior margin of pronotum to posterior wing margin 0.97 mm; greatest width across pronotum 0.27 mm; greatest width across forewings 0.35 mm. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars indistinct. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum small, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip pointed. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc slightly wider than other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 trapezoidal; cub almost reaching wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, surpassing right pygophore margin, thick at midpoint, with bottle opener-shaped apex, close to apex rounded; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, broad throughout, basal process broad; left paramere straight, tapering, basal process broad. Female: Unknown. Collecting method and habitat: Collected using flight intercept trap.

Guapinannus anaticulus, sp. n. (Figs 2, 7, 9) Holotype. Male. GUATEMALA: San Marcos: Bojonal Road, 14.94786°N 91.8837°W, 1618 m, 04 Jun 2015, R. Anderson, 1♂ (UCR _ ENT 00127123) (UCR). Etymology: Named for the duck head-shaped basal process of the right paramere after “anas” meaning duck in Latin. Diagnosis: Recognized by the mid-sized body length (1.45 mm), oval forewing outline, narrow C+SC (black arrow), rc1 about 3 times as long as wide and slightly wider anteriorly (white arrow), tc more than 3 times as long as wide (Fig. 2), the short, slender, and straight vesica with blunt, expanded tip, and the broad, duck head-shaped basal process of the right paramere (Fig. 7). Description: Male: Total body length 1.45 mm; length from posterior margin of pronotum to posterior wing margin 1.23 mm; greatest width across pronotum 0.63 mm; greatest width across forewings 0.81 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing extremely long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum mediumsized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip pointed. Forewing: With outline oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; Sc+C uniform, relatively narrow; distal process of R pronounced; An1 wing organ on corium strongly inflated, rounded, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 5 times as long as wide; tc more than 3 times as long as wide; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 almost triangular; cub almost reaching wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, surpassing right pygophore margin, thick at midpoint, tapering to blunt, expanded tip, close to apex slightly s-shaped; anophoric ridge with process, process short, with single lobe curved, tip blunt; right paramere curved, tapering, basal process duck head-shaped; left paramere straight, tapering, basal process broad. Female: Unknown. Collecting method and habitat: Collected in cloud forest litter using sifting leaf litter., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on pages 266-267, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus Wygodzinsky, 1951 (Figs 1–9) Type species: Guapinannus bierigi Wygodzinsky, 1951 Diagnosis: Recognized among Schizopteridae by the relatively small eyes (Fig. 5C, D), four-segmented labium (Fig. 1A), flat and wide forewings (Figs 1–4), unique forewing venation with long fracture in the costal margin, long rc1, rc, and tc cells (Figs 1B, 2, 6A), C+S, with An1/2 claval process except G. dispar sp. n. (Figs 2, 6A, D), better developed in males than in females (Fig 1B), males with wing organ associated with An1 on corium adjacent to the claval process (Figs 2–4, 6A, D), 2-2-3 tarsal formula in both sexes, male genitalia simple (Fig. 7) and female with well-developed ovipositor (Figs 1C, 8). Re-description: Male: Ovoid (greatest length to width ratio 1.57–1.85) to elongate ovoid (length to width ratio 3.4), total body length 0.66–2.06 mm; length from posterior margin of pronotum to posterior wing margin (0.51–1.49 mm). General coloration: uniformly pale or a mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long or short, setae on posterior margin of forewing long or extremely long. Structure: Head: Eye ranging from small (less than one quarter head height) to relatively large (almost half as high as head) (Fig. 5C, D); ocellus adjacent to eye (Fig. 5D), at 11 o’clock position seen in lateral view and about twice the size of one ommatidium; four-segmented labium with segments 1, 2 and 3 of similar length and 4 about 2.5–3 times as long as any other segment (Fig. 1A); muscle scars present on the frons and vertex present (Figs 1A, 5C). Thorax: Collar in dorsal view narrow (Fig. 5C); proepisternal lobe inflated (Fig. 5D); separation of anterior and posterior lobes (dorsal view) marked by weak depression (Fig. 5C); anterior pronotal lobe with muscle scars, margin concave or straight; posterior margin slightly concave to almost straight; pits on pronotum ranging from small to large, evenly distributed or grouped (Fig. 1A); scutellum in dorsal view abruptly or gradually narrowed to tip, tip pointed, rounded, or slightly inflated (Figs 2–4). Forewing: With outline elongate oval or broad anteriorly; with (G. dispar, sp. n., Fig. 2) or without (all other species) distinct honey-comb pattern; membrane (cub, dc1, rc2–3 and areas distal to these cells) contributing about one third or less to forewing length; posterior distal margin rounded or square; clavus twice as long as wide; vein-tracing areoles along margins of a combination of scc, rc1, rc1, rc2, and tc on proximal part of wing absent or present (Fig. 6A, C); C+Sc narrow (Fig. 2, G. anaticulus, sp. n.), fairly broad (Fig. 2, G. clava, sp. n.), broad (Fig. 2, G. falcis, sp. n.), or very broad (Fig. 3, G. lutuosus, sp. n.), either of uniform width (Fig. 2, G. anaticulus, sp. n.) or wider at widest part of wing (Fig. 2, G. auriculu s, sp. n.); R flattened in distal part (black arrow in Fig. 1B); distal process of R pronounced (white arrow in Fig. 1B) or weakly developed; An1/2 claval process well developed in males (except G. tenuis, sp. n.), overlapping base of An1 wing organ, apex acute and in lateral view pointing dorsad (Figs 2–4, 6A, D); An1 wing organ on corium strongly inflated in all males, with or without (e.g., Fig. 4, G. tergus, sp. n.) notch articulating with claval process, wing organ rounded, elongate, or acute, with or without median notch; scc about 1.5 times longer than wide (Fig. 6A) (except ~2 times longer than wide in G. castigatus, sp. n.); scc undivided except in G. dispar, sp. n. (Fig. 2); rc1 about 3 times as long as wide except in G. dispar, sp. n., ranging from parallel-sided to slightly or much wider anteriorly; rc about 4 or 5 times as long as wide; tc 3 times or more than 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins (e.g., Fig. 2, G. artus, sp. n.) or thicker (e.g., Fig. 2, G. falcis, sp. n.); distal margin of rc1, rc, and tc cells double s-shaped (Fig. 2, G. anaticulus, sp. n.), s-shaped (Fig. 1, G. bierigi), or angular s-shaped (Fig. 2, G. dispar, sp. n.); rc2–3 almost triangular (e.g., Fig. 2, G. anaticulus, sp. n.), trapezoidal (e.g., Fig. 2, G. castigatus, sp. n.), or rectangular (Fig. 2, G. dispar, sp. n.); cub oval, almost reaching wing margin or distant form wing margin (except elongate in G. dispar; Fig. 2); dc1 with basal portion fairly narrow and elongate (Fig. 2, G. anaticulus, sp. n.) or relatively wide and short (Fig. 2, G. auriculu s, sp. n.); M beyond Cu short. Legs: males and females with tarsal formula 2-2-3, with claws long except short in G dispar, sp. n. Genitalia (Fig. 7): Pygophore without lobe on right side (Fig. 7, G. anaticulus, sp. n.), with small (Fig. 7, G. artus, sp. n.) or large lobe (Fig. 7, G. auriculus, sp. n.), or with slightly extended right margin (Fig. 7, G. castigatus, sp. n.). Vesica about one half loop (e.g., Fig. 7, G. castigatus, sp. n.), between half and one loop (e.g., Fig. 7, G. anaticulus, sp. n.), or one loop (e.g., Fig. 7, G. plurilobus, sp. n.), either not reaching right pygophore margin or surpassing margin, at midpoint thick (e.g., Fig. 7, G. graziae, sp. n.), very thick (e.g., Fig. 7, G. robustus, sp. n.), or more slender (e.g., Fig. 7, G. falcis, sp. n.), tapering to blunt or acute tip, tip itself blunt, bottle-opener shaped (e.g., Fig. 7, G. uncus, sp. n.), slightly s-shaped (e.g., Fig. 7, G. falcis, sp. n.), rounded (e.g., Fig. 7, G. artus, sp. n.), or fairly straight (e.g., Fig. 7, G. tatumbia, sp. n.). Anophoric ridge with process present (e.g., Fig. 7, G. artus, sp. n.) or absent (Fig. 7, G. castigatus, sp. n.), process short or long, with single lobe curved or relatively straight, or with multiple lobes, tip pointed, blunt, or combination of pointed and blunt. Right paramere curved or straight, tapering towards apex or broad throughout; basal process of paramere broad, narrow, thumb-shaped, or duck head-shaped. Left paramere straight or curved, tapering towards apex or broad throughout, basal process broad or narrow. Female: As male, but with less well developed An1/2 claval process and without An1 wing organ on corium (Fig. 1B). Genitalia: with well-developed ovipositor (Figs 1C, 8). Reservoir of spermatheca kidney-shaped with short spermathecal duct (Fig. 8). Distribution. Species of Guapinannus are documented from Central and South America, ranging from Veracruz in Mexico to the southern part of Brazil. The greatest species diversity is found in Central America and the northern areas of South America. Specimens have been collected in tropical wet or moist forest, including cloud forest and mixed hardwood forest, from elevation ranging from 5 meters above sea level in Panama to more than 200 meters in Chiapas, Mexico. Collecting method. The majority of specimens for which collection method was recorded were collected using leaf litter sifting and Berlese and Winkler extraction methods. A small number of specimens are derived from Malaise and flight intercept traps. Discussion. The forewing shape, structure with distinct claval suture, and venation set apart Guapinannus from all other genera of Schizopteridae. While Humpatanannus and related genera have not been included in phylogenetic analyses, genitalic features are strikingly different in the two groups, and they are unlikely to be close relatives. The non-genitalic morphology of species of Guapinannus is fairly uniform. Most species are mid-sized and ovoid with some variation, with only few species being distinctly smaller or bigger or markedly elongated ovoid. Some forewing venation features are fairly distinctive and useful as diagnostic characters at the species level, among them the width of the C+Sc and the relative proportion of certain cells. As in many other genera of Schizopteridae, the bulk of diagnostic features is derived from male genitalic structures, in particular the length, curvature, and tip shape of the vesica, shape of the anophoric process, where present, and shape of the pygophore that is expanded into a distinct lobe on the right side in some species. We described as new two species for which only female specimens are known (G. dispar, sp. n. and G. minutus, sp. n.). Both are distinctive based on non-genitalic morphology and G. dispar, sp. n. in addition is geographically isolated from all other known species of Guapinannus. As part of this study we discovered a so far undocumented structure on the forewings that is restricted to males that we interpret as a novel male-specific wing organ. This wing organ is located on the posterior margin of the corium, associated with An1, consist of a strongly inflated semicircular or elongate area and in most species features a median notch. SEM observation of this wing organ in one species (Fig. 6D) shows a tuft of hairlike structures that may represent a trichome. Based on our observations, males of all species of Guapinannus possess this wing organ. Among closely related taxa (based on Knyshov et al., 2020), Caucanannus also have a male-specific wing organ, although in a different position on the forewing (Weirauch et al., 2020), while wing organs have so far not been documented in Luachimonannus and Kokeshia., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on pages 263-265, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718, {"references":["Wygodzinsky, P. (1951) Descripcion de generos y especies nuevos de la familia Cryptostemmatidae (Hemiptera). Revista Brasileira de Biologia, 11, 259 - 270.","Knyshov, A., Weirauch, C. & Hoey-Chamberlain, R. (2020) Phylogenetic relationships and revised classification of the true bug infraorder Dipsocoromorpha (Insecta: Hemiptera: Heteroptera), Cladistics. [early view] https: // doi. org / 10.1111 / cla. 12435","Weirauch, C, Hoey-Chamberlain, R. & Knyshov, A. (2020) Four new genera of Schizopteridae (Hemiptera: Heteroptera) from the Afrotropical and Neotropical regions. Zootaxa, 4768 (1), 95 - 111. https: // doi. org / 10.11646 / zootaxa. 4768.1.6"]}

Guapinannus sinuosus, sp. n. (Figs 3, 7, 9) Holotype. Male. MEXICO: Chiapas: Palenque, 15.63333°N 92.65°W, 1640m, 02 Jul 1983 – 30 Jul 1983, S. B. Peck, J. Kukalova-Peck, R. S. Anderson, 1♂ (UCR _ ENT 00102050) (FMNH). Paratypes: MEXICO: Chiapas: El Bosque (6.6 mi SW), 17.01667°N 92.78333°W, 1463 m, 29 Aug 1973, A. F. Newton, 7♀ (UCR _ ENT 00101241, UCR_ENT 00102051-UCR_ENT 00102053) (FMNH). Playón de la Gloria, 16.16028°N 90.90139°W, 160 m, 26 Jun 2008, collector unknown, 1♂ (UCR _ ENT 00120069) (MTEC). Etymology: Named for the s-shaped vesica after “sinuosus” Latin for bending. Diagnosis: Recognized by the mid-sized body length (1.49 mm), C+Sc margin broad anteriorly and more slender posteriorly, distinctly double s-shaped margin of rc1, rc, tc cells (black arrow) (Fig. 3), and relatively tick and s-shaped vesica (Fig. 7). Description: Male: Total body length 1.49 mm; length from posterior margin of pronotum to posterior wing margin 0.9 mm; greatest width across pronotum 0.54 mm. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum small, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip pointed. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc uniformly broad; distal process of R weakly developed; An1 wing organ on corium strongly inflated, without notch articulating with claval process, rounded, without median notch; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 5 times as long as wide; tc about 3 times as long as wide; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 almost triangular; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to tip slightly s-shaped; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, tapering, basal process broad; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method and habitat: Collected using Berlese extraction, flight intercept trap, and sifting leaf litter in closed forest, cloud forest with pines, mature wet forest, and rainforest.

Guapinannus tatumbia, sp. n. (Figs 4, 7, 9) Holotype. Male. HONDURAS: Francisco Morazan: Tatumbia Montaña del Aguacate, 14°N 87.08333°W, 1425m, 14 Mar 1996, R. Cave, 1♂ (UCR _ ENT 00078556) (EAPZ). Paratypes: HONDURAS: Francisco Morazan: Tatumbia Montaña del Aguacate, 14°N 87.08333°W, 1425m, 14 Mar 1996, R. Cave, 5♂ (UCR _ ENT 00078555, UCR_ENT 00078557-UCR_ENT 00078560), 5♀ (UCR _ ENT 00078561 -UCR_ENT 00078565) (EAPZ). Olancho: La Union Parq Nac La Maralla, 15.07949°N 86.76175°W, 1060m, 14 Sep 1994, R. Cordero, 1♀ (UCR _ ENT 00078566) (EAPZ). Etymology: Named for the type locality “Tatumbia Montana” in Honduras (noun in apposition). Diagnosis: Recognized by the mid-sized body length (1.51 mm), elongate oval outline of forewings, inflated tip of scutellum (black arrow) (Fig. 4), vesica relatively thick and straight with acute tip, not reaching pygophore margin, and without anophoric process (Fig. 7). Description: Male: Total body length 1.51 mm; length from posterior margin of pronotum to posterior wing margin 1.27 mm; greatest width across pronotum 0.62 mm; greatest width across forewings 0.88 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing extremely long. Structure: Head: Eye about one third as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum small, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 trapezoidal; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex fairly straight; anophoric ridge without process; right paramere curved, broad throughout, basal process broad; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method and habitat: Unknown.

Guapinannus auriculus, sp. n. (Figs 2, 7, 9) Holotype. Male. MEXICO: Veracruz: San Andres Tuxtla Co.: 18.52303°N 95.15453°W, 1109 m, 05 Jun 2016, Manuel Barrios, 4♂ (UCR _ ENT 00125965) (UCR). Paratypes: MEXICO: Veracruz: hills above Ruiz Cortinez, 18.5304°N 95.14127°W, 1239 m, 07 Jun 2016, R. S. Anderson, 1#f (UCR _ ENT 00126156) (UCR). San Andres Tuxtla Co.: 18.52303°N 95.15453°W, 1109 m, 05 Jun 2016, Manuel Barrios, 8♂ (UCR _ ENT 00125966, UCR_ENT 00128211, UCR_ENT 00128214), 13♀ (UCR _ ENT 00125967, UCR_ENT 00126150) (UCR). Etymology: Named for the large lobe on the right side of the pygophore after “auricula” Latin for lobe. Diagnosis: Recognized by the mid-sized body length (1.23 mm), rc about 4 times as long as wide (white star), tc less than 3 times as long as wide (Fig. 2), large lateral lobe on right side of pygophore (black star), slender vesica tapering into acute tip, and anophoric process very short, curved, and pointed (black arrow) (Fig. 7). Similar to G. artus, sp. n. that is also known from Veracruz in Mexico but distinguished by the characters listed in the diagnosis. Additionally, G. auriculus, sp. n. and G. castigatus, sp. n. have a similar vesica, but differ in rc1 shape. Description: Male: Total body length 1.23 mm; length from posterior margin of pronotum to posterior wing margin 0.9 mm; greatest width across pronotum 0.55 mm; greatest width across forewings 0.75 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing extremely long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum large, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, rounded, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 4 times as long as wide; tc 3 less than 3 times as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 almost triangular; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore with large lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, tapering, basal process narrow; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method and habitat: Collected using sifting leaf litter, Winkler extraction in broadleaf forest and tree ferns., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on page 268, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus tenuis, sp. n. (Figs 4, 7, 9) Holotype. Male. COSTA RICA: Unknown locality, no date provided, collector unknown, 1♂ (UCR _ ENT 00014617) (INBIO). Etymology: Named for the slender vesica after “tenuis” Latin for slender. Diagnosis: Recognized by the large body length (2.06 mm), narrow C+Sc (black arrow), distal margin of rc1, rc, and tc cells distinctly double s-shaped (white arrow) (Fig. 4), relatively long s-shaped vesica, and absence of anophoric process (Fig. 7). Description: Male: Total body length 2.06 mm; length from posterior margin of pronotum to posterior wing margin 1.49 mm; greatest width across pronotum 0.69 mm; wing missing. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye about one third as high as head; muscle scars large. Thorax: Anterior pronotal margin straight, posterior margin slightly concave; pits on pronotum large, in distinct clusters; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc uniformly narrow; distal process of R weakly developed; An1 wing organ on corium weakly developed; rc1 about 3 times as long as wide, much wider anteriorly; rc about 5 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells s-shaped; rc2- 3 almost triangular; cub removed from wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex slightly s-shaped; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere straight, tapering, basal process broad; left paramere straight, tapering, basal process broad. Female: Unknown. Collecting method and habitat: Unknown., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on pages 278-280, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus robustus, sp. n. (Figs 3, 7, 9) Holotype. Male. MEXICO: Chiapas: RSV A El Triunfo, Est. El Triunfo, 16.20286°N 91.86044°W, 1950 m, 08 Aug 1996 – 11 Aug 1996, A. R. Gillogly, 1♂ (UCR _ ENT 00094282) (UCR). Etymology: Named for the extremely thick vesica after “robustus” Latin for robust. Diagnosis: Recognized by the mid-sized body length (1.49 mm), small vein-tracing areoles distributed along scc, rc and rc1 (black arrow) (Fig. 3), slight extensions of the right pygophore margin (black star), and very thick vesica with blunt tip (Fig. 7). Description: Male: Total body length 1.49 mm; length from posterior margin of pronotum to posterior wing margin 1.1 mm; greatest width across pronotum 0.28 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing extremely long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip rounded. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles small, distributed along scc, rc and rc1; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, triangular, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 5 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 trapezoidal; cub almost reaching wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia (Fig. 7): Pygophore with slightly extended right margin; vesica with about half loop, not reaching right pygophore margin, very thick at midpoint, tapering to blunt tip, close to apex slightly s-shaped; anophoric ridge with process, process short, with single lobe relatively straight, tip pointed; right paramere curved, broad throughout, basal process broad; left paramere straight, tapering, basal process narrow. Female: Unknown. Collecting method: Collected using a flight intercept trap.

Guapinannus tergus, sp. n. (Figs 4, 7, 9) Holotype. Male. ECUADOR: Pastaza: 25 km N Puyo, 1.2855°S 78.02291°W, 1000 m, 13 Jul 1976, S. B. Peck, 1♂ (UCR _ ENT 00090642) (FMNH). Paratypes: ECUADOR: Pastaza: Pastaza, 1.43583°S 78.00194°W, 972m, 13 Jul 1976, S. B. Peck, 4♂ (UCR _ ENT 00090643 -UCR_ENT 00090646) (FMNH). Etymology: Named for the long ridge-like process on the anophoric after “tergus” Latin for ridge (noun in apposition). Diagnosis: Recognized by the very small body length (0.67 mm), small vein-tracing areoles along rc and rc1 (black arrow) (Fig. 4), almost full-loop, circular vesica, and long anophoric process with curved single tip (black arrow) (Fig. 7). Description: Male: Total body length 0.67 mm; length from posterior margin of pronotum to posterior wing margin 0.52 mm; greatest width across pronotum 0.28 mm; greatest width across forewings 0.42 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip pointed. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles small, distributed along rc and rc1; C+Sc fairly narrow, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, rounded, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 trapezoidal; cub almost reaching wing margin; dc1 horse head-shaped. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process long, with single lobe curved, tip pointed; right paramere curved, broad throughout, basal process narrow; left paramere straight, broad throughout, basal process narrow. Female: Unknown. Collecting method and habitat: Collected using Berlese extraction in cloud forest litter., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on page 280, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus sinuosus, sp. n. (Figs 3, 7, 9) Holotype. Male. MEXICO: Chiapas: Palenque, 15.63333°N 92.65°W, 1640m, 02 Jul 1983 – 30 Jul 1983, S. B. Peck, J. Kukalova-Peck, R. S. Anderson, 1♂ (UCR _ ENT 00102050) (FMNH). Paratypes: MEXICO: Chiapas: El Bosque (6.6 mi SW), 17.01667°N 92.78333°W, 1463 m, 29 Aug 1973, A. F. Newton, 7♀ (UCR _ ENT 00101241, UCR_ENT 00102051-UCR_ENT 00102053) (FMNH). Playón de la Gloria, 16.16028°N 90.90139°W, 160 m, 26 Jun 2008, collector unknown, 1♂ (UCR _ ENT 00120069) (MTEC). Etymology: Named for the s-shaped vesica after “sinuosus” Latin for bending. Diagnosis: Recognized by the mid-sized body length (1.49 mm), C+Sc margin broad anteriorly and more slender posteriorly, distinctly double s-shaped margin of rc1, rc, tc cells (black arrow) (Fig. 3), and relatively tick and s-shaped vesica (Fig. 7). Description: Male: Total body length 1.49 mm; length from posterior margin of pronotum to posterior wing margin 0.9 mm; greatest width across pronotum 0.54 mm. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum small, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip pointed. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc uniformly broad; distal process of R weakly developed; An1 wing organ on corium strongly inflated, without notch articulating with claval process, rounded, without median notch; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 5 times as long as wide; tc about 3 times as long as wide; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 almost triangular; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to tip slightly s-shaped; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, tapering, basal process broad; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method and habitat: Collected using Berlese extraction, flight intercept trap, and sifting leaf litter in closed forest, cloud forest with pines, mature wet forest, and rainforest., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on pages 277-278, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus plurilobus, sp. n. (Figs 3, 7, 9) Holotype. Male. PERU: Amazonas: Pacaya–Samiria National Reserve, 5.2012°S 74.59319°W, 280m, 07 Nov 1980, CI. Vaucher, 1♂ (UCR _ ENT 00089590) (MHNG). Paratypes: PERU: Amazonas: Pacaya–Samiria National Reserve, 5.2012°S 74.59319°W, 280m, 07 Nov 1980, CI. Vaucher, 4♂ (UCR _ ENT 00089589, UCR_ENT 00089591-UCR_ENT 00089593), 5♀ (UCR _ ENT 00089594 - UCR_ENT 00089598) (MHNG). Unknown locality in Peru, no date provided, collector unknown, 1♀ (UCR _ ENT 00089582) (MHNG). Etymology: Named for the multiple lobes on the anophoric process after “pluri” and “lobus” Latin for multiple lobes. Diagnosis: Recognized by the small body length (1.14 mm), relatively short rc1, rc, and tc cells (black star) (Fig. 3), slender vesica with one loop, and multilobed anophoric process, with combination of blunt and acute tips (black arrow) (Fig. 7). Description: Male: Total body length 1.14 mm; length from posterior margin of pronotum to posterior wing margin 0.8 mm; greatest width across pronotum 0.44 mm; greatest width across forewings 0.67 mm. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium weakly inflated, elongate, with median notch; without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc slightly wider than other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 almost triangular; cub almost reaching wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with one loop, not reaching right pygophore margin, relatively slender at midpoint, tapering to blunt tip, close to apex rounded; anophoric ridge with process, process long, with multiple lobes, tip blunt; right paramere curved, broad throughout, basal process broad; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method: Collected using Winkler extraction.

Guapinannus policis, sp. n. (Figs 3, 7, 9) Holotype. Male. COLOMBIA: Cauca: PNN Gorgona, Antigua Laguna, 2.96667°N 78.18333°W, 70 m, 18 Dec 2000 – 03 Jan 2001, H. Torres, 1♂ (UCR _ ENT 00109003) (UCR). Paratype: COLOMBIA: Cauca: PNN Gorgona, Alto el Mirador, 2.96666°N 78.18333°W, 180 m, 06 Oct 2000 – 23 Oct 2000, R. Duque, 1♀ (UCR _ ENT 00115594) (UCR). Etymology: Named for the thumb-shaped basal process of the right paramere after “policis” Latin for thumb. Diagnosis: Recognized by the small body length (1.03 mm), elongate oval forewing outline, short and wide rc, rc1, and tc (black star) (Fig. 3), slender vesica with acute tip, and thumb-shaped basal process of the right paramere (black arrow) (Fig. 7). Description: Male: Total body length 1.03 mm; length from posterior margin of pronotum to posterior wing margin ambiguous 0.7 mm; greatest width across pronotum 0.47 mm; greatest width across forewings 0.63 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars small. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum large, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip pointed. Forewing: With outline broad anteriorly, elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, veintracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch; without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 3 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 trapezoidal; cub almost reaching wing margin; dc1 horse headshaped. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, relatively slender at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, broad throughout, basal process thumb-shaped; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method: Collected using a Malaise Trap.

Guapinannus tenuis, sp. n. (Figs 4, 7, 9) Holotype. Male. COSTA RICA: Unknown locality, no date provided, collector unknown, 1♂ (UCR _ ENT 00014617) (INBIO). Etymology: Named for the slender vesica after “tenuis” Latin for slender. Diagnosis: Recognized by the large body length (2.06 mm), narrow C+Sc (black arrow), distal margin of rc1, rc, and tc cells distinctly double s-shaped (white arrow) (Fig. 4), relatively long s-shaped vesica, and absence of anophoric process (Fig. 7). Description: Male: Total body length 2.06 mm; length from posterior margin of pronotum to posterior wing margin 1.49 mm; greatest width across pronotum 0.69 mm; wing missing. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye about one third as high as head; muscle scars large. Thorax: Anterior pronotal margin straight, posterior margin slightly concave; pits on pronotum large, in distinct clusters; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc uniformly narrow; distal process of R weakly developed; An1 wing organ on corium weakly developed; rc1 about 3 times as long as wide, much wider anteriorly; rc about 5 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells s-shaped; rc2- 3 almost triangular; cub removed from wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex slightly s-shaped; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere straight, tapering, basal process broad; left paramere straight, tapering, basal process broad. Female: Unknown. Collecting method and habitat: Unknown.

Guapinannus falcis, sp. n. (Figs 2, 7, 8, 9) Holotype. Male. COSTA RICA: Heredia: 6 km ENE Vara Blanca, 10.18333°N 84.11667°W, 2000 m, 16 Mar 2002, INBio-OET-ALAS, 1♂ (UCR _ ENT 00014616) (INBIO). Paratypes: COSTA RICA: Alajuela: Upala Co.: Bijagua, San Miguel, Finca Inti-Aura, 10.75778°N 85.00939°W, 300 m, 16 Apr 2011 – 20 May 2011, I. Chacon, 1♂ (UCR _ ENT 00014608) (INBIO). Heredia: Sarapiqui Co.: P.N.B. Carrillo 5 km. E Vara Blanca, 10.17226°N 84.11213°W, 2100 m, 20 Apr 2002, INBio-OET-ALAS, 1♀ (UCR _ ENT 00014611) (INBIO). P.N.B. Carrillo 6 km. ENE Vera Blanca, 10.15°N 83.91667°W, 2000 m, 17 Feb 2002 – 21 Feb 2002, INBio-OET-ALAS, 1♀ (UCR _ ENT 00014612) (INBIO); 10 Mar 2002, INBio-OET-ALAS, 1♀ (UCR _ ENT 00014610), 1♂ (UCR _ ENT 00014613) (INBIO). 6 km ENE Vara Blanca, 10.18333°N 84.11667°W, 2000 m, 16 Mar 2002, INBio-OET-ALAS, 1♀ (UCR _ ENT 00014614) (INBIO); 22 Mar 2002, INBio-OET-ALAS, 4♀ (UCR _ ENT 00014618 -UCR_ENT 00014621) (INBIO). Etymology: Named for sickle shaped vesica after “flax” Latin for sickle. Diagnosis: Recognized by the mid-sized body length (1.56 mm), dense vestiture, part of An1 and Cu forming posterodistal margin of tc more pronounced than other veins (black arrow) (Fig. 2), long, relatively slender vesica, with s-shaped bent proximal of acute tip, and short, curved anophoric process with pointed tip (black arrow) (Fig. 7). Most similar to G. bierigi, sp. n., that is also known from Costa Rica, but distinguished by the much smaller distance of cub from the wing margin compared to G. bierigi, sp. n. Description: Male: Total body length 1.56 mm; length from posterior margin of pronotum to posterior wing margin 1.27 mm; greatest width across pronotum 0.65 mm; greatest width across forewings 0.87 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense, long setae; setae on posterior margin of forewing long. Structure: Head: Eye about one third as high as head; muscle scars not observed. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum large, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip pointed. Forewing: With outline broad anteriorly, elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc uniformly broad; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch; without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 5 times as long as wide; tc more than 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc more pronounced than other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 almost triangular; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, surpassing right pygophore margin, relatively slender at midpoint, tapering to acute tip, close to apex slightly s-shaped; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, broad throughout, basal process broad; left paramere straight, tapering, basal process broad. Female: As in male and generic description. Collecting method and habitat: Collected using Malaise trap in unknown habitat., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on page 272, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus anaticulus, sp. n. (Figs 2, 7, 9) Holotype. Male. GUATEMALA: San Marcos: Bojonal Road, 14.94786°N 91.8837°W, 1618 m, 04 Jun 2015, R. Anderson, 1♂ (UCR _ ENT 00127123) (UCR). Etymology: Named for the duck head-shaped basal process of the right paramere after “anas” meaning duck in Latin. Diagnosis: Recognized by the mid-sized body length (1.45 mm), oval forewing outline, narrow C+SC (black arrow), rc1 about 3 times as long as wide and slightly wider anteriorly (white arrow), tc more than 3 times as long as wide (Fig. 2), the short, slender, and straight vesica with blunt, expanded tip, and the broad, duck head-shaped basal process of the right paramere (Fig. 7). Description: Male: Total body length 1.45 mm; length from posterior margin of pronotum to posterior wing margin 1.23 mm; greatest width across pronotum 0.63 mm; greatest width across forewings 0.81 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing extremely long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum mediumsized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip pointed. Forewing: With outline oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; Sc+C uniform, relatively narrow; distal process of R pronounced; An1 wing organ on corium strongly inflated, rounded, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 5 times as long as wide; tc more than 3 times as long as wide; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 almost triangular; cub almost reaching wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, surpassing right pygophore margin, thick at midpoint, tapering to blunt, expanded tip, close to apex slightly s-shaped; anophoric ridge with process, process short, with single lobe curved, tip blunt; right paramere curved, tapering, basal process duck head-shaped; left paramere straight, tapering, basal process broad. Female: Unknown. Collecting method and habitat: Collected in cloud forest litter using sifting leaf litter.

Guapinannus graziae, sp. n. (Figs 3, 7, 9) Holotype. Male. NICARAGUA: Region Autonoma del Atlantico Sur: 13km WNW Rama, 12.19472°N 84.33667°W, 190 m, 18 Apr 2011, J. T. Longino, 1♂ (UCR _ ENT 00102045) (FMNH). Paratypes: NICARAGUA: Region Autonoma del Atlantico Sur: 13km WNW Rama, 12.19472°N 84.33667°W, 190 m, 18 Apr 2011, J. T. Longino, 3♀ (UCR _ENT 00102046-UCR_ENT 00102048), 1♂ (UCR _ENT 00101103) associated with Carduus occidentalis Nutt. (Asteraceae), 1♂ (UCR _ENT 00102049) (FMNH). Rivas: Matagalpa: RN Cerro Musún, 12.95944°N 85.225°W, 800m, 01 May 2011, collector unknown, 1♂ (UCR _ENT 00101361) (FMNH). Etymology: Named after our dear mentor, colleague, and friend, the grande dame of South American heteropteran systematics, Jocelia Grazia. Diagnosis: Recognized by the small body length (1.16 mm), very broad C+Sc margin (white arrow) (Fig. 3), slightly s-shaped vesica, and short, curved anophoric process (black arrow) (Fig. 7). Description: Male: Total body length 1.16 mm; length from posterior margin of pronotum to posterior wing margin 0.89 mm; greatest width across pronotum 0.56 mm; greatest width across forewings 0.69 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip pointed. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin squarish, veintracing areoles on proximal part of wing absent; C+Sc very broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, elongate, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells s-shaped; rc2–3 trapezoidal; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex slightly s-shaped; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, tapering, basal process narrow; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method and habitat: Collected using Winkler extraction in second growth forest and tropical wet forest., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on pages 272-273, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus policis, sp. n. (Figs 3, 7, 9) Holotype. Male. COLOMBIA: Cauca: PNN Gorgona, Antigua Laguna, 2.96667°N 78.18333°W, 70 m, 18 Dec 2000 – 03 Jan 2001, H. Torres, 1♂ (UCR _ ENT 00109003) (UCR). Paratype: COLOMBIA: Cauca: PNN Gorgona, Alto el Mirador, 2.96666°N 78.18333°W, 180 m, 06 Oct 2000 – 23 Oct 2000, R. Duque, 1♀ (UCR _ ENT 00115594) (UCR). Etymology: Named for the thumb-shaped basal process of the right paramere after “policis” Latin for thumb. Diagnosis: Recognized by the small body length (1.03 mm), elongate oval forewing outline, short and wide rc, rc1, and tc (black star) (Fig. 3), slender vesica with acute tip, and thumb-shaped basal process of the right paramere (black arrow) (Fig. 7). Description: Male: Total body length 1.03 mm; length from posterior margin of pronotum to posterior wing margin ambiguous 0.7 mm; greatest width across pronotum 0.47 mm; greatest width across forewings 0.63 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars small. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum large, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip pointed. Forewing: With outline broad anteriorly, elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, veintracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch; without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 3 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 trapezoidal; cub almost reaching wing margin; dc1 horse headshaped. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, relatively slender at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, broad throughout, basal process thumb-shaped; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method: Collected using a Malaise Trap., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on page 275, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus artus, sp. n. (Figs 2, 7, 9) Holotype. Male. MEXICO: Veracruz: Road to Ruiz Cortinez, 18.5229°N 95.15441°W, 1114 m, 05 Jun 2016, R. S. Anderson, 1♂ (UCR _ ENT 00125959) (UCR). Paratypes: MEXICO: Veracruz: Road to Ruiz Cortinez, 18.5229°N 95.15441°W, 1114 m, 05 Jun 2016, R. S. Anderson, 1♀ (UCR _ ENT 00125960) (UCR). Road to Ruiz Cortinez, 18.52241°N 95.14957°W, 1170 m, 04 Jun 2016, R. S. Anderson, 1♀ (UCR _ ENT 00125961) (UCR). San Andres Tuxtla Co.: 18.52303°N 95.15453°W, 1109 m, 05 Jun 2016, Manuel Barrios, 2♂ (UCR _ ENT 00128215, UCR_ENT 00128216) (UCR). Etymology: Named for narrow rc cell of the forewing in dorsal view after “artus” Latin for narrow. Diagnosis: Recognized by the mid-sized body length (1.29 mm), elongate oval forewing outline, rc about 5 times as long as wide (black star), tc about 3 times as long as wide (Fig. 2), lateral lobe on right side of pygophore (black star), slender vesica, and short, broad anophoric process with blunt tip (black arrow) (Fig. 7). Similar to G. auriculus, sp. n. that is also known from Veracruz in Mexico but distinguished by the characters listed in the diagnosis. Description: Male: Total body length 1.29 mm, length from posterior margin of pronotum to posterior wing margin 1.04 mm; greatest width across pronotum 0.54 mm; greatest width across forewings 0.75 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum large, in distinct clusters; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: with outline broad anteriorly, elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, veintracing areoles on proximal part of wing absent; C+Sc wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, rounded, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 5 times as long as wide; tc 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 almost triangular; cub almost reaching wing margin; dc1 horse headshaped. Legs: Claws long. Genitalia (Fig. 7): Pygophore with lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, relatively slender at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process short, broad, with single lobe curved, tip blunt; right paramere curved, tapering, basal process narrow; left paramere, tapering, basal process narrow. Female: As in male and generic description. Collecting method and habitat: Collected using sifting leaf litter, Winkler extraction in mixed hardwood forest.

Guapinannus tatumbia, sp. n. (Figs 4, 7, 9) Holotype. Male. HONDURAS: Francisco Morazan: Tatumbia Montaña del Aguacate, 14°N 87.08333°W, 1425m, 14 Mar 1996, R. Cave, 1♂ (UCR _ ENT 00078556) (EAPZ). Paratypes: HONDURAS: Francisco Morazan: Tatumbia Montaña del Aguacate, 14°N 87.08333°W, 1425m, 14 Mar 1996, R. Cave, 5♂ (UCR _ ENT 00078555, UCR_ENT 00078557-UCR_ENT 00078560), 5♀ (UCR _ ENT 00078561 -UCR_ENT 00078565) (EAPZ). Olancho: La Union Parq Nac La Maralla, 15.07949°N 86.76175°W, 1060m, 14 Sep 1994, R. Cordero, 1♀ (UCR _ ENT 00078566) (EAPZ). Etymology: Named for the type locality “Tatumbia Montana” in Honduras (noun in apposition). Diagnosis: Recognized by the mid-sized body length (1.51 mm), elongate oval outline of forewings, inflated tip of scutellum (black arrow) (Fig. 4), vesica relatively thick and straight with acute tip, not reaching pygophore margin, and without anophoric process (Fig. 7). Description: Male: Total body length 1.51 mm; length from posterior margin of pronotum to posterior wing margin 1.27 mm; greatest width across pronotum 0.62 mm; greatest width across forewings 0.88 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing extremely long. Structure: Head: Eye about one third as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum small, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 trapezoidal; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex fairly straight; anophoric ridge without process; right paramere curved, broad throughout, basal process broad; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method and habitat: Unknown., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on page 278, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus dispar, sp. n. (Figs 2, 9) Holotype. Female. BRAZIL: Mato Grosso: Jacare Alto Xingu, 10.54341°S 53.75637°W, 330m, 01 Nov 1965, Alvarenga & Werner, 1♀ (UCR _ ENT 00090847) (FMNH). Etymology: Named for the characteristic wing venation after “dispar” Latin for different. Diagnosis: Recognized by the very small size (total body length 0.66 mm), forewing with distinct honey-comb pattern (black arrow), absence of An1/2 claval process, expanded scc divided by sinuous, transverse vein (white arrow), length and shape of rc1 (black star), distinctly surpassing apex of rc and tc, rectangular rc2–3 (white star), and slender and elongate cub (grey star) and tc (Fig. 2). Description: Female: Total body length 0.66 mm; length from posterior margin of pronotum to posterior wing margin 0.51 mm; greatest width across pronotum 0.28 mm; greatest width across forewings 0.42 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with sparse, short setae; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars small. Thorax: Anterior pronotal margin concave, posterior margin almost straight; pits on pronotum large, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip pointed. Forewing: with outline broad anteriorly, elongate oval; with distinct honey-comb pattern; membrane contributing less than one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc narrow, wider at widest part of wing; distal process of R weakly developed; An1/2 process on clavus absent; An1 wing organ absent (as in all females); rc1 about 4 times as long as wide, much wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells angular s-shaped; rc2-3 rectangular; cub removed from wing margin; dc1 with basal portion relatively wide and short. Legs: Claws short. Genitalia: As in generic description. Male: Unknown. Collecting method and habitat: Unknown. Discussion: This species is set apart from all other species of Guapinannus both in terms of morphology (size, forewing sculpture, wing venation) and distribution (the only documented species of Guapinannus from Brazil). We decided to include this species into Guapinannus and to somewhat expand the concept of this genus, because G. dispar, sp. n., is more similar to species of “core” Guapinannus than to any other species of Schizopteridae we have seen from the Neotropical region. Once male specimens become available for this species, our hypothesis should be further tested., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on pages 270-272, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus castigatus, sp. n. (Figs 2, 7, 9) Holotype. Male. MEXICO: Chiapas: Palenque, 15.63333°N 92.65°W, 2500m, 02 Jul 1983 – 30 Jul 1983, S. B. Peck, J. Kukalova-Peck, R. S. Anderson, 1♂ (UCR _ ENT 00101251) (FMNH). Etymology: Named for the stout vesica after “castigatus” Latin for stout. Diagnosis: Recognized by the mid-sized body length (1.48 mm), elongate oval forewing outline, wide C+Sc (black arrow), small vein-tracing areoles along scc, rc, rc1 (white arrow) (Fig. 2), slightly extended right pygophore margin (black star), vesica relatively short and thick, tapering into acute tip, and without anophoric process (Fig. 7). Similar to G. auriculus, sp. n. in length and shape of vesica but differentiated by differentiated from that species by the slender and long rc1. Description: Male: Total body length 1.48 mm; length from posterior margin of pronotum to posterior wing margin 1.27 mm; greatest width across pronotum 0.66 mm; greatest width across forewings 0.88 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip pointed. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing present; areoles small, distributed along scc, rc, rc1, and tc; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, elongate, with median notch, without notch articulating with claval process; scc about 2 times as wide as long; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 trapezoidal; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore with slightly extended right margin; vesica with about half loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge without process; right paramere curved, tapering, basal process narrow; left paramere straight, tapering, basal process narrow. Female: Unknown. Collecting method and habitat: Collected using flight intercept trap in rainforest.

Guapinannus plurilobus, sp. n. (Figs 3, 7, 9) Holotype. Male. PERU: Amazonas: Pacaya–Samiria National Reserve, 5.2012°S 74.59319°W, 280m, 07 Nov 1980, CI. Vaucher, 1♂ (UCR _ ENT 00089590) (MHNG). Paratypes: PERU: Amazonas: Pacaya–Samiria National Reserve, 5.2012°S 74.59319°W, 280m, 07 Nov 1980, CI. Vaucher, 4♂ (UCR _ ENT 00089589, UCR_ENT 00089591-UCR_ENT 00089593), 5♀ (UCR _ ENT 00089594 - UCR_ENT 00089598) (MHNG). Unknown locality in Peru, no date provided, collector unknown, 1♀ (UCR _ ENT 00089582) (MHNG). Etymology: Named for the multiple lobes on the anophoric process after “pluri” and “lobus” Latin for multiple lobes. Diagnosis: Recognized by the small body length (1.14 mm), relatively short rc1, rc, and tc cells (black star) (Fig. 3), slender vesica with one loop, and multilobed anophoric process, with combination of blunt and acute tips (black arrow) (Fig. 7). Description: Male: Total body length 1.14 mm; length from posterior margin of pronotum to posterior wing margin 0.8 mm; greatest width across pronotum 0.44 mm; greatest width across forewings 0.67 mm. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium weakly inflated, elongate, with median notch; without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc slightly wider than other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 almost triangular; cub almost reaching wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with one loop, not reaching right pygophore margin, relatively slender at midpoint, tapering to blunt tip, close to apex rounded; anophoric ridge with process, process long, with multiple lobes, tip blunt; right paramere curved, broad throughout, basal process broad; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method: Collected using Winkler extraction., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on pages 274-275, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus dispar, sp. n. (Figs 2, 9) Holotype. Female. BRAZIL: Mato Grosso: Jacare Alto Xingu, 10.54341°S 53.75637°W, 330m, 01 Nov 1965, Alvarenga & Werner, 1♀ (UCR _ ENT 00090847) (FMNH). Etymology: Named for the characteristic wing venation after “dispar” Latin for different. Diagnosis: Recognized by the very small size (total body length 0.66 mm), forewing with distinct honey-comb pattern (black arrow), absence of An1/2 claval process, expanded scc divided by sinuous, transverse vein (white arrow), length and shape of rc1 (black star), distinctly surpassing apex of rc and tc, rectangular rc2–3 (white star), and slender and elongate cub (grey star) and tc (Fig. 2). Description: Female: Total body length 0.66 mm; length from posterior margin of pronotum to posterior wing margin 0.51 mm; greatest width across pronotum 0.28 mm; greatest width across forewings 0.42 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with sparse, short setae; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars small. Thorax: Anterior pronotal margin concave, posterior margin almost straight; pits on pronotum large, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip pointed. Forewing: with outline broad anteriorly, elongate oval; with distinct honey-comb pattern; membrane contributing less than one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc narrow, wider at widest part of wing; distal process of R weakly developed; An1/2 process on clavus absent; An1 wing organ absent (as in all females); rc1 about 4 times as long as wide, much wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells angular s-shaped; rc2-3 rectangular; cub removed from wing margin; dc1 with basal portion relatively wide and short. Legs: Claws short. Genitalia: As in generic description. Male: Unknown. Collecting method and habitat: Unknown. Discussion: This species is set apart from all other species of Guapinannus both in terms of morphology (size, forewing sculpture, wing venation) and distribution (the only documented species of Guapinannus from Brazil). We decided to include this species into Guapinannus and to somewhat expand the concept of this genus, because G. dispar, sp. n., is more similar to species of “core” Guapinannus than to any other species of Schizopteridae we have seen from the Neotropical region. Once male specimens become available for this species, our hypothesis should be further tested.

Guapinannus castigatus, sp. n. (Figs 2, 7, 9) Holotype. Male. MEXICO: Chiapas: Palenque, 15.63333°N 92.65°W, 2500m, 02 Jul 1983 – 30 Jul 1983, S. B. Peck, J. Kukalova-Peck, R. S. Anderson, 1♂ (UCR _ ENT 00101251) (FMNH). Etymology: Named for the stout vesica after “castigatus” Latin for stout. Diagnosis: Recognized by the mid-sized body length (1.48 mm), elongate oval forewing outline, wide C+Sc (black arrow), small vein-tracing areoles along scc, rc, rc1 (white arrow) (Fig. 2), slightly extended right pygophore margin (black star), vesica relatively short and thick, tapering into acute tip, and without anophoric process (Fig. 7). Similar to G. auriculus, sp. n. in length and shape of vesica but differentiated by differentiated from that species by the slender and long rc1. Description: Male: Total body length 1.48 mm; length from posterior margin of pronotum to posterior wing margin 1.27 mm; greatest width across pronotum 0.66 mm; greatest width across forewings 0.88 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip pointed. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing present; areoles small, distributed along scc, rc, rc1, and tc; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, elongate, with median notch, without notch articulating with claval process; scc about 2 times as wide as long; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 trapezoidal; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore with slightly extended right margin; vesica with about half loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge without process; right paramere curved, tapering, basal process narrow; left paramere straight, tapering, basal process narrow. Female: Unknown. Collecting method and habitat: Collected using flight intercept trap in rainforest., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on page 269, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus minutus, sp. n. (Figs 3, 9) Holotype. Female. COSTA RICA: Heredia: Sarapiqui Co.: P.N. Braulio Carrillo, 16 Km SSE La Virgen, 10.26784°N 84.084°W, 1050 m, 20 Feb 2001 – 23 Feb 2001, INBio-OET-ALAS, 1♀ (UCR _ ENT 00014609) (INBIO). Etymology: Named for the small body size after “minutus” Latin for small. Diagnosis: Recognized by the small size (1.14 mm), inflated tip of scutellum (white arrow), well-defined proximal part of Cu (black arrow), and dark coloration (female-based) (Fig. 3). Description: Female: Total body length 1.14 mm; length from posterior margin of pronotum to posterior wing margin 0.90 mm; greatest width across pronotum 0.52 mm; greatest width across forewings 0.71 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip inflated. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc uniformly fairly broad; distal process of R pronounced; An1 wing organ on corium absent (as in all females); rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 almost triangular; cub almost reaching wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia: As in generic description. Male: Unknown. Collecting method and habitat: Unknown.

Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae) was described based on a single female specimen from Costa Rica. Some additional specimens representing this genus have since become available and were incorporated into a comparative male genitalic study across Dipsocoromorpha and into combined molecular and morphological hypotheses of the infraorder. However, the species-level diversity of Guapinannus has remained unexplored and undocumented. Based on examination of 264 specimens from central and South America, we here revise the taxonomy of Guapinannus, describing 19 species as new (Guapinannus anaticulus, sp. n.; Guapinannus artus, sp. n.; Guapinannus auriculus, sp. n.; Guapinannus castigatus, sp. n.; Guapinannus clava, sp. n.; Guapinannus dispar, sp. n.; Guapinannus falcis, sp. n.; Guapinannus graziae, sp. n.; Guapinannus minutus, sp. n.; Guapinannus orbiculatus, sp. n.; Guapinannus plurilobus, sp. n.; Guapinannus policis, sp. n.; Guapinannus robustus, sp. n.; Guapinannus sinuosus, sp. n.; Guapinannus tatumbia, sp. n.; Guapinannus tenuis, sp. n.; Guapinannus tergus, sp. n.; Guapinannus trilobus, sp. n.; Guapinannus uncus, sp. n.). In addition, we provide photos of the female holotype of Guapinannus bierigi Wygodzinsky, 1951, SEM documentation for Guapinannus clava, sp. n., habitus photos and a map for all species, and line drawings of male genitalic features for all species for which males are known.

Guapinannus graziae, sp. n. (Figs 3, 7, 9) Holotype. Male. NICARAGUA: Region Autonoma del Atlantico Sur: 13km WNW Rama, 12.19472°N 84.33667°W, 190 m, 18 Apr 2011, J. T. Longino, 1♂ (UCR _ ENT 00102045) (FMNH). Paratypes: NICARAGUA: Region Autonoma del Atlantico Sur: 13km WNW Rama, 12.19472°N 84.33667°W, 190 m, 18 Apr 2011, J. T. Longino, 3♀ (UCR _ENT 00102046-UCR_ENT 00102048), 1♂ (UCR _ENT 00101103) associated with Carduus occidentalis Nutt. (Asteraceae), 1♂ (UCR _ENT 00102049) (FMNH). Rivas: Matagalpa: RN Cerro Musún, 12.95944°N 85.225°W, 800m, 01 May 2011, collector unknown, 1♂ (UCR _ENT 00101361) (FMNH). Etymology: Named after our dear mentor, colleague, and friend, the grande dame of South American heteropteran systematics, Jocelia Grazia. Diagnosis: Recognized by the small body length (1.16 mm), very broad C+Sc margin (white arrow) (Fig. 3), slightly s-shaped vesica, and short, curved anophoric process (black arrow) (Fig. 7). Description: Male: Total body length 1.16 mm; length from posterior margin of pronotum to posterior wing margin 0.89 mm; greatest width across pronotum 0.56 mm; greatest width across forewings 0.69 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip pointed. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin squarish, veintracing areoles on proximal part of wing absent; C+Sc very broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, elongate, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells s-shaped; rc2–3 trapezoidal; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex slightly s-shaped; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, tapering, basal process narrow; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method and habitat: Collected using Winkler extraction in second growth forest and tropical wet forest.

Guapinannus tergus, sp. n. (Figs 4, 7, 9) Holotype. Male. ECUADOR: Pastaza: 25 km N Puyo, 1.2855°S 78.02291°W, 1000 m, 13 Jul 1976, S. B. Peck, 1♂ (UCR _ ENT 00090642) (FMNH). Paratypes: ECUADOR: Pastaza: Pastaza, 1.43583°S 78.00194°W, 972m, 13 Jul 1976, S. B. Peck, 4♂ (UCR _ ENT 00090643 -UCR_ENT 00090646) (FMNH). Etymology: Named for the long ridge-like process on the anophoric after “tergus” Latin for ridge (noun in apposition). Diagnosis: Recognized by the very small body length (0.67 mm), small vein-tracing areoles along rc and rc1 (black arrow) (Fig. 4), almost full-loop, circular vesica, and long anophoric process with curved single tip (black arrow) (Fig. 7). Description: Male: Total body length 0.67 mm; length from posterior margin of pronotum to posterior wing margin 0.52 mm; greatest width across pronotum 0.28 mm; greatest width across forewings 0.42 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip pointed. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles small, distributed along rc and rc1; C+Sc fairly narrow, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, rounded, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 trapezoidal; cub almost reaching wing margin; dc1 horse head-shaped. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process long, with single lobe curved, tip pointed; right paramere curved, broad throughout, basal process narrow; left paramere straight, broad throughout, basal process narrow. Female: Unknown. Collecting method and habitat: Collected using Berlese extraction in cloud forest litter.

Guapinannus orbiculatus, sp. n. (Figs 3, 7, 9) Holotype. Male. PANAMA: Bocas del Toro: Bocas del Toro: Almirante, trail to dam on Nigua Creek, 9.29792°N 82.4211°W, 32m, 31 Mar 1959, H. S. Dybas, 1♂ (UCR _ ENT 00090718) (FMNH). Paratypes: PANAMA: Bocas del Toro: Bocas del Toro: Almirante, trail to dam on Nigua Creek, 9.29792°N 82.4211°W, 12m, 31 Mar 1959, H. S. Dybas, 1♂ (UCR _ ENT 00097813), 4♀ (UCR _ ENT 00097814 -UCR_ENT 00097817), 2 nymphs (UCR _ ENT 00097818, UCR_ENT 00097819) (FMNH). Chiriqui: Near Nueva California W. of Finca Palo Santo, 8.5°N 82.41667°W, 1524 m, 10 Mar 1959, H. S. Dybas, 1♂ (UCR _ ENT 00090796) (FMNH). Diagnosis: Recognized by the small mid-sized body length (1.26 mm), elongate body shape (Fig. 3), one-loop, relatively thick vesica with pointed tip, and short, slender, pointed anophoric process (black arrow) (Fig. 7). Description: Male: Total body length 1.26 mm; length from posterior margin of pronotum to posterior wing margin 0.9 mm; greatest width across pronotum 0.53 mm; greatest width across forewings 0.68 mm. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye about one third as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc uniformly fairly broad; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch; without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc slightly wider than other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 trapezoidal; cub almost reaching wing margin; dc1 horse head-shaped. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process short, slender, with single lobe curved, tip pointed; right paramere curved, tapering, basal process broad; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method and microhabitat: Collected using Berlese and Winkler extraction from the cortex of a hollowed palm stump and from floor litter at base of a log and cut stump. Etymology: Named for the rounded vesica after “orbiculatus” Latin for round., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on page 274, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus artus, sp. n. (Figs 2, 7, 9) Holotype. Male. MEXICO: Veracruz: Road to Ruiz Cortinez, 18.5229°N 95.15441°W, 1114 m, 05 Jun 2016, R. S. Anderson, 1♂ (UCR _ ENT 00125959) (UCR). Paratypes: MEXICO: Veracruz: Road to Ruiz Cortinez, 18.5229°N 95.15441°W, 1114 m, 05 Jun 2016, R. S. Anderson, 1♀ (UCR _ ENT 00125960) (UCR). Road to Ruiz Cortinez, 18.52241°N 95.14957°W, 1170 m, 04 Jun 2016, R. S. Anderson, 1♀ (UCR _ ENT 00125961) (UCR). San Andres Tuxtla Co.: 18.52303°N 95.15453°W, 1109 m, 05 Jun 2016, Manuel Barrios, 2♂ (UCR _ ENT 00128215, UCR_ENT 00128216) (UCR). Etymology: Named for narrow rc cell of the forewing in dorsal view after “artus” Latin for narrow. Diagnosis: Recognized by the mid-sized body length (1.29 mm), elongate oval forewing outline, rc about 5 times as long as wide (black star), tc about 3 times as long as wide (Fig. 2), lateral lobe on right side of pygophore (black star), slender vesica, and short, broad anophoric process with blunt tip (black arrow) (Fig. 7). Similar to G. auriculus, sp. n. that is also known from Veracruz in Mexico but distinguished by the characters listed in the diagnosis. Description: Male: Total body length 1.29 mm, length from posterior margin of pronotum to posterior wing margin 1.04 mm; greatest width across pronotum 0.54 mm; greatest width across forewings 0.75 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum large, in distinct clusters; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: with outline broad anteriorly, elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, veintracing areoles on proximal part of wing absent; C+Sc wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, rounded, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 5 times as long as wide; tc 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 almost triangular; cub almost reaching wing margin; dc1 horse headshaped. Legs: Claws long. Genitalia (Fig. 7): Pygophore with lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, relatively slender at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process short, broad, with single lobe curved, tip blunt; right paramere curved, tapering, basal process narrow; left paramere, tapering, basal process narrow. Female: As in male and generic description. Collecting method and habitat: Collected using sifting leaf litter, Winkler extraction in mixed hardwood forest., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on page 267, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus bierigi Wygodzinsky, 1951 (Figs 1, 9) Diagnosis: Recognized by the mid-sized body length (1.45 mm), part of An1 and Cu forming posterodistal margin of tc more pronounced than other veins, and the great distance of cub from the margin of the wing. Most similar to G. falcis, sp. n., that is also known from Costa Rica, but distinguished by the much greater distance of cub from the wing margin compared to G. falcis, sp. n. Re-description: Female: Total body length 1.45 mm, greatest width across pronotum 0.67 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin straight; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip pointed. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium absent (as in all females); rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about three times as long as wide; part of An1 and Cu forming posterodistal margin of tc more pronounced than other veins; distal margin of rc1, rc, and tc cells s-shaped; rc2-3 almost triangular; cub removed from wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia: As in generic description (Fig. 1). Male: Unknown. Specimens examined: Holotype: COSTA RICA: Limon: Guapiles, 10.2167°N 83.7833°W, 268 m, 05 Feb 1946 – 13 Feb 1946, A. Bierig, 1♀ (AMNH _ IZC 00150354) (AMNH)., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on pages 268-269, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718, {"references":["Wygodzinsky, P. (1951) Descripcion de generos y especies nuevos de la familia Cryptostemmatidae (Hemiptera). Revista Brasileira de Biologia, 11, 259 - 270."]}

Guapinannus auriculus, sp. n. (Figs 2, 7, 9) Holotype. Male. MEXICO: Veracruz: San Andres Tuxtla Co.: 18.52303°N 95.15453°W, 1109 m, 05 Jun 2016, Manuel Barrios, 4♂ (UCR _ ENT 00125965) (UCR). Paratypes: MEXICO: Veracruz: hills above Ruiz Cortinez, 18.5304°N 95.14127°W, 1239 m, 07 Jun 2016, R. S. Anderson, 1#f (UCR _ ENT 00126156) (UCR). San Andres Tuxtla Co.: 18.52303°N 95.15453°W, 1109 m, 05 Jun 2016, Manuel Barrios, 8♂ (UCR _ ENT 00125966, UCR_ENT 00128211, UCR_ENT 00128214), 13♀ (UCR _ ENT 00125967, UCR_ENT 00126150) (UCR). Etymology: Named for the large lobe on the right side of the pygophore after “auricula” Latin for lobe. Diagnosis: Recognized by the mid-sized body length (1.23 mm), rc about 4 times as long as wide (white star), tc less than 3 times as long as wide (Fig. 2), large lateral lobe on right side of pygophore (black star), slender vesica tapering into acute tip, and anophoric process very short, curved, and pointed (black arrow) (Fig. 7). Similar to G. artus, sp. n. that is also known from Veracruz in Mexico but distinguished by the characters listed in the diagnosis. Additionally, G. auriculus, sp. n. and G. castigatus, sp. n. have a similar vesica, but differ in rc1 shape. Description: Male: Total body length 1.23 mm; length from posterior margin of pronotum to posterior wing margin 0.9 mm; greatest width across pronotum 0.55 mm; greatest width across forewings 0.75 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing extremely long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum large, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, rounded, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 4 times as long as wide; tc 3 less than 3 times as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 almost triangular; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore with large lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, tapering, basal process narrow; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method and habitat: Collected using sifting leaf litter, Winkler extraction in broadleaf forest and tree ferns.

Guapinannus uncus, sp. n. (Figs 4, 7, 9) Holotype. Male. BELIZE: Belize, 17.18988°N 88.49765°W, 55m, no date provided, collector unknown, 1♂ (UCR _ ENT 00090858) (FMNH). Paratypes: BELIZE: Orange Walk: Rio Bravo Cons. Area 3 Well Tran (Near Res. Station), 18.06667°N 88.55°W, 10m, 10 Sep 1995, P. W. Kovarik, 1♂ (UCR _ ENT 00094283) (UCR). Etymology: Named for the hook-shaped vesica after “uncus” Latin for hook (noun in apposition). Diagnosis: Recognized by the small mid-sized body length (0.67 mm), elongate oval body shape (length to width ratio 3.4) (Fig. 4), and apex of vesica hook-shaped (Fig. 7). Description: Male: Total body length 1.19 mm; length from posterior margin of pronotum to posterior wing margin 0.97 mm; greatest width across pronotum 0.27 mm; greatest width across forewings 0.35 mm. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye almost half as high as head; muscle scars indistinct. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum small, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip pointed. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc slightly wider than other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 trapezoidal; cub almost reaching wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, surpassing right pygophore margin, thick at midpoint, with bottle opener-shaped apex, close to apex rounded; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, broad throughout, basal process broad; left paramere straight, tapering, basal process broad. Female: Unknown. Collecting method and habitat: Collected using flight intercept trap., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on page 283, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus robustus, sp. n. (Figs 3, 7, 9) Holotype. Male. MEXICO: Chiapas: RSV A El Triunfo, Est. El Triunfo, 16.20286°N 91.86044°W, 1950 m, 08 Aug 1996 – 11 Aug 1996, A. R. Gillogly, 1♂ (UCR _ ENT 00094282) (UCR). Etymology: Named for the extremely thick vesica after “robustus” Latin for robust. Diagnosis: Recognized by the mid-sized body length (1.49 mm), small vein-tracing areoles distributed along scc, rc and rc1 (black arrow) (Fig. 3), slight extensions of the right pygophore margin (black star), and very thick vesica with blunt tip (Fig. 7). Description: Male: Total body length 1.49 mm; length from posterior margin of pronotum to posterior wing margin 1.1 mm; greatest width across pronotum 0.28 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense setae, setae long; setae on posterior margin of forewing extremely long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view gradually narrowed to tip, tip rounded. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin rounded, vein-tracing areoles small, distributed along scc, rc and rc1; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium strongly inflated, triangular, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 5 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc of similar width as other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 trapezoidal; cub almost reaching wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia (Fig. 7): Pygophore with slightly extended right margin; vesica with about half loop, not reaching right pygophore margin, very thick at midpoint, tapering to blunt tip, close to apex slightly s-shaped; anophoric ridge with process, process short, with single lobe relatively straight, tip pointed; right paramere curved, broad throughout, basal process broad; left paramere straight, tapering, basal process narrow. Female: Unknown. Collecting method: Collected using a flight intercept trap., Published as part of Frankenberg, Sarah, Knyshov, Alexander, Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2021, Taxonomic revision of Guapinannus Wygodzinsky, 1951 (Hemiptera: Schizopteridae), with description of 19 new species, pp. 261-286 in Zootaxa 4958 (1) on page 277, DOI: 10.11646/zootaxa.4958.1.14, http://zenodo.org/record/4691718

Guapinannus falcis, sp. n. (Figs 2, 7, 8, 9) Holotype. Male. COSTA RICA: Heredia: 6 km ENE Vara Blanca, 10.18333°N 84.11667°W, 2000 m, 16 Mar 2002, INBio-OET-ALAS, 1♂ (UCR _ ENT 00014616) (INBIO). Paratypes: COSTA RICA: Alajuela: Upala Co.: Bijagua, San Miguel, Finca Inti-Aura, 10.75778°N 85.00939°W, 300 m, 16 Apr 2011 – 20 May 2011, I. Chacon, 1♂ (UCR _ ENT 00014608) (INBIO). Heredia: Sarapiqui Co.: P.N.B. Carrillo 5 km. E Vara Blanca, 10.17226°N 84.11213°W, 2100 m, 20 Apr 2002, INBio-OET-ALAS, 1♀ (UCR _ ENT 00014611) (INBIO). P.N.B. Carrillo 6 km. ENE Vera Blanca, 10.15°N 83.91667°W, 2000 m, 17 Feb 2002 – 21 Feb 2002, INBio-OET-ALAS, 1♀ (UCR _ ENT 00014612) (INBIO); 10 Mar 2002, INBio-OET-ALAS, 1♀ (UCR _ ENT 00014610), 1♂ (UCR _ ENT 00014613) (INBIO). 6 km ENE Vara Blanca, 10.18333°N 84.11667°W, 2000 m, 16 Mar 2002, INBio-OET-ALAS, 1♀ (UCR _ ENT 00014614) (INBIO); 22 Mar 2002, INBio-OET-ALAS, 4♀ (UCR _ ENT 00014618 -UCR_ENT 00014621) (INBIO). Etymology: Named for sickle shaped vesica after “flax” Latin for sickle. Diagnosis: Recognized by the mid-sized body length (1.56 mm), dense vestiture, part of An1 and Cu forming posterodistal margin of tc more pronounced than other veins (black arrow) (Fig. 2), long, relatively slender vesica, with s-shaped bent proximal of acute tip, and short, curved anophoric process with pointed tip (black arrow) (Fig. 7). Most similar to G. bierigi, sp. n., that is also known from Costa Rica, but distinguished by the much smaller distance of cub from the wing margin compared to G. bierigi, sp. n. Description: Male: Total body length 1.56 mm; length from posterior margin of pronotum to posterior wing margin 1.27 mm; greatest width across pronotum 0.65 mm; greatest width across forewings 0.87 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with dense, long setae; setae on posterior margin of forewing long. Structure: Head: Eye about one third as high as head; muscle scars not observed. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum large, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip pointed. Forewing: With outline broad anteriorly, elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc uniformly broad; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch; without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 5 times as long as wide; tc more than 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc more pronounced than other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 almost triangular; cub almost reaching wing margin; dc1 with basal portion relatively wide and short. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, surpassing right pygophore margin, relatively slender at midpoint, tapering to acute tip, close to apex slightly s-shaped; anophoric ridge with process, process short, with single lobe curved, tip pointed; right paramere curved, broad throughout, basal process broad; left paramere straight, tapering, basal process broad. Female: As in male and generic description. Collecting method and habitat: Collected using Malaise trap in unknown habitat.

Guapinannus orbiculatus, sp. n. (Figs 3, 7, 9) Holotype. Male. PANAMA: Bocas del Toro: Bocas del Toro: Almirante, trail to dam on Nigua Creek, 9.29792°N 82.4211°W, 32m, 31 Mar 1959, H. S. Dybas, 1♂ (UCR _ ENT 00090718) (FMNH). Paratypes: PANAMA: Bocas del Toro: Bocas del Toro: Almirante, trail to dam on Nigua Creek, 9.29792°N 82.4211°W, 12m, 31 Mar 1959, H. S. Dybas, 1♂ (UCR _ ENT 00097813), 4♀ (UCR _ ENT 00097814 -UCR_ENT 00097817), 2 nymphs (UCR _ ENT 00097818, UCR_ENT 00097819) (FMNH). Chiriqui: Near Nueva California W. of Finca Palo Santo, 8.5°N 82.41667°W, 1524 m, 10 Mar 1959, H. S. Dybas, 1♂ (UCR _ ENT 00090796) (FMNH). Diagnosis: Recognized by the small mid-sized body length (1.26 mm), elongate body shape (Fig. 3), one-loop, relatively thick vesica with pointed tip, and short, slender, pointed anophoric process (black arrow) (Fig. 7). Description: Male: Total body length 1.26 mm; length from posterior margin of pronotum to posterior wing margin 0.9 mm; greatest width across pronotum 0.53 mm; greatest width across forewings 0.68 mm. General coloration: uniformly pale. Vestiture: Dorsum with sparse setae, setae short; setae on posterior margin of forewing long. Structure: Head: Eye about one third as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum medium-sized, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip rounded. Forewing: With outline elongate oval; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc uniformly fairly broad; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch; without notch articulating with claval process; rc1 about 3 times as long as wide, slightly wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc slightly wider than other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2-3 trapezoidal; cub almost reaching wing margin; dc1 horse head-shaped. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with between half and one loop, not reaching right pygophore margin, thick at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process short, slender, with single lobe curved, tip pointed; right paramere curved, tapering, basal process broad; left paramere straight, tapering, basal process narrow. Female: As in male and generic description. Collecting method and microhabitat: Collected using Berlese and Winkler extraction from the cortex of a hollowed palm stump and from floor litter at base of a log and cut stump. Etymology: Named for the rounded vesica after “orbiculatus” Latin for round.

Guapinannus trilobus, sp. n. (Figs 4, 7, 9) Holotype. Male. MEXICO: Veracruz: San Andres Tuxtla Co.: 18.52303°N 95.15453°W, 1109 m, 05 Jun 2016, Manuel Barrios, 1♂ (UCR _ ENT 00128210) (UCR). Paratypes: MEXICO: Veracruz: Road to Ruiz Cortinez, 18.5229°N 95.15441°W, 1114 m, 05 Jun 2016, R. S. Anderson, 1♂ (UCR _ ENT 00125950), 2♀ (UCR _ ENT 00125951) (UCR). Etymology: Named for the three lobes on the anophoric process after “trilobus” Latin for three lobes. Diagnosis: Recognized by the mid-sized body length (1.40 mm), broad C+Sc (black arrow) (Fig. 4), vesica with almost one circular loop with acute tip, and anophoric process with multiple pointed tips (black arrows) (Fig. 7). Description: Male: total body length 1.40 mm; length from posterior margin of pronotum to posterior wing margin 1.03 mm; greatest width across pronotum 0.61 mm; greatest width across forewings 0.85 mm. General coloration: mix of pale and darker brown or reddish brown. Vestiture: Dorsum with sparse setae, setae long; setae on posterior margin of forewing extremely long. Structure: Head: Eye almost half as high as head; muscle scars large. Thorax: Anterior pronotal margin concave, posterior margin slightly concave; pits on pronotum large, evenly distributed; scutellum in dorsal view abruptly narrowed to tip, tip pointed. Forewing: With outline broad anteriorly; membrane contributing about one third of forewing length, posterior distal margin squarish, vein-tracing areoles on proximal part of wing absent; C+Sc broad, wider at widest part of wing; distal process of R pronounced; An1 wing organ on corium inflated, elongate, with median notch, without notch articulating with claval process; rc1 about 3 times as long as wide, much wider anteriorly; rc about 4 times as long as wide; tc about 3 times as long as wide; part of An1 and Cu forming posterodistal margin of tc slightly wider than other veins; distal margin of rc1, rc, and tc cells double s-shaped; rc2–3 almost triangular; cub almost reaching wing margin; dc1 with basal portion fairly narrow and elongate. Legs: Claws long. Genitalia (Fig. 7): Pygophore without lobe on right side; vesica with almost one loop, not reaching right pygophore margin, relatively slender at midpoint, tapering to acute tip, close to apex rounded; anophoric ridge with process, process long, with multiple pointed tips; right paramere curved, broad throughout, basal process broad; left paramere curved and tapering, basal process broad. Female: As in male and generic description. Collecting method and habitat: Collected using leaf litter sifting and Winkler extraction from mixed hardwood forest.

Automated insect identification systems have been explored for more than two decades but have only recently started to take advantage of powerful and versatile convolutional neural networks (CNNs). While typical CNN applications still require large training image datasets with hundreds of images per taxon, pretrained CNNs recently have been shown to be highly accurate, while being trained on much smaller datasets. We here evaluate the performance of CNN-based machine learning approaches in identifying three curated species-level dorsal habitus datasets for Miridae, the plant bugs. Miridae are of economic importance, but species-level identifications are challenging and typically rely on information other than dorsal habitus (e.g., host plants, locality, genitalic structures). Each dataset contained 2–6 species and 126–246 images in total, with a mean of only 32 images per species for the most difficult dataset. We find that closely related species of plant bugs can be identified with 80–90% accuracy based on their dorsal habitus alone. The pretrained CNN performed 10–20% better than a taxon expert who had access to the same dorsal habitus images. We find that feature extraction protocols (selection and combination of blocks of CNN layers) impact identification accuracy much more than the classifying mechanism (support vector machine and deep neural network classifiers). While our network has much lower accuracy on photographs of live insects (62%), overall results confirm that a pretrained CNN can be straightforwardly adapted to collection-based images for a new taxonomic group and successfully extract relevant features to classify insect species.

Perittonannus gen. n. urn:lsid:zoobank.org:act: 207E33A1-959D-4B09-9909-C29FDC791878 Figures 1, 2D, E, 3 G���I, 6B, 7A Type species. Perittonannus antiquus sp. n. Diagnosis. Distinguished among Schizopteridae by the relatively small body size (0.96-1.13 mm), small round- ed head about as long as high in lateral view, medium-sized eye in lateroventral position, slender four-segmented labium (Fig. 1), R with three branches, subcostal vein, R1 and R2 fused just beyond midpoint of forewing, rc3 boomerang-shaped, dc1 large, rc and tc cells of similar subrectangular shape and size, tc with four emanating veins (Fig. 2D), long, robust, and very setose legs (Fig. 1), tarsal formula 2-2-2 (Fig. 3 G-I), symmetrical abdomen with dorsum and ventrum equally sclerotized, genitalia sinistrally directed, laterotergites 9 present on both sides as free-moving appendages with enlarged apices, short thick vesica with apical funnel-shaped expansion, conjunctiva with heavily sclerotized quadrate sclerite on left side of pygophore (see Knyshov et al. [2018] their Figs 1o, 4d, 14b), and the well-developed ovipositor. Description. Male: macropterous, suboval, relatively small body size (0.96-1.13 mm). Coloration (Fig. 1). Body dark brown, antenna pale yellowish, labium pale yellowish with dark brown apex, forewing dark brown with broad white transverse band across proximal portion of subcostal cell, basal cell, and distal half of clavus, legs pale yellowish. Vestiture (Fig. 1). Body with dense cover of microtrichia, some longer semierect setae lateroventrally on head and laterally on thorax, and medium-length subadpressed setae dorsally on head and pronotum, legs densely beset with long, fairly stout, semirect setae. Structure. Head (Fig. 1): small and rounded in dorsal view, about as long as high in lateral view, synthlipsis about 5.5 times as wide as eye, eye in lateroventral position, largely obscured in dorsal view, prominent in ventral view; labium four-segmented, reaching apex of middle coxa, first segment inflated, second to fourth segments very slender and of similar diameter; antenna with short scape and pedicel (flagellomeres missing). Thorax (Fig. 1): pronotum broad and short, slightly less than half as long as wide, collar narrow, anterior and posterior pronotal lobes not demarcated, posterior margin in dorsal view almost straight, scutellum small and narrow, with tapering apex, metathorax without obvious gland evaporatory structures. Forewing (Fig. 2D): macropterous, with slender scc, R with three branches, Sc, R1 and R2 fused just beyond midpoint of forewing, rc3 narrow and boomerang-shaped, dc1 large, rc and tc of similar subrectangular shape and size, cub oval, relatively small; Sc and R1 heavily sclerotized to point of fusion with R2, Sc distinct to tip of forewing and Cu. Legs: long and robust (Fig. 1), subapical combs on fore-, middle, and hind tibiae (Fig. 3 G-I), hind tibia with row of slender capitate setae (Fig. 3H, I); tarsal formula 2-2-2 (Fig. 3 G-I), fore- and middle tarsus as slender as hind tarsus incrassate (Fig. 3 G-I), first tarsomeres very short, second ~3-4 times longer than first, claws slender and long, ~1/3 of second tarsomere length; bladderlike arolium absent, parempodia with tapering apex. Abdomen and genitalia: Documented and described in Knyshov et al. (2018) based on specimen UCR_ENT 00014811 (their Figs 1o, 4d, 14b, and 19e): ���Pregenital abdomen. Symmetrical, not laterally curved, dorsum, and ventrum equally sclerotized. All abdominal segments equally sclerotized. Dorsal surface smooth. Pregenital laterotergites indistinct. Two pairs of spiracles present (segments 7���8), located on lateral margins of sternum (segment 7), or on lateral margins of mediotergite (segment 8). Scars of DAG orifices present medially along anterior margin of mediotergite 7. Pregenital abdomen modifications. Mediotergite 7 symmetrical, short. Laterotergites indistinct. Sternum 7 symmetrical, long. Genitalia. Sinistrally directed. Mediotergite 8 symmetrical, short. Laterotergites 8 indistinct. Sternum 8 indistinct. Pygophore symmetrical, oval, open dorsally, mediotergite 9 indistinct. Laterotergites 9 distinct, nearly symmetrical, elongated. Parameres asymmetrical, left larger than right. Left paramere elongated, basal process elongated and rounded, apical process elongated and rounded. Right paramere elongated, basal process short and rounded, apical process elongated and rounded. Basal plates weakly asymmetrical. Phallosoma reduced. Conjunctiva heavily sclerotized, represented by large quadrate sclerite and one short rounded appendage. Vesica with narrow base and coiled thick short distal region, expanding around apex into funnel. Anophore symmetrical, without processes. Anal tube membranous.��� Female (Fig. 1). Similar to male in coloration and vestiture, but submacropterous (Fig. 2E) and distinctly smaller than male (0.68���0.86 mm) (Tab. 1); tarsal formula 2-2-2. Genitalia (Fig. 6B): well-developed, sclerotized ovipositor formed by interlocked gonapophyses 8 and 9, and styloids; gonapophysis 8 slightly longer than gonapophysis 9, both with sharp apex and without teeth or large setae; styloids represented by six interconnected sclerites median to gonapophysis 8; spermathecal gland small and spherical; spermathecal gland duct straight; spermathecal reservoir large and spherical; spermathecal duct relatively short and very narrow, opening into large spheroid membranous pouch. Etymology. From peritt��s (Greek) meaning ���odd��� to reflect the singular morphology of this phylogenetically isolated taxon and ���nannus��� after the Greek king of the same name (Nannus) and resembling n��nos meaning ���dwarf��� (Greek). The gender is masculine. Distribution. Known from Costa Rica. Notes. The isolated phylogenetic position of Perittonannus gen. n. in the combined molecular and morphological analyses by Knyshov et al. (under revision) are reflected in the singular morphology of this taxon. Perittonannus gen. n. is unique among non-hypselosomatine Schizopteridae in the sinistrally oriented male genitalia, among other genitalic features, and by numerous aspects of the forewing venation. A well-developed ovipositor is rare nonhypselosomatine Schizopteridae and in this case is likely plesiomorphic. Perittonannus antiquus sp. n. urn:lsid:zoobank.org:act: 3CAA6CD1-EDDF-4A1A-B31A-BA5D53C1144A Figures 1, 2D, E, 3 G���I, 6B, 7A Diagnosis. As in generic diagnosis. Description. As in generic description. Measurements. See Table 1. Etymology. According to our phylogenetic analyses, this genus and species represent the earliest diverging lineage of non-hypselosomatine Schizopteridae. The species epithet antiquus meaning ���ancient��� was chosen to reflect this phylogenetic position. Specimens examined. Holotype: COSTA RICA: Heredia: 16 km SSE La Virgen, 10.26666 �� N 84.08333 �� W, 1150 m, 09 Mar 2001 ��� 14 Mar 2001, E. G. Riley, 1;m (UCR _ ENT 00093427) (TAMU). Paratypes: COSTA RICA: Heredia: Sarapiqui Co.: Heredia: La Selva Biol. Station, 10.43 �� N 84.02 �� W, 16 Feb 2002 ��� 17 Feb 2002, B. Brown, L. Gonzales, and K. Walker, 1;m (UCR _ ENT 00022675) (LACM). P.N. Braulio Carrillo, 16 Km SSE La Virgen, 10.26784 �� N 84.084 �� W, 1050 m, 20 Feb 2001 ��� 23 Feb 2001, INBio-OET-ALAS, 2;f (UCR _ ENT 00014571, UCR_ENT 00014572) (INBIO); 23 Feb 2001, INBio-OET-ALAS, 3;f (UCR _ ENT 00014574, UCR_ENT 00014577, UCR_ENT 00014579) (INBIO); 14 Mar 2001 ��� 17 Mar 2001, INBio-OET-ALAS, 1;m (UCR _ ENT 00014814) (INBIO); 17 Mar 2001, INBio-OET-ALAS, 1;m (UCR _ ENT 00014812) (INBIO); 17 Mar 2001, INBio-OET-ALAS, 3;f (UCR _ ENT 00014573, UCR_ENT 00014576, UCR_ENT 00014578) (IN- BIO); 19 Mar 2001 ��� 22 Mar 2001, INBio-OET-ALAS, 1;f (UCR _ ENT 00014570) (INBIO). La Selva, 10.42375 �� N 84.02175 �� W, 15 Feb 2002 ��� 16 Feb 2002, Brown, 2;m (UCR _ ENT 00039260) (LACM). La Selva Biological Station, 10.43333 �� N 84.01667 �� W, 16 May 1992, ALAS, Light Trap, 1;m (UCR _ ENT 00109111) (UCR). Limon: Hamburg Farm, 10.25 �� N 83.45 �� W, Nov 1927, Unknown, 1;m (UCR _ ENT 00096869) (AMNH). Rio Sardinas, R. N.F.S. Barra del Colorado, A.C. Tortuguero, 10.69184 �� N 83.71991 �� W, 50 m, Mar 1994, F. Araya, 2;m (UCR _ ENT 00014810, UCR_ENT 00014809) (INBIO). Unknown: Costa Rica, 9.74277 �� N 83.75944 �� W, 1167 m, no date provided, Unknown, 1;f (UCR _ ENT 00014575), 2;m (UCR _ ENT 00014811, UCR_ENT 00014813) (INBIO). Collecting method and habitat. Specimens were collected using Yellow Pan Traps and Malaise Traps in Isthmian-Atlantic moist forest. One specimen was recorded from ���successional plots��� at La Selva Biological Station, suggesting that specimens may also be found in somewhat disturbed habitats. Rimanannus gen. n. urn:lsid:zoobank.org:act: FC5E7FA1-1477-4663-B66B-450DF7FEF4D1 Figures 1���3, 5C, 7B Type species. Rimanannus camerunensis sp. n. Diagnosis. Distinguished among Schizopteridae by the small size (~ 1 mm), medium-sized eyes, four-segment- ed labium (Fig. 1), distinctive wing feature comprising strongly inflated mid-portion of R and M with slit-like rc giving the appearance of a slender coffee bean (Fig. 2F), long costal fracture reaching to apex of bc, tc with five emanating veins, tarsal formula 2-2-3 (Fig. 3 J-L), male sternum 7 shaped into large subgenital plate, laterotergites 9 present on both sides as free-moving appendages with curved apices, aedeagus with one large heavily sclerotized conjunctival appendage, and vesica short and slender (Fig. 5B). Description. Male: macropterous, suboval, small (~ 1 mm). Coloration (Fig. 1). Body and wings uniformly brown, antenna, labium, and legs pale yellow. Vestiture (Fig. 1). Body and forewing smooth, with relatively few medium-length setae, legs moderately setose. Structure. Head (Fig. 1): short and strongly declivous, synthlipsis ~3 times as wide as eye, eye medium-sized; labium four-segmented, reaching base of middle coxa, first segment inflat- ed, second to fourth moderately stout; antenna with short scape and pedicel (flagellomeres missing). Thorax (Fig. 1): pronotum very broad and short, about a quarter as long as wide, collar distinct, longer medially than laterally, anterior and posterior pronotal lobes not demarcated, posterior margin in dorsal view slightly concave, scutellum with spine-like apex, metathorax without obvious gland evaporatory structures. Forewing (Fig. 2F): macropterous, with fairly broad cc, R with 3 branches, R1 forming proximal margin of costal fracture, distinctive wing feature comprising strongly inflated mid-portion of R and M with slit-like rc giving the appearance of a slender coffee bean (Fig. 2F), long costal fracture reaching to apex of bc, bc slender and elongate, tc suboval with five emanating veins, dc elongate and narrow, cub open distally (An1 not reaching Cu); veins surrounding sc, rc, rc1, and rc2 heavily sclerotized (Fig. 2F). Legs: slender (Fig. 1), fore tibia only slightly expanded at apex 9 Fig. 3J), all tibiae subapically with combs (Fig. 3 J-L), hind tibia with row of short, stout, subadpressed setae and with row of erect, more distantly spaced slender setae with capitate apex (Fig. 3L); tarsal formula 2-2-3 (Fig. 3 J-L), with fore- and middle tarsus slightly incrassate (Fig. 3J, K), hind tarsus more slender (Fig. 3L), first tarsomeres very short, second about five times longer than first on fore- and middle leg, second and third hind leg tarsomeres of similar length; fore- and middle tarsi without bladderlike arolium (Fig. 3J, EK), parempodia with tapering apex (Fig. 3L). Abdomen and genitalia (Fig. 5C): pregenital abdomen fairly symmetrical; spiracles located on sterna 6 and 7, and on mediotergite 8; DAG scars minute, located on sides of anterior margin of mediotergite 7 and obscured by mediotergite 6; sternum 7 shaped into subgenital plate, completely covering pygophore from beneath; mediotergite 8 without processes; laterotergites 9 present on both sides as free-moving appendages with curved apices; aedeagus with complex middle portion with tentatively one large heavily sclerotized conjunctival appendage; vesica relatively short and slender, with minute serration near apex; right paramere elongate, L-shaped, with rounded apex; left paramere as long as wide, with rounded apex; anophore sclerotized, devoid of processes. Female. Unknown. Etymology. ���Rima��� from rima (Latin) meaning ���crack, crevice��� for the distinctively inflated R and M portion surrounding the slit-like rc and and ���nannus��� after the Greek king of the same name (Nannus) and resembling n��nos meaning ���dwarf��� (Greek). The gender is masculine. Distribution. Known from two sites in the western part of Cameroon, Mt. Cameroon and Korup National Park. Notes. See under Kamakonocoris gen. n. for discussion of phylogenetic relationship. Rimanannus camerunensis sp. n. urn:lsid:zoobank.org:act: 1D8BCF9E-76A3-475C-895B-6EC1AA79B060 Figures 1, 2F, 3 J���L, 5C, 7B Diagnosis. As in generic diagnosis. Description. As in generic description. Measurements. See Table 1. Etymology. This species is named for its country of origin. Specimens examined. Holotype: CAMEROON: Southwest: Korup National Park, nature trail, 5.00833 �� N 8.86944 �� E, 93 m, 30 Aug 2013 ��� 31 Aug 2013, Forthman, Gordon, Heraty & Weirauch, 1;m (UCR _ ENT 00088644) (UCR). Paratypes: CAMEROON: Southwest: Korup National Park, nature trail, 5.00833 �� N 8.86944 �� E, 93 m, 28 Aug 2013 ��� 30 Aug 2013, Forthman, Gordon, Heraty & Weirauch, 2;m (UCR_ENT 00088115, UCR_ENT 00088116) (UCR). Mt. Cameroon, 4.1175 �� N 9.0716 �� E, 1079 m, 28 Dec 2015, V. Grebennikov, 2;m (UCR_ENT 00127864, UCR_ENT 00127865) (CNC). ~ 8 km N of Mundemba, toward Toko, 4.99994 �� N 8.96401 �� E, 03 Sep 2013, Forthman, Gordon, Heraty & Weirauch, 1;m (UCR_ENT 00087547;ED_2203) (UCR). Collecting method and habitat. Specimens were collected using Yellow Pan Traps in Cross-Sanaga-Bioko coastal forests, a tropical moist broadleaf forest ecoregion of west-central Africa, and from sifting leaf litter in Mount Cameroon and Bioko montane forests., Published as part of Weirauch, Christiane, Knyshov, Alexander & Hoey-Chamberlain, Rochelle, 2020, Four new genera of Schizopteridae (Hemiptera: Heteroptera) from theAfrotropical and Neotropical regions, pp. 95-111 in Zootaxa 4768 (1) on pages 106-110, DOI: 10.11646/zootaxa.4768.1.6, http://zenodo.org/record/3777888, {"references":["Knyshov, A., Hoey-Chamberlain, R. & Weirauch, C. (2018) Comparative morphology of male genitalic structures in the minute litter bugs Dipsocoromorpha (Insecta: Hemiptera: Heteroptera). Journal of Morphology, 279, 1480 - 1517. https: // doi. org / 10.1002 / jmor. 20885"]}

Despite a recent surge of taxonomic work on the dipsocoromorphan family Schizopteridae, new genus-level taxa remain to be documented and described. The curation of Malaise and Yellow Pan Trap sample residues from Central and South America and Cameroon resulted in the discovery of five undescribed species that based on combined molecular and morphological phylogenetic analyses represent four phylogenetically isolated lineages within non-hypselosomatine Schizopteridae. To accommodate these new species, we here describe the four new genera Caucanannus gen. n. (Colombia, Ecuador, and Brazil) with Caucanannus perplexus sp. n. and Caucanannus novissimis sp. n.; Kamakonocoris gen. n. (Cameroon) with Kamakonocoris carinata sp. n.; Perittonannus gen. n. (Costa Rica) with Perittonannus antiquus sp. n.; and Rimanannus gen. n. (Cameroon) with Rimanannus camerunensis sp. n. The four genera are characterized by distinctive wing venation and male and female genitalic features. We provide habitus photographs and document morphological details using digital macrophotography as well as light compound microscopic and scanning electron microscopic images. Maps and measurements are also included.

Hoplonannus australis Silveira and Knyshov sp. nov. (Figs. 1���14) Diagnosis. Male and female submacropterous, both bearing ocelli. General colour castaneous. Hemelytra with second discal cell rectangular and discal cell pentagonal. Hind wings with anal margin angulate; jugal lobe absent. Male genitalia exhibiting dextral asymmetry; eighth tergite with a lanceolate process, reaching the base of the aedeagus. Anophoric process very long, tapering distally. Right paramere branching near apex, branches subparallel. Female with a prominent basal bulge at the base of seventh sternite; ninth tergite mesially notched; female ovipositor vestigial. Description. Male. Color (Figs. 1���3). Head and scutellum dark castaneous, thorax castaneous, lighter than head. Abdominal tergites light yellow, sternites light castaneous. Legs light yellow, with darker tarsi. Hemelytra: corium castaneous, membrane light yellow. Head. Declivent, ocelli present (Fig. 3). Paired macrosetae close to ocular region. Scape and pedicel each with less than one fourth the length of each flagellomere. Flagellomeres I and II straight, of the same length; setae long and thin present on apical half of I and along entire II, become longer towards apex of antenna. Labium surpassing first pair of legs, not reaching the second; segment III apically truncate; segments ratio 2:1:2 (Fig. 7). Thorax. Pronotum without collar, with scattered setae all over the disc, posterior margin slightly convex. Scutellum about half the length of the pronotum, anterior margin slightly sinuate. Femora with scarce setae along all their length; tibiae with two lateral rows of setae; tarsal formula 3-3-3. Hemelytra with second discal cell rectangular and discal cell pentagonal (Fig. 8). Hind wings with anal margin angulate (Fig. 9). Abdomen. Seventh segment asymmetric, produced unilaterally in a short process (Fig. 1); eighth tergite bearing a moderately long, lanceolate process, reaching the base of the aedeagus. Genital capsule broadly visible dorsally, exhibiting dextral asymmetry (Fig. 10). Anophoric process very long, tapering distally. Right paramere long and branched apically, branches subparallel. Left paramere about half the length of right paramere. Aedeagus short, not completing a whole turn around right paramere. Measurements (mm). Total length 1.2; Head length 0.1; interocular distance 0.4; antennal segments length I, 0.08; II, 0.08, III, 0.3; IV, 0.3; pronotum length 0.2; pronotum width 0.4; scutellum length 0.08; hemelytra length 0.8; abdominal width 0.6. Female. Submacropterous (Figs. 4���6), similar to the male, except by the tarsal formula 3-2-2 and the abdominal segments symmetric. Seventh sternite with a basal bulge and two posterior projections (Figs. 5���6). Tergite 9 with a mesial notch. Ovipositor reduced, gonapophyses 8 very thin, long, and curved, widely separated at base, gonapophyses 9 thin, short, and straight, also widely separated at base, but close to each other at apex. Gonapophyses 8 and 9 not interlocking. Spermatheca located on right side of segment 8, spermathecal duct relatively short, straight, and narrow, spermathecal reservoir very narrow, roughly similar in size to spermathecal gland (Figs. 11���14). Remarks. This is the first species of Hoplonannus described from continental South America. Submacroptery and ocelli in females might be related to a more active habit, and are novel features for the genus (Table I). Also, the process of eighth tergite in males, mentioned as absent by Emsley (1969), is described for the first time in Hoplonannus. In her key to genera of the Corixidea genus group, Weirauch (2012) uses the supposed absence of this process in Hoplonannus, besides other traits, to distinguish from Voragocoris. However, the process exhibited for Hoplonannus australis sp. nov. is much longer and more lateral than the described and illustrated for Voragocoris Weirauch, while it is markedly shorter than in Corixidea. Possible homology hypotheses require further testing. A revision and cladistic analysis of all the genera of the Corixidea genus group is in preparation by the third author. Material examined. Holotype ♂: BRAZIL, Rio Grande do Sul, Sant���ana do Livramento, 17.v.2012, R. Ott, I. Heydrich, M. Pairet, E. Velinho (MCNZ). Paratypes: 2 ♂, 3 ♀, same local of the holotype, 15.xi.2012, same collectors (MCNZ); 1 ♀, same data (USNM); 2 ♀, same local, 14.xi.2012, same collectors (MCNZ); 1 ♂, same data (USNM); 1 ♀, same local, 14��� 16.viii.2012, same collectors (MCNZ); 1 ♀, same local, 16���18.viii.2012, same collectors (MCNZ); 45 ♂, 3 ♀, ARGENTINA, Misiones Province, Candelaria Dept., Loreto, Ruinas Jesuiticas, 21���24.viii.2000, P. Fidalgo (UCR); 5 ♂, same collection event (MLPA); 27 ♂, same locality, 23.viii.2000, same collector (UCR); 5 ♂, same collection event (MLPA); 5 ♀, same locality, 25.viii.2000, same collector (UCR); 2 ♀, same collection event (MLPA); 1 ♀, PARAGUAY, Alto Parana Province, 1984?, uncertain collector (MHNG); 2 ♂, 6 ♀, URUGUAY, Tacuarembo Dept., 40 km NW of Tacuarembo, 11���26.xii.2002, S. B. Peck (FMNH). TABLE I. Diagnostic traits among species of Hoplonannus., Published as part of Silveira, Diego Dutra, Barcellos, Aline & Knyshov, Alexander, 2019, Hoplonannus australis sp. nov. (Hemiptera, Schizopteridae): amended diagnosis of the genus and first record from South America, pp. 394-400 in Zootaxa 4568 (2) on pages 395-400, DOI: 10.11646/zootaxa.4568.2.13, http://zenodo.org/record/2599406

Hoplonannus australis Silveira and Knyshov sp. nov. (Figs. 1–14) Diagnosis. Male and female submacropterous, both bearing ocelli. General colour castaneous. Hemelytra with second discal cell rectangular and discal cell pentagonal. Hind wings with anal margin angulate; jugal lobe absent. Male genitalia exhibiting dextral asymmetry; eighth tergite with a lanceolate process, reaching the base of the aedeagus. Anophoric process very long, tapering distally. Right paramere branching near apex, branches subparallel. Female with a prominent basal bulge at the base of seventh sternite; ninth tergite mesially notched; female ovipositor vestigial. Description. Male. Color (Figs. 1–3). Head and scutellum dark castaneous, thorax castaneous, lighter than head. Abdominal tergites light yellow, sternites light castaneous. Legs light yellow, with darker tarsi. Hemelytra: corium castaneous, membrane light yellow. Head. Declivent, ocelli present (Fig. 3). Paired macrosetae close to ocular region. Scape and pedicel each with less than one fourth the length of each flagellomere. Flagellomeres I and II straight, of the same length; setae long and thin present on apical half of I and along entire II, become longer towards apex of antenna. Labium surpassing first pair of legs, not reaching the second; segment III apically truncate; segments ratio 2:1:2 (Fig. 7). Thorax. Pronotum without collar, with scattered setae all over the disc, posterior margin slightly convex. Scutellum about half the length of the pronotum, anterior margin slightly sinuate. Femora with scarce setae along all their length; tibiae with two lateral rows of setae; tarsal formula 3-3-3. Hemelytra with second discal cell rectangular and discal cell pentagonal (Fig. 8). Hind wings with anal margin angulate (Fig. 9). Abdomen. Seventh segment asymmetric, produced unilaterally in a short process (Fig. 1); eighth tergite bearing a moderately long, lanceolate process, reaching the base of the aedeagus. Genital capsule broadly visible dorsally, exhibiting dextral asymmetry (Fig. 10). Anophoric process very long, tapering distally. Right paramere long and branched apically, branches subparallel. Left paramere about half the length of right paramere. Aedeagus short, not completing a whole turn around right paramere. Measurements (mm). Total length 1.2; Head length 0.1; interocular distance 0.4; antennal segments length I, 0.08; II, 0.08, III, 0.3; IV, 0.3; pronotum length 0.2; pronotum width 0.4; scutellum length 0.08; hemelytra length 0.8; abdominal width 0.6. Female. Submacropterous (Figs. 4–6), similar to the male, except by the tarsal formula 3-2-2 and the abdominal segments symmetric. Seventh sternite with a basal bulge and two posterior projections (Figs. 5–6). Tergite 9 with a mesial notch. Ovipositor reduced, gonapophyses 8 very thin, long, and curved, widely separated at base, gonapophyses 9 thin, short, and straight, also widely separated at base, but close to each other at apex. Gonapophyses 8 and 9 not interlocking. Spermatheca located on right side of segment 8, spermathecal duct relatively short, straight, and narrow, spermathecal reservoir very narrow, roughly similar in size to spermathecal gland (Figs. 11–14). Remarks. This is the first species of Hoplonannus described from continental South America. Submacroptery and ocelli in females might be related to a more active habit, and are novel features for the genus (Table I). Also, the process of eighth tergite in males, mentioned as absent by Emsley (1969), is described for the first time in Hoplonannus. In her key to genera of the Corixidea genus group, Weirauch (2012) uses the supposed absence of this process in Hoplonannus, besides other traits, to distinguish from Voragocoris. However, the process exhibited for Hoplonannus australis sp. nov. is much longer and more lateral than the described and illustrated for Voragocoris Weirauch, while it is markedly shorter than in Corixidea. Possible homology hypotheses require further testing. A revision and cladistic analysis of all the genera of the Corixidea genus group is in preparation by the third author. Material examined. Holotype ♂: BRAZIL, Rio Grande do Sul, Sant’ana do Livramento, 17.v.2012, R. Ott, I. Heydrich, M. Pairet, E. Velinho (MCNZ). Paratypes: 2 ♂, 3 ♀, same local of the holotype, 15.xi.2012, same collectors (MCNZ); 1 ♀, same data (USNM); 2 ♀, same local, 14.xi.2012, same collectors (MCNZ); 1 ♂, same data (USNM); 1 ♀, same local, 14– 16.viii.2012, same collectors (MCNZ); 1 ♀, same local, 16–18.viii.2012, same collectors (MCNZ); 45 ♂, 3 ♀, ARGENTINA, Misiones Province, Candelaria Dept., Loreto, Ruinas Jesuiticas, 21–24.viii.2000, P. Fidalgo (UCR); 5 ♂, same collection event (MLPA); 27 ♂, same locality, 23.viii.2000, same collector (UCR); 5 ♂, same collection event (MLPA); 5 ♀, same locality, 25.viii.2000, same collector (UCR); 2 ♀, same collection event (MLPA); 1 ♀, PARAGUAY, Alto Parana Province, 1984?, uncertain collector (MHNG); 2 ♂, 6 ♀, URUGUAY, Tacuarembo Dept., 40 km NW of Tacuarembo, 11–26.xii.2002, S. B. Peck (FMNH). TABLE I. Diagnostic traits among species of Hoplonannus.

Meganannus gen. n. HTTP://ZOObANK.ORG/NOMENCLATURALACTS/D0D0B8EE-AE09-4653-9803-05501E3A5CD5 FIGURES 2–10 TypE spEciEs. Meganannus lewisi sp. n. Diagnosis. DISTINGUISHED AMONG SCHIZOPTERIDAE bY THE LARGE bODY SIZE (~2.2MM), EYES AbOUT 1/3 AS WIDE AS SYNTHLIPSIS (FIG. 3A), LAbIUM SHORT, NOT SURPASSING MIDDLE COXA (FIG. 3B) AND FOUR-SEGMENTED (FIG. 5A), FOREWING WITH 3 CLOSED SUbMARGINAL CELLS (FIG. 3E; CELLS DELIMITED bY R AND M, M AND CU, AND CU AND 1AN), SUbCOSTAL CELL (DELIMITED bY C+SC AND R/R+M) LONG AND NARROW, WITH bASAL THREE QUARTERS OF C+SC MARGIN WIDENED AND THICKENED AND DISTAL QUARTER NARROW, TRANSITION bETWEEN THE TWO SECTIONS MARKED bY NOTCH IN THE WING MARGIN AND PALE COLOR PATCH, TRAPEZOIDAL CELL WITH FIVE EMANATING VEINS, 1AN REACHING MARGIN OF WING, TARSAL FORMULA IN MALES 3-3-3, OVIPOSITOR WELL DEVELOPED. Description. Male: MACROPTEROUS, WITH bOTH PAIRS OF WINGS SURPASSING TIP OF AbDOMEN, ELONGATE OVOID, LARGE (~2.2MM). Coloration (FIG. 2A–C). HEAD DARK bROWN WITH RED EYES, YELLOWISH LAbIUM, YELLOWISH SCAPE AND PEDICEL AND LIGHT bROWN FLAGELLOMERES, THORAX AND AbDOMEN DARK bROWN, FOREWING WITH PATTERN OF DARK AND LIGHT YELLOWISH bROWN; LEGS YELLOWISH. Surface and Vestiture. HEAD EXCEPT CLYPEUS, bUCCULA, LAbRUM, LAbIUM, AND ANTENNA (FIGS 3A, 5A) AND THORAX (FIGS 3C, 5G) WITH DENSE COVER OF MICROTRICHIA AND EVENLY SPACED, FAIRLY SHORT, CURVED SETAE; LAbIUM, SCAPE AND PEDICEL, AND LEGS GLAbROUS WITH LONG, STOUT SETAE (FIG. 5A, B); FLAGELLOMERES WITH VERY LONG SETAE (FIG. 2A); FORETIbIA WITH 2–3 STOUT AND LONG SPINE-LIKE SETAE ON POSTERIOR MARGIN; HIND TARSUS WITH ROW OF SLENDER, ERECT, CAPITATE SETAE ON POSTEROLATERAL SURFACE (FIG. 4B); FOREWING VEINS WITH SHORT, CURVED SETAE (FIG. 3C, D); VENTRAL SURFACE OF AbDOMEN DENSELY COVERED WITH MIX OF SHORT AND LONGER SETAE (FIG. 6H). Structure. Head: ALMOST TRIANGULAR IN FRONTAL VIEW (FIG. 3A), SYNTHLIPSIS AbOUT 3 TIMES AS WIDE AS EYE, EYE SMALL, SEMICIRCULAR IN FRONTAL VIEW, ALMOST CIRCULAR IN LATERAL VIEW; bUCCULA FORMING RING AROUND bASE OF LAbIUM, MAXILLARY PLATE DISTINCT AND COVERED WITH MICROTRICHIA, MANDIbULAR PLATE NOT IDENTIFIAbLE, CLYPEUS SLENDER (FIG. 5A), ONLY SLIGHTLY RAISED AbOVE LEVEL OF GENA (FIG. 5B); LAbIUM REACHING MID COXA, FIRST SEGMENT bULbOUS (FIG. 5A), SECOND SEGMENT SLENDER, THIRD AND FOURTH SEGMENTS TAPERING, TOGETHER AbOUT AS LONG AS SECOND SEGMENT (FIG. 5A); ANTENNA WITH SHORT SCAPE AND PEDICEL AND LONG FLAGELLOMERES (FIG. 2A, B). Thorax: WITH PRONOTUM AbOUT HALF AS LONG AS WIDE, LATERAL MARGIN CONVEX, HUMERAL ANGLE ROUNDED, POSTERIOR MARGIN IN DORSAL VIEW SLOPING TO LATERAL MARGIN OF SCUTELLUM AND WITH SLIGHTLY INDENTED MEDIAN PART bORDERING SCUTELLUM, PRONOTAL COLLAR bROAD (FIG. 2A), PRONOTUM IN LATERAL VIEW SINUOUS (FIG 2C), METATHORAX WITHOUT ObVIOUS GLAND EVAPORATORY STRUCTURES, METEPIMERAL SUPRACOXAL LObE ROUNDED. Legs: LONG AND SLENDER, FORE TIbIA ONLY SLIGHTLY EXPANDED AT APEX (FIG. 5B), TIbIAL COMb PRESENT, TARSAL FORMULA 3-3- 3 (FIG. 5C, E, H), WITH FORE- AND MIDTARSUS SHORT AND INCRASSATE (FIG. 5E), HINDTARSUS SLENDER (FIG. 5H), FIRST TARSOMERE VERY SHORT, SECOND AND THIRD SUbEQUAL (FIG. 5E, H), PRETARSUS WITH AROLIUM ON FORE- AND MIDLEG (FIG. 5D), WITH DORSAL SCLERITE AND VENTRAL MEMbRANOUS LObE; VENTRAL CLAW SURFACE WITH ROW OF STRONG, POINTED PROCESSES (FIG. 5F), SIMILAR TO SITUATION IN Carinatala (HILL 2015). Forewing: FOREWING WITH 3 CLOSED SUbMARGINAL CELLS (FIG. 2; CELLS DELIMITED bY R AND M, M AND CU, CU AND 1 AN), SUbCOSTAL CELL DELIMITED bY C+SC AND R/R+M LONG AND NARROW, WITH bASAL THREE QUARTES OF C+SC MARGIN WIDENED AND THICKENED AND DISTAL QUARTER NARROW, TRANSITION bETWEEN THE TWO SECTIONS MARKED bY NOTCH IN WING MARGIN (FIG. 3E), R DISTINCTLY RAISED PROXIMALLY TO LEVEL OF NOTCH, bASAL CELL NARROW AND ELONGATE, AbOUT TWICE AS LONG AS TRAPEZOIDAL CELL, TRAPEZOIDAL CELL WITH FIVE EMANATING VEINS, RADIAL CELL SLIGHTLY WIDER AND SHORTER THAN DISCAL CELL, DISCAL CELL SLIGHTLY EXPANDED DISTALLY, CUbITAL CELL LARGE, LONG, AND CURVED, 1 AN REACHING MARGIN OF WING, CORIUM (I.E. AREA SLIGHTLY MORE HEAVILY SCLEROTIZED COMPARED TO THE DISTAL MEMbRANOUS PART OF THE WING) RESTRICTED TO WIDENED AND RAISED PROXIMAL PARTS OF C+SC, R+M, CU, 1 AN AND 2 AN, REMAINDER OF FOREWING MEMbRANOUS. Abdomen and genitalia: PREGENITAL AbDOMEN FAIRLY SYMMETRICAL EXCEPT ENLARGED RIGHT SIDE OF STERNITES 2+3 AND SEGMENT 4 WITH POUCH-LIKE MODIFICATION ON RIGHT SIDE OF SEGMENT (FIGS 6H, 9A); SPIRACLES LOCATED ON STERNITES 6 AND 7 (FIG. 9A), AND ON LATERAL PROjECTIONS OF TERGITE 8 (FIGS 7E, 9A); SCARS OF DORSAL AbDOMINAL GLANDS PRESENT ON TERGITE 7; STERNITE 7 LARGE (FIG. 4B); TERGITE 8 WITH LONG APPENDAGE (FIGS 6B, C, E, F,H, 7E, 8A, D); AEDEAGUS (FIG. 8C) WITH bASAL PLATES, COMPLEX MIDDLE PORTION WITH LARGE HEAVILY SCLEROTIZED CONjUNCTIVAL APPENDAGE (FIGS 6B, 8A, 8C), AND LONG, THIN VESICA WITH 8 TO 9 COILS (FIGS 6I, 8A), RIGHT PARAMERE ELONGATE, SLENDER, AND SINUOUS (FIGS 6E, G, 7B), LEFT PARAMERE AbOUT HALF AS LONG AS WIDE WITH TAPERING PROCESS (FIG. 7C); ANOPHORIC PROCESS LONG AND RELATIVELY WIDE, ORIENTED ANTERIAD, WITH SEVERAL RIDGES AND FOLDS (FIGS 6A, H, 8A, B). Female. SIMILAR TO MALE IN COLORATION, SURFACE AND VESTITURE, SLIGHTLY LARGER THAN MALE (~2.3–2.5MM), TARSAL FORMULA 2-2-3, AROLIA AbSENT ON FORE- AND MIDTARSI, FORE- AND MIDTARSI SOMEWHAT MORE SLENDER THAN IN MALE, DISTINCTLY STOUTER AND SHORTER THAN HINDTARSUS. Genitalia: OVIPOSITOR FORMED bY INTERLOCKED GONAPOPHYSES 8 AND 9, AND STYLOIDS; GONAPOPHYSIS 8 WITH SEVERAL SPINE-LIKE SETAE (FIGS 7A, 9B, C), GONAPOPHYSIS 9 VERY SLENDER WITH WIDENED APEX; STYLOIDS REPRESENTED bY FOUR SCLERITES MEDIAN TO GONAPOPHYSIS 8 IN FIG. 9B; SPERMATHECAL GLAND SPHERICAL; SPERMATHECAL GLAND DUCT STRAIGHT; SPERMATHECAL RESERVOIR ELONGATE; SPERMATHECAL DUCT VERY LONG AND COILED (FIG. 9B, C). Etymology. “ MEGA ” FROM MÉGAS (GREEK) MEANING GREAT OR LARGE, AND “NANNUS” AFTER THE GREEK KING OF THE SAME NAME (NANNUS) AND RESEMbLING NâNOS MEANING “ DWARF ” (GREEK). THE GENDER IS MASCULINE. Distribution. KNOWN FROM COSTA RICA AND PERU. Notes. IN ADDITION TO THE SPECIES FROM COSTA RICA DESCRIbED bELOW, WE HAVE RECOVERED ONE FEMALE SPECIMEN FROM PERU FROM SWEEP SAMPLES HELD IN THE HERATY LAb AT UCR (PERU: MADRE DE DIOS: LOS AMIGOS BIOL. STA. TRAIL 13, 12.57138°S 70.09616°W, 226 m, 27 Dec 2010, J. Heraty, 1♀; UCR _ ENT 00077887). Based on difference in COLOR PATTERN OF FEMALES FROM COSTA RICA AND THE SINGLETON FEMALE FROM PERU (FIG. 2; ALSO PARTIALLY DUE TO THE FACT THAT SPECIMENS WERE IMAGED DRY OR IN ETHANOL, RESPECTIVELY) AS WELL AS THE GEOGRAPHIC DISTANCES bETWEEN THE COLLECTING LOCALITIES, WE SUSPECT THAT THESE FEMALES MAY REPRESENT DIFFERENT SPECIES. GIVEN THE IMPORTANCE OF MALE GENITALIC CHARACTERS FOR SPECIES DIAGNOSIS AND IDENTIFICATION IN MOST SCHIZOPTERIDAE, WE REFRAIN FROM DESCRIbING THE SINGLE FEMALE SPECIMENS FROM PERU.

Meganannus gen. n. HTTP://ZOObANK.ORG/NOMENCLATURALACTS/D0D0B8EE-AE09-4653-9803-05501E3A5CD5 FIGURES 2���10 TypE spEciEs. Meganannus lewisi sp. n. Diagnosis. DISTINGUISHED AMONG SCHIZOPTERIDAE bY THE LARGE bODY SIZE (~2.2MM), EYES AbOUT 1/3 AS WIDE AS SYNTHLIPSIS (FIG. 3A), LAbIUM SHORT, NOT SURPASSING MIDDLE COXA (FIG. 3B) AND FOUR-SEGMENTED (FIG. 5A), FOREWING WITH 3 CLOSED SUbMARGINAL CELLS (FIG. 3E; CELLS DELIMITED bY R AND M, M AND CU, AND CU AND 1AN), SUbCOSTAL CELL (DELIMITED bY C+SC AND R/R+M) LONG AND NARROW, WITH bASAL THREE QUARTERS OF C+SC MARGIN WIDENED AND THICKENED AND DISTAL QUARTER NARROW, TRANSITION bETWEEN THE TWO SECTIONS MARKED bY NOTCH IN THE WING MARGIN AND PALE COLOR PATCH, TRAPEZOIDAL CELL WITH FIVE EMANATING VEINS, 1AN REACHING MARGIN OF WING, TARSAL FORMULA IN MALES 3-3-3, OVIPOSITOR WELL DEVELOPED. Description. Male: MACROPTEROUS, WITH bOTH PAIRS OF WINGS SURPASSING TIP OF AbDOMEN, ELONGATE OVOID, LARGE (~2.2MM). Coloration (FIG. 2A���C). HEAD DARK bROWN WITH RED EYES, YELLOWISH LAbIUM, YELLOWISH SCAPE AND PEDICEL AND LIGHT bROWN FLAGELLOMERES, THORAX AND AbDOMEN DARK bROWN, FOREWING WITH PATTERN OF DARK AND LIGHT YELLOWISH bROWN; LEGS YELLOWISH. Surface and Vestiture. HEAD EXCEPT CLYPEUS, bUCCULA, LAbRUM, LAbIUM, AND ANTENNA (FIGS 3A, 5A) AND THORAX (FIGS 3C, 5G) WITH DENSE COVER OF MICROTRICHIA AND EVENLY SPACED, FAIRLY SHORT, CURVED SETAE; LAbIUM, SCAPE AND PEDICEL, AND LEGS GLAbROUS WITH LONG, STOUT SETAE (FIG. 5A, B); FLAGELLOMERES WITH VERY LONG SETAE (FIG. 2A); FORETIbIA WITH 2���3 STOUT AND LONG SPINE-LIKE SETAE ON POSTERIOR MARGIN; HIND TARSUS WITH ROW OF SLENDER, ERECT, CAPITATE SETAE ON POSTEROLATERAL SURFACE (FIG. 4B); FOREWING VEINS WITH SHORT, CURVED SETAE (FIG. 3C, D); VENTRAL SURFACE OF AbDOMEN DENSELY COVERED WITH MIX OF SHORT AND LONGER SETAE (FIG. 6H). Structure. Head: ALMOST TRIANGULAR IN FRONTAL VIEW (FIG. 3A), SYNTHLIPSIS AbOUT 3 TIMES AS WIDE AS EYE, EYE SMALL, SEMICIRCULAR IN FRONTAL VIEW, ALMOST CIRCULAR IN LATERAL VIEW; bUCCULA FORMING RING AROUND bASE OF LAbIUM, MAXILLARY PLATE DISTINCT AND COVERED WITH MICROTRICHIA, MANDIbULAR PLATE NOT IDENTIFIAbLE, CLYPEUS SLENDER (FIG. 5A), ONLY SLIGHTLY RAISED AbOVE LEVEL OF GENA (FIG. 5B); LAbIUM REACHING MID COXA, FIRST SEGMENT bULbOUS (FIG. 5A), SECOND SEGMENT SLENDER, THIRD AND FOURTH SEGMENTS TAPERING, TOGETHER AbOUT AS LONG AS SECOND SEGMENT (FIG. 5A); ANTENNA WITH SHORT SCAPE AND PEDICEL AND LONG FLAGELLOMERES (FIG. 2A, B). Thorax: WITH PRONOTUM AbOUT HALF AS LONG AS WIDE, LATERAL MARGIN CONVEX, HUMERAL ANGLE ROUNDED, POSTERIOR MARGIN IN DORSAL VIEW SLOPING TO LATERAL MARGIN OF SCUTELLUM AND WITH SLIGHTLY INDENTED MEDIAN PART bORDERING SCUTELLUM, PRONOTAL COLLAR bROAD (FIG. 2A), PRONOTUM IN LATERAL VIEW SINUOUS (FIG 2C), METATHORAX WITHOUT ObVIOUS GLAND EVAPORATORY STRUCTURES, METEPIMERAL SUPRACOXAL LObE ROUNDED. Legs: LONG AND SLENDER, FORE TIbIA ONLY SLIGHTLY EXPANDED AT APEX (FIG. 5B), TIbIAL COMb PRESENT, TARSAL FORMULA 3-3- 3 (FIG. 5C, E, H), WITH FORE- AND MIDTARSUS SHORT AND INCRASSATE (FIG. 5E), HINDTARSUS SLENDER (FIG. 5H), FIRST TARSOMERE VERY SHORT, SECOND AND THIRD SUbEQUAL (FIG. 5E, H), PRETARSUS WITH AROLIUM ON FORE- AND MIDLEG (FIG. 5D), WITH DORSAL SCLERITE AND VENTRAL MEMbRANOUS LObE; VENTRAL CLAW SURFACE WITH ROW OF STRONG, POINTED PROCESSES (FIG. 5F), SIMILAR TO SITUATION IN Carinatala (HILL 2015). Forewing: FOREWING WITH 3 CLOSED SUbMARGINAL CELLS (FIG. 2; CELLS DELIMITED bY R AND M, M AND CU, CU AND 1 AN), SUbCOSTAL CELL DELIMITED bY C+SC AND R/R+M LONG AND NARROW, WITH bASAL THREE QUARTES OF C+SC MARGIN WIDENED AND THICKENED AND DISTAL QUARTER NARROW, TRANSITION bETWEEN THE TWO SECTIONS MARKED bY NOTCH IN WING MARGIN (FIG. 3E), R DISTINCTLY RAISED PROXIMALLY TO LEVEL OF NOTCH, bASAL CELL NARROW AND ELONGATE, AbOUT TWICE AS LONG AS TRAPEZOIDAL CELL, TRAPEZOIDAL CELL WITH FIVE EMANATING VEINS, RADIAL CELL SLIGHTLY WIDER AND SHORTER THAN DISCAL CELL, DISCAL CELL SLIGHTLY EXPANDED DISTALLY, CUbITAL CELL LARGE, LONG, AND CURVED, 1 AN REACHING MARGIN OF WING, CORIUM (I.E. AREA SLIGHTLY MORE HEAVILY SCLEROTIZED COMPARED TO THE DISTAL MEMbRANOUS PART OF THE WING) RESTRICTED TO WIDENED AND RAISED PROXIMAL PARTS OF C+SC, R+M, CU, 1 AN AND 2 AN, REMAINDER OF FOREWING MEMbRANOUS. Abdomen and genitalia: PREGENITAL AbDOMEN FAIRLY SYMMETRICAL EXCEPT ENLARGED RIGHT SIDE OF STERNITES 2+3 AND SEGMENT 4 WITH POUCH-LIKE MODIFICATION ON RIGHT SIDE OF SEGMENT (FIGS 6H, 9A); SPIRACLES LOCATED ON STERNITES 6 AND 7 (FIG. 9A), AND ON LATERAL PROjECTIONS OF TERGITE 8 (FIGS 7E, 9A); SCARS OF DORSAL AbDOMINAL GLANDS PRESENT ON TERGITE 7; STERNITE 7 LARGE (FIG. 4B); TERGITE 8 WITH LONG APPENDAGE (FIGS 6B, C, E, F,H, 7E, 8A, D); AEDEAGUS (FIG. 8C) WITH bASAL PLATES, COMPLEX MIDDLE PORTION WITH LARGE HEAVILY SCLEROTIZED CONjUNCTIVAL APPENDAGE (FIGS 6B, 8A, 8C), AND LONG, THIN VESICA WITH 8 TO 9 COILS (FIGS 6I, 8A), RIGHT PARAMERE ELONGATE, SLENDER, AND SINUOUS (FIGS 6E, G, 7B), LEFT PARAMERE AbOUT HALF AS LONG AS WIDE WITH TAPERING PROCESS (FIG. 7C); ANOPHORIC PROCESS LONG AND RELATIVELY WIDE, ORIENTED ANTERIAD, WITH SEVERAL RIDGES AND FOLDS (FIGS 6A, H, 8A, B). Female. SIMILAR TO MALE IN COLORATION, SURFACE AND VESTITURE, SLIGHTLY LARGER THAN MALE (~2.3���2.5MM), TARSAL FORMULA 2-2-3, AROLIA AbSENT ON FORE- AND MIDTARSI, FORE- AND MIDTARSI SOMEWHAT MORE SLENDER THAN IN MALE, DISTINCTLY STOUTER AND SHORTER THAN HINDTARSUS. Genitalia: OVIPOSITOR FORMED bY INTERLOCKED GONAPOPHYSES 8 AND 9, AND STYLOIDS; GONAPOPHYSIS 8 WITH SEVERAL SPINE-LIKE SETAE (FIGS 7A, 9B, C), GONAPOPHYSIS 9 VERY SLENDER WITH WIDENED APEX; STYLOIDS REPRESENTED bY FOUR SCLERITES MEDIAN TO GONAPOPHYSIS 8 IN FIG. 9B; SPERMATHECAL GLAND SPHERICAL; SPERMATHECAL GLAND DUCT STRAIGHT; SPERMATHECAL RESERVOIR ELONGATE; SPERMATHECAL DUCT VERY LONG AND COILED (FIG. 9B, C). Etymology. ��� MEGA ��� FROM M��GAS (GREEK) MEANING GREAT OR LARGE, AND ���NANNUS��� AFTER THE GREEK KING OF THE SAME NAME (NANNUS) AND RESEMbLING N��NOS MEANING ��� DWARF ��� (GREEK). THE GENDER IS MASCULINE. Distribution. KNOWN FROM COSTA RICA AND PERU. Notes. IN ADDITION TO THE SPECIES FROM COSTA RICA DESCRIbED bELOW, WE HAVE RECOVERED ONE FEMALE SPECIMEN FROM PERU FROM SWEEP SAMPLES HELD IN THE HERATY LAb AT UCR (PERU: MADRE DE DIOS: LOS AMIGOS BIOL. STA. TRAIL 13, 12.57138��S 70.09616��W, 226 m, 27 Dec 2010, J. Heraty, 1♀; UCR _ ENT 00077887). Based on difference in COLOR PATTERN OF FEMALES FROM COSTA RICA AND THE SINGLETON FEMALE FROM PERU (FIG. 2; ALSO PARTIALLY DUE TO THE FACT THAT SPECIMENS WERE IMAGED DRY OR IN ETHANOL, RESPECTIVELY) AS WELL AS THE GEOGRAPHIC DISTANCES bETWEEN THE COLLECTING LOCALITIES, WE SUSPECT THAT THESE FEMALES MAY REPRESENT DIFFERENT SPECIES. GIVEN THE IMPORTANCE OF MALE GENITALIC CHARACTERS FOR SPECIES DIAGNOSIS AND IDENTIFICATION IN MOST SCHIZOPTERIDAE, WE REFRAIN FROM DESCRIbING THE SINGLE FEMALE SPECIMENS FROM PERU., Published as part of Weirauch, Christiane, Whorrall, Kyle, Knyshov, Alexander & Hoey-Chamberlain, Rochelle, 2018, Giant among dwarfs: Meganannus lewisi, gen. n. and sp. n., a new genus and species of minute litter bugs from Costa Rica (Hemiptera: Schizopteridae), pp. 156-170 in Zootaxa 4370 (2) on pages 159-163, DOI: 10.11646/zootaxa.4370.2.4, http://zenodo.org/record/1143899, {"references":["Hill, L. (2015) THrEE nEW gEnEra Of ScHizOptEridaE frOm Australia WitH dEscriptiOn Of six nEW spEciEs (HEmiptEra: HEtErOptEra: ScHizOptEridaE). Zootaxa, 3990 (1), 73 - 96."]}

Key to New World Schizopteridae 1 Forewing with four closed submarginal cells (Fig. 1A, black arrows); eyes relatively large, head wider than prothorax (Fig. 1A); labium four-segmented; male sternum VIII well-developed; ovipositor well-developed............................. Hypselosomatinae (Williamsocoris Carpintero and Dellap��, Glyptocombus Heidemann, Ommatides Uhler, Hypselosomops Hoey-Chamberlain and Weirauch, Hypsohapsis Hoey-Chamberlain and Weirauch) - Forewing with less than four closed submarginal cells (Fig. 1B, black arrows); eyes smaller, head not noticeably wider than prothorax (Fig. 1B); labium three- or four-segmented; male sternum VIII reduced, fused with pygophore; ovipositor welldeveloped or obsolete................................................................................. 2 2 Labium four-segmented (Fig. 1C)........................................................................ 3 - Labium three-segmented (Fig. 1D)...................................................................... 6 3 The basal half of the forewing with a deep costal fracture (Fig. 1E, black arrow)............................................................................................ Guapinannus Wygodzinsky and Tropistotrochus Reuter - The basal half of the forewing without a deep costal fracture (Fig. 1B, F, K)...................................... 4 4 Eyes large, about 2/3 as wide as synthlipsis; basal cell of the forewing much smaller than trapezoidal cell, or if larger then only three veins excluding claval veins emanate from trapezoidal cell; veins are often traced by areoles (Fig. 1F); tarsal formula 2- 2-3 in both sexes.............................................................. Peloridinannus Wygodzinsky - Eyes small, about 1/3 or less as wide as synthlipsis; basal cell of the forewing larger or equal to trapezoidal cell; four to five veins excluding claval veins emanate from trapezoidal cell; veins are not traced by areoles; tarsal formula different...... 5 5 Labium straight and long, extending beyond hind coxa (Fig. 1G, black arrow); tarsal formula 3-3- 2 in males, 2-2- 2 in females; body size Chinannus Wygodzinsky - Labium short, not surpassing middle coxa (Fig. 2F); tarsal formula 3-3- 3 in males, 2- 2-3 in females; total size> 2 mm; ovipositor well-developed (Fig. 9B)........................................................... Meganannus, n. gen. 6 Labium truncated (Fig. 1D, white arrow); pronotal collar absent (Fig. 1I, white arrow)..................................... Corixidea genus group (Corixidea Reuter, Hoplonannus McAtee and Malloch, Membracioides McAtee and Malloch, Oncerodes Uhler, Voccoroda Wygodzinsky, Voragocoris Weirauch) - Labium tapering (Fig. 1C, white arrow; 1G, black arrow); pronotal collar usually present (Fig. 1K, grey arrow).......... 7 7 Cu-vein on male forewing thickened and darkened (see Fig. 44 in Wygodzinsky 1948); macropterous, 1AN vein on forewing merges with Cu distally; right side of the male sternum IV with a hook..................... Itagunannus Wygodzinsky - Cu-vein on male forewing not thickened and darkened; in macropterous specimens 1AN disappearing before reaching any other vein or forewing margin (Fig. 1B, white arrow); right side of male sternum IV without a hook................... 8 8 Posterolateral spine on metepisternum well developed (Fig. 1H, white arrow); radial (= posterior costal) cell pentagonal or quadrate (Fig. 1B, grey arrow), considerably smaller than anterior costal cell, distal R-vein straight...................... . the Schizoptera genus group (Ceratocomboides McAtee and Malloch, Ptenidiophyes Reuter, Schizoptera Fieber, Orthorhagus McAtee and Malloch, Kophaegis McAtee and Malloch) - Posterolateral spine on metepisternum absent (Fig. 1K, white arrow); radial (= posterior costal) cell elongate (Fig. 1J, black arrow), slightly smaller than anterior costal cell, distal part of R-vein curved...................................... 9 9 Head moderately to greatly elongated (Fig. 1K), but without frontal projection; labium very slender, curved dorsad at apex, second labial segment much longer than first and third combined (Fig. 1K, black arrow); basal and discoidal cells separate (Fig. 1J, grey arrows).......................................... Nannocoris Reuter and Soekhnandanius Makhan - Head not elongated, but with a frontal projection bearing three stout setae (see Fig. 2 in: Wygodzinsky 1947); labium moderately slender, not curved dorsad at apex, second labial segment roughly as long as either first or third; basal and discoidal cells merged (see Fig. 1 in: Wygodzinsky 1947)........................................... Biturunannus Wygodzinsky, Published as part of Weirauch, Christiane, Whorrall, Kyle, Knyshov, Alexander & Hoey-Chamberlain, Rochelle, 2018, Giant among dwarfs: Meganannus lewisi, gen. n. and sp. n., a new genus and species of minute litter bugs from Costa Rica (Hemiptera: Schizopteridae), pp. 156-170 in Zootaxa 4370 (2) on pages 158-159, DOI: 10.11646/zootaxa.4370.2.4, http://zenodo.org/record/1143899, {"references":["WygOdzinsky, P. (1947) SObrE um nOvO gEnErO E uma nOva EspEciE dE ScHizOptErinaE dO Brasil (CryptOstEmmatidaE, HEmiptEra). Boletin de Entomologia Venezolana, 6, 25 - 35."]}

Meganannus lewisi sp. n. HTTP://ZOObANK.ORG/NOMENCLATURALACTS/3AB609F6-8B03-482E-B309-9 CAD 5FC5A262 FIGURES 2���10 Diagnosis. AS IN GENERIC DIAGNOSIS. Description. AS IN GENERIC DESCRIPTION, FOREWING DARK bROWN WITH CLAVAL SUTURE AND DISTAL PART OF CLAVUS AND DISTAL QUARTER OF bASAL SUbMARGINAL CELL LIGHT YELLOWISH bROWN; TERGITE 8 APPENDAGE OF MALE FORMING ALMOST COMPLETE TUbE WITH DORSAL SLIT-LIKE OPENING PROXIMALLY SEPARATING APPENDAGE INTO POSTERIOR AND ANTERIOR PORTION, ONLY ANTERIOR PORTION FORMING DISTAL PART ENDING IN TWISTED, ROUNDED APEX (FIGS 6B, C, E, F,H, 7E, 8A, D). Measurements. SEE TAbLE 1. Etymology. THIS SPECIES IS NAMED IN HONOR OF JIM LEWIS. JIM HAS HELPED TO ADVANCE bIODIVERSITY RESEARCH ON HETEROPTERA IN COSTA RICA DURING THE PAST FEW DECADES bY DEDICATED SPECIMEN MOUNTING AND SORTING AT INBIO AND HIS TIRELESS EFFORTS IN STIMULATING RESEARCHERS AROUND THE WORLD TO STUDY THIS ACCUMULATED MATERIAL. Specimens examined. Holotype: COSTA RICA: LIMON: POCOCI CO.: R.F. CORDILLERA VOLC��NICA CENTRAL, LAS MINAS, 10.18467��N 83.91361��W, 400 M, 0 9 MAY 2012 ��� 16 MAY 2012, MALAISE TRAP, W. PORRAS, ♂ (UCR_ENT 00014806) (INBIO). Paratypes: COSTA RICA: ALAjUELA: SARAPIQUI CO.: ISLA BONITA, 9.96667��N 84.05000��W, 900 M, 11 JUN 2007 ��� 13 JUN 2007, MALAISE TRAP, A. GARCIA, M. MORAGA, M. ZUMbADO, 1♀ (UCR_ENT 00014800) (INBIO). LIMON: POCOCI CO.: R.F. CORDILLERA VOLC��NICA CENTRAL, LAS MINAS, 10.18467��N 83.91361��W, 400 M, 0 2 MAY 2012 ��� 09 MAY 2012, Malaise trap, W. Porras, 1♀ (UCR_ENT 00109319) (INBIO); 0 9 May 2012 ��� 16 May 2012, Malaise trap, W. PORRAS, 3♂ (UCR_ENT 0 0 0 14804, UCR_ENT 0 0 0 14802, UCR_ENT 00014807), 4♀ (UCR_ENT 0 0 0 14805, UCR_ENT 0 0 0 14808, UCR_ENT 0 0 0 14801, UCR_ENT 00014803) (INBIO)., Published as part of Weirauch, Christiane, Whorrall, Kyle, Knyshov, Alexander & Hoey-Chamberlain, Rochelle, 2018, Giant among dwarfs: Meganannus lewisi, gen. n. and sp. n., a new genus and species of minute litter bugs from Costa Rica (Hemiptera: Schizopteridae), pp. 156-170 in Zootaxa 4370 (2) on pages 163-165, DOI: 10.11646/zootaxa.4370.2.4, http://zenodo.org/record/1143899

Meganannus lewisi sp. n. HTTP://ZOObANK.ORG/NOMENCLATURALACTS/3AB609F6-8B03-482E-B309-9 CAD 5FC5A262 FIGURES 2–10 Diagnosis. AS IN GENERIC DIAGNOSIS. Description. AS IN GENERIC DESCRIPTION, FOREWING DARK bROWN WITH CLAVAL SUTURE AND DISTAL PART OF CLAVUS AND DISTAL QUARTER OF bASAL SUbMARGINAL CELL LIGHT YELLOWISH bROWN; TERGITE 8 APPENDAGE OF MALE FORMING ALMOST COMPLETE TUbE WITH DORSAL SLIT-LIKE OPENING PROXIMALLY SEPARATING APPENDAGE INTO POSTERIOR AND ANTERIOR PORTION, ONLY ANTERIOR PORTION FORMING DISTAL PART ENDING IN TWISTED, ROUNDED APEX (FIGS 6B, C, E, F,H, 7E, 8A, D). Measurements. SEE TAbLE 1. Etymology. THIS SPECIES IS NAMED IN HONOR OF JIM LEWIS. JIM HAS HELPED TO ADVANCE bIODIVERSITY RESEARCH ON HETEROPTERA IN COSTA RICA DURING THE PAST FEW DECADES bY DEDICATED SPECIMEN MOUNTING AND SORTING AT INBIO AND HIS TIRELESS EFFORTS IN STIMULATING RESEARCHERS AROUND THE WORLD TO STUDY THIS ACCUMULATED MATERIAL. Specimens examined. Holotype: COSTA RICA: LIMON: POCOCI CO.: R.F. CORDILLERA VOLCáNICA CENTRAL, LAS MINAS, 10.18467°N 83.91361°W, 400 M, 0 9 MAY 2012 – 16 MAY 2012, MALAISE TRAP, W. PORRAS, ♂ (UCR_ENT 00014806) (INBIO). Paratypes: COSTA RICA: ALAjUELA: SARAPIQUI CO.: ISLA BONITA, 9.96667°N 84.05000°W, 900 M, 11 JUN 2007 – 13 JUN 2007, MALAISE TRAP, A. GARCIA, M. MORAGA, M. ZUMbADO, 1♀ (UCR_ENT 00014800) (INBIO). LIMON: POCOCI CO.: R.F. CORDILLERA VOLCáNICA CENTRAL, LAS MINAS, 10.18467°N 83.91361°W, 400 M, 0 2 MAY 2012 – 09 MAY 2012, Malaise trap, W. Porras, 1♀ (UCR_ENT 00109319) (INBIO); 0 9 May 2012 – 16 May 2012, Malaise trap, W. PORRAS, 3♂ (UCR_ENT 0 0 0 14804, UCR_ENT 0 0 0 14802, UCR_ENT 00014807), 4♀ (UCR_ENT 0 0 0 14805, UCR_ENT 0 0 0 14808, UCR_ENT 0 0 0 14801, UCR_ENT 00014803) (INBIO).

DIPLAZICORIS LOMBOKIANUS SP. NOV. Holotype Indonesia. West Nusa Tenggara: Lombok Island, Senaru, track to Rinjani, 8.31956°S, 116.405°E, 31 August 2012, F. Konstantinov, Diplazium esculentum Swartz (Aspleniaceae), ♂ (AMNH _PBI 00337343) (ZISP). Paratypes Indonesia. West Nusa Tenggara: Lombok Island, Senaru, track to Rinjani, 8.31956°S, 116.405°E, 29 August 2012, F. Konstantinov, Diplazium esculentum Swartz (Aspleniaceae), 3♂ (AMNH _ PBI 00337315 - AMNH _ PBI 00337317), 13♀ (AMNH _ PBI 00337318, AMNH _ PBI 00337319, AMNH _ PBI 00337321 - AMNH _ PBI 00337331), 1 larva (AMNH _ PBI 00337332) (ZISP); 31 August 2012, F. Konstantinov, Diplazium esculentum Swartz (Aspleniaceae), 24♂ (AMNH _ PBI 00337380 - AMNH _ PBI 00337388, AMNH _ PBI 00337333 - AMNH _ PBI 00337342, AMNH _ PBI 00337344, AMNH _ PBI 00337345, AMNH _ PBI 00337371, AMNH _ PBI 00337373, AMNH _ PBI 00337374), 31♀ (AMNH _ PBI 00337389 - AMNH _ PBI 00337396, AMNH _ PBI 00337347 - AMNH _ PBI 00337364, AMNH _ PBI 00337375 - AMNH _ PBI 00337379), 6 larvae (AMNH _ PBI 00337365 - AMNH _ PBI 00337370) (ZISP); 01 Sep 2012, F. Konstantinov, Diplazium esculentum Swartz (Aspleniaceae), 1♂ (AMNH _ PBI 00337291), 9♀ (AMNH _ PBI 00337292 - AMNH _ PBI 00337300) (ZISP). Lombok Island, Senaru, track to waterfalls, 8.30111°S, 116.40833°E, 28 August 2012, F. Konstantinov, Diplazium esculentum Swartz (Aspleniaceae), 4♂ (AMNH _ PBI 00337306 - AMNH _ PBI 00337308, AMNH _ PBI 00337320), 6♀ (AMNH _ PBI 00337309 - AMNH _ PBI 00337314) (ZISP); 31 Aug 2012, F. Konstantinov, Diplazium esculentum Swartz (Aspleniaceae), 1♂ (AMNH _ PBI 00337301), 4♀ (AMNH _ PBI 00337302 - AMNH _ PBI 00337305) (ZISP). Lombok Island, nr Senaru, 8.31956°S 116.405°E, 31 August 2012, F. Konstantinov, Diplazium esculentum Swartz (Aspleniaceae), 1♂ (AMNH _ PBI 00337397), 6♀ (AMNH _ PBI 00337398 - AMNH _ PBI 00337402, AMNH _ PBI 00337404) (ZISP). Diagnosis Same as generic diagnosis. Description Coloration, surface, vestiture, structure, and genitalia: As in generic description. Measurements (see Appendix 3): Male: total body length 2.2–2.8, body 2.4–2.9 times as long as basal width of pronotum. Vertex 2.3–2.8 times as broad as eye. Antennal segment I 0.3–0.4 times as long as head width, segment II 1.4–1.5 times as long as head width and 0.8–1.0 times as long as basal width of pronotum. Pronotum 1.7–1.9 times as wide as long and 1.5–1.7 times as wide as head. Female: total body length 2.7–2.9, body 2.6–2.8 times as long as basal width of pronotum. Vertex 2.6–3.2 times as broad as eye. Antennal segment I 0.3–0.4 times as long as head width, segment II 1.2–1.3 times as long as head width and 0.7–0.8 times as long as basal width of pronotum. Pronotum 1.8–2.0 times as broad as long and 1.7–1.9 times as broad as head. Etymology Named after the type locality, Lombok Island, Indonesia. Host Adults and larvae of D. lombokianus sp. nov. were clearly associated with Diplazium esculentum Swartz (Aspleniaceae), and were never sampled from individuals of other fern species growing nearby., Published as part of Konstantinov, Fedor V. & Knyshov, Alexander A., 2015, The tribe Bryocorini (Insecta: Heteroptera: Miridae: Bryocorinae): phylogeny, description of a new genus, and adaptive radiation on ferns, pp. 441-472 in Zoological Journal of the Linnean Society 175 (3) on page 463, DOI: 10.1111/zoj.12283, http://zenodo.org/record/5339134

Konstantinov, Fedor V., Knyshov, Alexander A. (2015): The tribe Bryocorini (Insecta: Heteroptera: Miridae: Bryocorinae): phylogeny, description of a new genus, and adaptive radiation on ferns. Zoological Journal of the Linnean Society 175 (3): 441-472, DOI: 10.1111/zoj.12283, URL: http://dx.doi.org/10.1111/zoj.12283