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Ardeicola rhaphidius (Nitzsch [in Giebel], 1866: 384) (Fig. 3C) Distribution: Argentina, Brazil, Peru, USA. Distribution in Brazil: SC (Eichler, 1943; Tuff, 1967), SP (present study). Hosts: Plegadis chihi (Vieillot, 1817), P. falcinellus (Linnaeus, 1766) (type host) (Threskiornithidae). Material examined: 1♂ (#7243) ex P. chihi (#9792), Rio Pinheiros (23°32′S, 46°44′W), São Paulo, Brazil, III.1906, J. Florencio col. 1♂ (#7244) ex P. chihi (#2152), Iguape (24°43′S, 47°33′W, msl), São Paulo, Brazil, 20.V.1904, R. Krone col. 1♀ 2N (#7245-47) ex P. chihi (#1934), same locality, 30.IV.1901, same collector., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 9, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Eichler, W. 1943. Notulae Mallophagologicae VI. Uber acht meist neue Federlingsarten aus Sudamerika. MemOrias e Estudos do Museu Zoologico da Universidade de Coimbra, 140: 1 - 7.","Tuff, D. W. 1967. A review of North American Ardeicola (Mallophaga: Philopteridae). Journal of the Kansas Entomological Society, 40 (2): 241 - 263."]}

Bothriometopus macrocnemis (Burmeister, 1838: 433) (Fig. 4A) Distribution: Bolivia, Brazil, Venezuela. Distribution in Brazil: PR (Cicchino & Mey, 2007), RS (Valim et al., 2009), MS, MT, PA, "Amazonia″ (present study). Hosts: Anhima cornuta (Linnaeus, 1766) (type host), Chauna chavaria (Linnaeus, 1766), C. torquata (Oken, 1816) (Anhimidae). Material examined: 1♀ 1N (#7201-02) ex Chauna torquata (#98649), Rio Guaporé (15°31′18″S, 59°5′32.07″W), Vila Bela da Santísima Trindade, Mato Grosso, Brazil, 26.II.2014, L.F. Silveira col. 2N (#7207-08) ex C. torquata (#10104), Corumbá (19°01′S, 57°39′W), Mato Grosso do Sul, Brazil, IX.1917, E. Garbe col. 1♀ 4N (#7203-06) ex Anhima cornuta (#73171), Amazonia, V.1967, no further data. 6N (#7209-11) ex A. cornuta (#24540), Amazonia, 1937, A.M. Olalla col. 1♂ (#7642) ex A. cornuta (#97226), Fazenda Fartura (09°50′S, 50°29′W), Santana do Araguaia, Pará, Brazil, VIII.2013, M.P. Valim and L.F. Silveira cols., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 9, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Burmeister, H. C. C. 1838. Mallophaga Nitzsch. In: Burmeister, H. C. C. Handbuch der Entomologie. Berlin, Enslin. p. 418 - 443.","Cicchino, A. C. & Mey, E. 2007. On morphology, taxonomy, ecology, and distribution of Bothriometopus Taschenberg (Phthiraptera, Ischnocera, Philopteridae sensu lato). Rudolstadter Naturhistorische Schriften, 14: 43 - 60.","Valim, M. P.; Lambrecht, F. M. & Vianna, E. E. S. 2009. New records of chewing lice (Insecta, Phthiraptera) from birds of southern Brazil, with description of a new species. Iheringia. Serie Zoologia, 99 (3): 249 - 258. https: // doi. org / 10.1590 / S 0073 - 47212009000300004."]}

Ibidoecus phimosus Carriker, 1947: 124 (Fig. 4D) Distribution: Argentina, Brazil, Colombia. Distribution in Brazil: BA (present study), RS (Valim et al., 2009). Hosts: Phimosus infuscatus (Lichtenstein, 1823), P. i. berlepschi Hellmayr, 1903 (type host) (Threskiornithidae). Material examined: 1♀ 1N (#7216-17) ex Phimosus infuscatus nudifrons (#40753), Rio Preto (11°21′S, 43°52′W), Santa Rita de Cássia, Bahia, Brazil, 28.III.1958,E.Dente col., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 10, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Carriker Jr., M. A. 1947. Neotropical Mallophaga miscellany. No. 2. The genus Ibidoecus Cummings. Boletin de Entomologia Venezolana, 6 (2 - 4): 111 - 136.","Valim, M. P.; Lambrecht, F. M. & Vianna, E. E. S. 2009. New records of chewing lice (Insecta, Phthiraptera) from birds of southern Brazil, with description of a new species. Iheringia. Serie Zoologia, 99 (3): 249 - 258. https: // doi. org / 10.1590 / S 0073 - 47212009000300004."]}

Ibidoecus iberoamericanus Eichler, 1943: 5 (Fig. 4C) Distribution: Argentina, Brazil, Colombia. Distribution in Brazil: PA (Eichler, 1943), MG, SP (present study). Host: Platalea ajaja Linnaeus, 1758 (type host) (Threskiornithidae). Material examined: 1♀ 2N (#7212-14) ex Platalea ajaja (#2406), Iguape (24°43′S, 47°33′W, msl), São Paulo, Brazil, 10.VII.1893, R. Krone col. 1N (#72115) ex P.ajaja (#14955), Tabatinguara (25°01′S, 47°57′W), Cananéia, São Paulo, Brazil, 20.IX.1934, C. Camargo col. 1♂ 1♀ 1N (#66-67) ex P. ajaja, Tabatinguara (25°01′S, 47°57′W), Cananéia, São Paulo, Brazil, no date, C. Worontzow col. 1♀ (#1501) ex P.ajaja, Pirapora, Minas Gerais, Brazil, 1913, E. Garbe col., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 9, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Eichler, W. 1943. Notulae Mallophagologicae VI. Uber acht meist neue Federlingsarten aus Sudamerika. MemOrias e Estudos do Museu Zoologico da Universidade de Coimbra, 140: 1 - 7."]}

Plegadiphilus plegadis (Dubinin, 1938: 178) (Fig. 2E) Distribution: Argentina, Brazil (present study), Russia, USA. Distribution in Brazil: SP (present study). Hosts: Plegadis chihi (Vieillot, 1817), P. falcinellus (Linnaeus, 1766) (type host) (Threskiornithidae). Material examined: 2♂ 1N (#7168-70) ex P.chihi (#9792), Rio Pinheiros (23°32′S, 46°44′W), São Paulo, Brazil, III.1906, J. Florencio col. 1♂ 1N (#7166-67) ex P. chihi (#9792), Iguape (24°43′S, 47°33′W, msl), São Paulo, Brazil, 20.V.1904, R. Krone col., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 7, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Dubinin, W. B. 1938. Ismenenija parasitofauny karavajki (Plegadis falcinellus) vysyvajemyje vosrostom i migracjej chosiaina. Trudy Astrachanskogo Gosudarstvennogo Zapovednika, 2: 114 - 212. [in Russian]"]}

Plegadiphilus mamillatus (Piaget, 1885: 114) (Fig. 2D) Distribution: Bolivia, Brazil (present study), Colombia. Distribution in Brazil: MS (present study). Host: Theristicus caudatus (Boddaert, 1783) (type host) (Threskiornithidae). Material examined: 1♀ (#7165) ex Theristicus caudatus (#18247), Salobra (20°10′S, 56°31′W, 125 amsl), Miranda, Mato Grosso do Sul, Brazil, 21.VII.1939, Exp. [MZUSP] Mato Grosso col., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 7, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Piaget, E. 1885. Les Pediculines. Essai monographique. Leiden, E. J. Brill."]}

Colpocephalum trispinum Piaget, 1885: 122 (Fig. 1F) Distribution: Brazil (present study), Chile, Ecuador. Distribution in Brazil: SC, MS (present study). Hosts: Theristicus caudatus (Boddaert, 1783) (type host), T. melanopis (Gmelin, 1789) (Threskiornithidae). Material examined: 4♂ 1♀ (#7151-52) ex Theristicus caudatus (#18247), Salobra (20°10′S, 56°31′W, 125 amsl), Miranda, Mato Grosso do Sul, Brazil, 21.VII.1939, Exp. [MZUSP] Mato Grosso col. 2♂ (#7153-54) same data, except ex T. caudatus (#18246). 2♂ 6♀ (#2892-95) ex T. caudatus, Escola de Veterinária, Blumenau, Santa Catarina, Brazil, 2001, J.C. Souza Jr col., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 5, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Piaget, E. 1885. Les Pediculines. Essai monographique. Leiden, E. J. Brill."]}

Ardeicola theristicus (Pessôa & Guimarães, 1935a: 311) (Fig. 3D) Distribution: Brazil. Distribution in Brazil: MS (Pessôa & Guimarães, 1935a; present study). Host: Theristicus caudatus (Boddaert, 1783) (type host) (Threskiornithidae). Material examined: 5♂ 5♀ 9N (#7218-27) ex Theristicus caudatus (#18247), Salobra (20°10′S, 56°31′W, 125 amsl), Miranda, Mato Grosso do Sul, Brazil, 21.VII.1939, Exp. [MZUSP] Mato Grosso col. 4♂ 2♀ 7N (#7228-33) same data, except ex T.caudatus (#18246)., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 9, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Pessoa, S. B. & Guimaraes, L. R. 1935 a. Contribuicao para o conhecimento das Mallophagas das aves do Brasil: I - Novas especies do genero Esthiopterum. Annaes da Faculdade de Medicina de Sao Paulo, 11 (3): 311 - 314."]}

Dicteisia abdominalis Carriker & Díaz-Ungría, 1961: 38 (Fig. 2A) Distribution: Brazil, Colombia, Ecuador, Paraguay, Venezuela. Distribution in Brazil: no further data (Price, 1968), "Amazonia″ (present study)., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 5, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Carriker, M. A. Jr. & Diaz-Ungria, C. 1961. New and little known Mallophaga from Venezuelan birds (Part I). Novedades Cientificas. Serie zoolOgica: contribuiciones ocasionales del Museo de Historia Natural La Salle, 28: 1 - 60.","Price, R. D. 1968. A review of the genus Dicteisia Bedford (Mallophaga: Menoponidae) with descriptions of a new species. Journal of Medical Entomology, 5 (4): 445 - 452. https: // doi. org / 10.1093 / jmedent / 5.4.445."]}

Dicteisia palamedea Eichler, 1954: 43 (Fig. 2C) Distribution: Brazil, Colombia, Ecuador, Paraguay, Peru. Distribution in Brazil: no further data (Price, 1968), "Amazonia″ (present study)., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 7, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Eichler, W. 1954. Peruanische Mallophagen. In: Titischack, E. Beitrage zur Fauna Perus, nach der ausbeute der hamburg sudperu-expedition. Jena, G. Fisher. v. 4, p. 28 - 62.","Price, R. D. 1968. A review of the genus Dicteisia Bedford (Mallophaga: Menoponidae) with descriptions of a new species. Journal of Medical Entomology, 5 (4): 445 - 452. https: // doi. org / 10.1093 / jmedent / 5.4.445."]}

Colpocephalum ajajae Ewing, 1930: 126 (Fig. 1A) Distribution: Argentina, Brazil (present study), Guyana, Panama, USA. Distribution in Brazil: RS, SP (present study). Host: Platalea ajaja Linnaeus, 1758 (type host) (Threskiornithidae). Material examined: 1♂ (#7148) ex Platalea ajaja (#14955),Tabatinguara (25°01′S, 47°57′W), Cananéia, São Paulo, Brazil, 20.IX.1934, C. Camargo col. 1♀ 1N (#7149-50) ex P. ajaja (#9106), Rio Grande do Sul, Brazil, no further data., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 2, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Ewing, H. E. 1930. Two new generic names and three new species of Mallophaga. Proceedings of the Biological Society of Washington, 43: 125 - 128."]}

Rallicola funebris (Nitzsch [in Giebel], 1866: 371) (Fig. 4E) Distribution: Argentina, Brazil, Bolivia, Colombia, USA. Distribution in Brazil: MS (Pessôa & Guimarães, 1935b), SP (present study)., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on page 10, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Pessoa, S. B. & Guimaraes, L. R. 1935 b. Contribuicao para o conhecimento das Mallophagas das aves do Brasil: II - Nova especie do genero Rallicola. Annaes da Faculdade de Medicina de Sao Paulo, 11 (2): 169 - 171."]}

Dicteisia keleri Price, 1968: 448 (Fig. 2B) Distribution: Argentina, Brazil, Paraguay. Distribution in Brazil: MT (Price, 1968; present study), MS (Price, 1968). Hosts: Anhima cornuta (Linnaeus, 1766), Chauna torquata (Oken, 1816) (type host) (Anhimidae). Material examined: 1♂ (#7173) ex Chauna torquata (#98649), Rio Guaporé (15°03′01.18″S, 59°05′32.07″W), Vila Bela da Santísima Trindade, Mato Grosso, Brazil, 26.II.2014, L.F. Silveira col., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on pages 5-7, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Price, R. D. 1968. A review of the genus Dicteisia Bedford (Mallophaga: Menoponidae) with descriptions of a new species. Journal of Medical Entomology, 5 (4): 445 - 452. https: // doi. org / 10.1093 / jmedent / 5.4.445."]}

Ardeicola praegracilis Carriker, 1960: 321 (Fig. 3B) Distribution: Argentina, Brazil, Colombia. Distribution in Brazil: RS (Valim et al., 2009), BA, PA (present study). Hosts: Phimosus infuscatus (Lichtenstein, 1823), P. i. berlepschi Hellmayr, 1903 (type host) (Threskiornithidae). Material examined: 1♂ 1♀ 2N (#7248-51) ex Phimosus infuscatus nudifrons (#83734), Fazenda Fartura (09°42′S, 50°24′W), Santana do Araguaia, Pará, Brazil, 03.IX.2009, L.F.Silveira col. 1♂ 1♀ (#7252-53) ex P.i.nudifrons (#40753), Rio Preto (11°21′S, 43°52′W), Santa Rita de Cássia, Bahia, Brazil, 28.III.1958, E. Dente col., Published as part of Kuabara, Kamila M. D., Valim, Michel P. & Silveira, Luís Fábio, 2023, New records of chewing lice (Insecta: Phthiraptera) parasites of Brazilian Anhimidae, Threskiornithidae, and Aramidae (Aves), pp. 1-13 in Papéis Avulsos de Zoologia 63 on pages 7-9, DOI: 10.11606/1807-0205/2023.63.020, http://zenodo.org/record/8135255, {"references":["Carriker Jr., M. A. 1960. New species of Ardeicola (Mallophaga) from Colombian hosts. Novedades Colombianas, 1 (5): 317 - 329.","Valim, M. P.; Lambrecht, F. M. & Vianna, E. E. S. 2009. New records of chewing lice (Insecta, Phthiraptera) from birds of southern Brazil, with description of a new species. Iheringia. Serie Zoologia, 99 (3): 249 - 258. https: // doi. org / 10.1590 / S 0073 - 47212009000300004."]}

Myrsidea pyriglenae, new species (Figs 14–17, 27, 43–44) Type host. Pyriglena leucoptera (Vieillot, 1818) —white-shouldered fire-eye. Type locality. San Rafael National Park, Paraguay (26°30'S, 55°47'W). Type material. Ex Pyriglena leucoptera: holotype ♀, San Rafael National Park, Paraguay (26°30'S, 55°47'W), 21 August 2012, I. Literak (MMBC). Paratypes: 6♀, 7♂ with the same data as holotype (MMBC). Diagnosis. Myrsidea pyriglenae belongs to the mcleannani species group (sensu Price et al. 2008b), based on the shape of the male genital sac sclerite and the deeply serrated female vulvar margin. According to setal counts and measurements, it is morphologically similar to M. milleri Price, Johnson & Dalgleish, 2008 ex Gymnopithys rufigula (Boddaert, 1783) from Venezuela. However, females of M. pyriglenae n. sp. are distinguished from those of M. milleri by having (1) modified tergites, especially enlarged tergite II (Fig. 27), and (2) larger number of setae on tergite VII (14–16 vs 6–10), tergite VIII (8–9 vs 4), and on anal fringe (83–88 vs 64–74). Males of M. pyriglenae differ from those of M. milleri by having a larger number of setae on tergites VII (11–15 vs 7–9) and VIII (7–8 vs 4). In addition, the host species of these two species of Myrsidea (Pyriglena leucoptera and Gymnopithys rufigula) have different geographical distributions (Clements et al. 2017) and are not phylogenetically closely related (Isler et al. 2013). Considering genetic data, M. pyriglenae is closest to M. patersoni Price & Johnson, 2009 (see Remarks below), but these two species clearly differ in such significant characters as (1) female tergites having completely different shapes (compare Fig. 27 with fig. 3 in Price & Johnson 2009), and (2) completely different genital sac sclerite in males (compare Figs 14–17 with fig. 4 in Price & Johnson 2009). Description. Female (n = 4). As in Figs 27 and 43. Head with lateral sides of preantennal region conspicuously concave. Hypopharyngeal sclerites fully developed. Length of dhs 10, 0.050–0.064; dhs 11, 0.100– 0.113; ratio dhs 10/11, 0.44–0.63; ls5 0.04–0.05 long, latero-ventral fringe with 9–10 setae. Gula with 4–5 setae on each side. Pronotum with 6 setae on posterior margin and 3 short spiniform setae at each lateral corner. First tibia with 3 outer ventro-lateral and 4 dorso-lateral setae. Metanotum not enlarged, with 4–7 marginal setae; metasternal plate with 6–7 setae; metapleurites with 3–4 short strong spiniform setae. Femur III with 14–16 setae in ventral setal brush. Tergites modified as on Fig. 27, with enlarged tergite II and widely convex posterior margin of tergites II and III. Abdominal segments with well-defined median gap in each row of tergal setae. Tergal setae: I, 5–8; II, 6– 8; III, 11–12; IV–V, 15–18; VI, 15–17; VII, 14–16; VIII, 8–9. Postspiracular setae very long on II, IV, VII and VIII (0.35–0.45); long on I (0.23); and short on III, V and VI (0.11–0.16). Inner posterior seta of last tergum not longer than anal fringe setae with length 0.07–0.09 inserted 0.060–0.075 from base of each very long seta; length of short lateral marginal seta of last segment, 0.03–0.04. Pleural setae: I, 6–8; II, 7–10; III, 7–9; IV, 8; V, 6–7; VI, 6; VII, 4– 5; VIII, 3. Pleurites V–VII with 1–2 somewhat slender and longer setae. Pleurite VIII with inner setae (0.06–0.08) as long as outer (0.05–0.06). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 4–6 in each aster: s1, 0.08–0.10; s2, 0.08–0.09; s3, 0.07–0.08; s4, 0.05–0.06; s5, 0.04; with 14–16 marginal setae between asters, 4–7 medioanterior; III, 27–30; IV, 3 3–36; V, 32–39; VI, 28–36; VII, 23–25; VIII–IX, 15–18; and 9–13 setae on deeply serrated vulvar margin; sternites without medioanterior setae. Anal fringe formed by 38–43 dorsal and 42–46 ventral setae. Dimensions: TW, 0.46–0.48; POW, 0.35; HL, 0.28–0.34; PW, 0.29–0.30; MW, 0.44–0.48; AWIV, 0.61–0.66; ANW, 0.21–0.26; TL, 1.55–1.63. Male (n = 4). As in Fig. 44. Similar to female except as follows: length of dhs 10, 0.040–0.058; dhs 11, 0.089– 0.100; ratio dhs 10/11, 0.45–0.64; ls5 0.04 long, latero-ventral fringe with 9–10 setae. Gula with 5 (one specimen with 4 on one side) setae on each side. First tibia with 3 outer ventro-lateral and 4–5 dorso-lateral setae. Metanotum not enlarged with 4 marginal setae; metasternal plate with 5–6 setae; metapleurites with 3 short spiniform strong setae. Femur III with 11–13 setae in ventral setal brush. Abdominal segments with well-defined median gap in each row of tergal setae. Tergal setae: I, 6–8; II, 6–11; III, 14–15; IV, 13–16; V, 15–17; VI, 14–18; VII, 11–15; VIII, 7–8. Postspiracular setae same with the same pattern as in female but shorter. Length of inner posterior seta of last tergum, 0.04–0.06; short lateral marginal seta of last segment, 0.02. Pleural setae: I, 5–6; II, 6–7; III, 7–8; IV, 6–7; V, 5–7; VI, 5–6; VII, 4; VIII, 3. Pleurites IV–VII with 0–3 slender and longer setae. Pleurite VIII with inner setae (0.04–0.05) as long as outer (0.04–0.05). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 4–5 in each aster: s1, 0.08–0.09; s2, 0.07–0.08; s3, 0.06; s4, 0.05–0.06; s5, 0.03; with 12–15 marginal setae between asters, 4–7 medioanterior; III, 1 9–27; IV, 25–29; V, 26–32; VI, 25–27; VII, 19–22; VIII, 7–11; remainder of plate, 8–11; and with 3–4 setae posteriorly; with 8–9 internal anal setae. Genital sac sclerite as in Figs 14–17. Dimensions: TW, 0.41–0.43; POW, 0.31–0.32; HL, 0.27–0.30; PW, 0.26–0.28; MW, 0.35–0.38; AWIV, 0.46–0.47; GW, 0.10–0.11; GSL, 0.08–0.09; TL, 1.25–1.33. Etymology. The species epithet is a noun in apposition derived from the generic name of the type host. Remarks. This is the first record of Myrsidea from Pyriglena leucoptera. A portion of COI gene was sequenced from specimens of M. pyriglenae from Paraguay (GenBank MF563533). Comparing our sequence with other known sequences of Neotropical Myrsidea, the divergences exceeded 18% in all cases, the closest being that of M. patersoni Price & Johnson, 2009 (ex Eucometis penicillata (Spix, 1825), family Thraupidae, GenBank GQ454448), with a p-distance of 18.2%. Unfortunately, there are no genetic sequences known from M. milleri, the species morphologically closest to M. pyriglenae. However, considering the combination of morphological differences with M. patersoni and M. milleri, and the large sequence divergence with M. patersoni, we are confident that M. pyriglenae is a new, separate species., Published as part of Kolencik, Stanislav, Sychra, Oldrich, Papousek, Ivo, Kuabara, Kamila M. D., Valim, Michel P. & Literak, Ivan, 2018, New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves), pp. 401-431 in Zootaxa 4418 (5) on pages 418-420, DOI: 10.11646/zootaxa.4418.5.1, http://zenodo.org/record/1244956, {"references":["Price, R. D., Johnson, K. P. & Dalgleish, R. C. (2008 b) Five new species of Myrsidea Waterston (Phthiraptera: Menoponidae) from antshrikes and antbirds (Passeriformes: Thamnophilidae). Zootaxa, 1819, 55 - 62.","Clements, J. F., Schulenberg, T. S., Iliff, M. J., Roberson, D., Fredericks, T. A., Sullivan, B. L. & Wood, C. L. (2017) The eBird / Clements checklist of birds of the world: v 2017. Available from: http: // www. birds. cornell. edu / clementschecklist / download / (accessed 14 June 2017)","Isler, M. L., Bravo, G. A. & Brumfield, R. T. (2013) Taxonomic revision of Myrmeciza (Aves: Passeriformes: Thamnophilidae) into 12 genera based on phylogenetic, morphological, behavioral, and ecological data. Zootaxa, 3717 (4), 469 - 497. https: // doi. org / 10.11646 / zootaxa. 3717.4.3","Price, R. D. & Johnson K. P. (2009) Five new species of Myrsidea Waterston (Phthiraptera: Menoponidae) from tanagers (Passeriformes: Thraupidae) in Panama. Zootaxa, 2200, 61 - 68."]}

Myrsidea scleruri, new species (Figs 4, 11, 22–23) Myrsidea sp. 1; Kuabara & Valim, 2017: 150. Type host. Sclerurus scansor (Menetries, 1835) —rufous-breasted leaftosser. Type locality. Ilha Grande, Rio de Janeiro, Brazil (23°09'S, 44°14'W). Type material. Ex Sclerurus scansor: holotype ♀ (MZUSP#6745), Ilha Grande, Rio de Janeiro, Brazil, 21 September 1944, H. Sick. Paratypes: 2♂, 1♀, (MZUSP#6743–44, 6746) with the same data as holotype (MZUSP). Other material, non-type. 1♂ San Rafael National Park, Paraguay (26°30'S, 55°47'W), 19 August 2012, I. Literak (MMBC). Diagnosis. Myrsidea scleruri n. sp. has the same type of male genital sac sclerite as other species of Myrsidea from the Furnariidae. However, it can be easily distinguished from all Neotropical Myrsidea by a unique combination of characters: (1) pronotum with 8 setae on posterior margin, (2) pleurites III–VII with 2–4 slender and quite long setae, (3) the shape of the male genital sac sclerite (Fig. 11), and (4) shape of female tergites (Fig. 4). Myrsidea calvi Sychra et al., 2007 —described from Sclerurus guatemalensis (Hartlaub, 1844) in Costa Ricais morphologically close to M. scleruri but both species can be easily separated by: (1) number of setae on the posterior margin of pronotum (6 setae vs 8 setae in M. scleruri), (2) shape of tergites I and II, and (3) female total length (1.52–1.60 vs 1.86–1.92). There are five species of Neotropical Myrsidea with 8 setae on the posterior margin of pronotum, as follows: M. aitkeni Clay, 1966, M. antiqua Ansari, 1956, M. carrikeri (Eichler, 1943), M. elegans Ansari, 1956 and M. obsoleti Kounek & Sychra [in Kounek et al.], 2013. All these species were described from members of the Turdidae and are placed in the carrikeri species group (sensu Clay 1966). Myrsidea scleruri is easily distinguished from all these species by a completely different male genital sac sclerite and different modification of tergites in the female. Description. Female (n = 2). As in Figs 4 and 22. Hypopharyngeal sclerites fully developed. Length of dhs 10, 0.090; dhs 11, 0.116; ratio dhs 10/11, 0.78; ls5 broken, latero-ventral fringe with 10 setae. Gula with 4 setae on each side. Pronotum with 8 setae on posterior margin and 3 medium length spiniform setae at each lateral corner. First tibia with 3 outer ventro-lateral and 4 dorso-lateral setae. Metanotum enlarged, with 4 marginal setae; metasternal plate with 7–9 setae; metapleurites with 3–4 short strong spiniform setae. Femur III with 18–22 setae in ventral setal brush. Tergite I narrow with medium posterior enlargement; tergite II three times larger than I, with anterior margin medially concave due to enlargement of tergite I. Tergites III-IV slightly concave posteriorly as result of enlargement of first tergites. Abdominal segments II–VIII with well-defined median gap in each row of tergal setae (Fig. 4). Tergal setae: I, 17–20; II, 22–24; III, 22–23; IV, 2 2–26; V, 26; VI, 18–20; VII, 12; VIII, 2–4. Postspiracular setae very long on II, IV, VII and VIII (0.41–0.52); and shorter on I, III, V and VI (0.19–0.30). Inner posterior seta of last tergum with length 0.01; length of short lateral marginal seta of last segment, 0.03–0.04. Pleural setae: I, 8–9; II, 8–12; III, 8–10; IV, 6–11; V, 6–8; VI, 6–7; VII, 5–6; VIII, 3–4. Pleurites III–VII with 2–4 slender and longer setae. Pleurite VIII with length of inner setae 0.04–0.06 and outer 0.06–0.07. Anterior margin of sternal plate II with a small medial notch. Sternal setae: I, 0 (female paratype with 1 seta); II, 5 in each aster: s1, 0.11–0.13; s2, 0.08–0.11; s3, 0.05–0.07; s4, 0.03–0.04; s5, 0.02–0.03; with 14–16 marginal setae between asters, 4–5 medioanterior setae; III, 40–46; IV, 44–48; V, 47–54; VI, 45–46; VII, 20–25; VIII–IX, 16–17; and 15–17 setae on scantly serrated vulvar margin, without medioanterior setae on sternites III–VII. Anal fringe formed by 42–45 dorsal and 41–42 ventral setae. Dimensions: TW, 0.50; POW, 0.35; HL, 0.35–0.41; PW, 0.35; MW, 0.55–0.60; AWIV, 0.76–0.88; ANW, 0.27–0.28; TL, 1.86–1.92. Male (n = 3). As in Fig. 23. Similar to female except as follows: length of dhs 10, 0.070–0.098; dhs 11, 0.110– 0.112; ratio dhs 10/11, 0.64–0.89. Latero-ventral fringe with 10 setae (one specimen with 11 on one side). Gula with 4–5 setae on each side. Pronotum with 8 setae on posterior margin and 3 short spiniform setae at each lateral corner. First tibia with 3 outer ventro-lateral and 4–5 dorso-lateral setae. Metanotum with posterior margin roughly straight with 4 marginal setae; metasternal plate with 7–10 setae; metapleurites with 3–5 short spiniform strong setae. Femur III with 15–21 setae in ventral setal brush. Abdominal tergites with continuous row of setae on tergites I–V and with short median gap in the row of setae only on tergites VI–VIII. Tergal setae: I, 12–14; II, 18– 21; III, 16–25; IV, 16–23; V, 18–21; VI, 15–22; VII, 12–19; VIII, 7–8. Postspiracular setae same with the same pattern as in female but shorter. Length of inner posterior seta of last tergum, 0.01–0.02; short lateral marginal seta of last segment, 0.01–0.02. Pleural setae: I, 5–7; II, 7–12; III, 7–13; IV, 6–12; V, 6–11; VI, 6–10; VII, 5–9; VIII, 3– 5. Pleurites III–VII with 2–4 slender and longer setae: Pleurite VIII with inner setae (0.02) smaller as the outer one (0.03–0.05). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 4–5 in each aster: s1, 0.08–0.10; s2, 0.07–0.10; s3, 0.05–0.07; s4, 0.03–0.04; s5, 0.02–0.03; with 15–17 marginal setae between asters, 7–14 medioanterior; III, 34–37; IV, 45–49; V, 48–52; VI, 47–51; VII, 28–31; VIII, 9–11; remainder of plate, 14–17; sternites VI–VIII with 0–2 medioanterior setae. Genital sac sclerite as in Fig. 11. Dimensions: TW, 0.43–0.49; POW, 0.31–0.33; HL and PW, 0.31–0.33; MW, 0.41–0.46; AWIV, 0.55–0.58; GW, 0.12–0.14; GSL, 0.10; TL, 1.45–1.54. Etymology. The species epithet is a noun in apposition derived from the generic name of the type host.

Myrsidea zuzanae, new species (Figs 5, 12–13, 24–25) Type host. Furnarius rufus (J.F. Gmelin, 1788) —rufous hornero. Type locality. Los Tres Gigantes Biological Station in the Paraguayan Pantanal, Paraguay (20°04'S, 50°09'W). Type material. Ex Furnarius rufus: holotype ♀, Los Tres Gigantes Biological Station in the Paraguayan Pantanal, Paraguay (20°04'S, 50°09'W), 6–7 August 2012, I. Literak (MMBC). Paratypes: 1♀, 2♂ with the same data as holotype (MMBC). Diagnosis. Myrsidea zuzanae n. sp. shares the same type of male genital sac sclerite as other Myrsidea from the Furnariidae, but it can be easily distinguished from them by its unique modification of female tergites, especially II being the only tergite with a prominent medioposterior convexity (Fig. 5). However, among species of Neotropical Myrsidea from other bird families, M. zuzanae has a similar modification of female tergites as that of M. rufi Price & Dalgleish, 2006 and M. phoenicii Price & Dalgleish, 2006 from the Thraupidae. However, males of these two species have a completely different type of genital sac sclerite. In addition, females of M. zuzanae differ from those of M. rufi by (1) fewer setae on tergite VIII (4–5 in M. zuzanae vs 6–8 in M. rufi), and (2) more setae on sternites III–V (total 11 7–124 in M. zuzanae vs 85–97 in M. rufi). Also, it differs from females of M. phoenicii by (1) more setae on tergite I (14–19 in M. zuzanae vs 10–12 in M. phoenicii), (2) more setae on sternites III–V (total 117–124 in M. zuzanae vs 72–95 in M. phoenicii), and (3) fewer setae on tergite VIII (4–5 in M. zuzanae vs 6–8 in M. phoenicii). Description. Female (n = 2). As in Figs 5 and 24. Hypopharyngeal sclerites fully developed. Length of dhs 10, 0.060–0.065; dhs 11, 0.102–0.105; ratio dhs 10/11, 0.36–0.57; ls5 0.06 long, latero-ventral fringe with 10–11 setae. Gula with 4 setae on each side. Pronotum with 6 setae on posterior margin and 3 short spiniform setae at each lateral corner. First tibia with 3 outer ventro-lateral and 4 dorso-lateral setae. Metanotum not enlarged, with 11–12 marginal setae; metasternal plate with 6 setae; metapleurites with 3–4 short strong spiniform setae. Femur III with 19–21 setae in ventral setal brush. Tergites modified as follows: tergite II with prominent medioposterior convexity and tergite III with widely rounded posterior margin (Fig. 5). Abdominal segments with well-defined median gap in row of tergal setae II–VIII. Tergal setae: I, 14–19; II, 12–13; III, 10; IV, 10; V, 12–13; VI, 12; VII, 12; VIII, 4–5. Postspiracular setae very long on I, II, IV, VII and VIII (0.31–0.46); and short on III, V–VI (0.16–0.27). Inner posterior seta of last tergum not longer than anal fringe setae with length 0.03; length of short lateral marginal seta of last segment, 0.04. Pleural setae: I, 6–7; II, 7–9; III, 8–9; IV, 6–9; V, 6–7; VI, 5–6; VII, 4–5; VIII, 3. Pleurites with only short spine-like setae. Pleurite VIII with inner setae (0.04) as long as outer (0.04–0.05). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 4 in each aster: s1, 0.09–0.10; s2, 0.05–0.06; s3, 0.05; s4, 0.03; with 13–14 marginal setae between asters, 2–5 medioanterior; III, 30–33; IV, 43–47; V, 44; VI, 27–29; VII, 15; VIII–IX, 9; and 11–13 setae on deeply serrated vulvar margin; without medioanterior setae on sternites. Anal fringe formed by 40 dorsal and 36 ventral setae. Dimensions: TW, 0.45–0.46; POW, 0.35–0.36; HL, 0.30– 0.32; PW, 0.29; MW, 0.45–0.46; AWIV, 0.63–0.65; ANW, 0.23; TL, 1.52–1.58. Male (n = 2). As in Fig. 25. As for female, except as follows: length of dhs 10, 0.060; dhs 11, 0.95–0.98; ratio dhs 10/11, 0.61–0.63; ls5 0.04–0.06 long, latero-ventral fringe with 10–11 setae. Gula with 2–4 setae on each side. Metanotum not enlarged with 8–9 marginal setae; metasternal plate with 6 setae; metapleurites with 3–4 short spiniform strong setae. Femur III with 14–17 setae in ventral setal brush. Abdominal segments with well-defined median gap in each row of tergal setae. Tergal setae: I, 6–7; II, 8–11; III, 7–8; IV–V, 8; VI–VII, 7–8; VIII, 4. Postspiracular setae very long on II, IV, VII and VIII (0.42–0.45); long on I (0.29); and short on III, V and VI (0.13–0.23). Length of inner posterior seta of last tergum, 0.045–0.070; short lateral marginal seta of last segment, 0.020–0.025. Pleural setae: I, 4–5; II, 6–7; III, 5–6; IV, 5–6; V, 5–6; VI, 4; VII, 2–4; VIII, 3. Pleurite VIII with inner setae (0.03–0.04) as long as outer (0.03–0.04). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 4 in each aster: s1, 0.07–0.11; s2, 0.05–0.06; s3, 0.04–0.05; s4, 0.03–0.04; with 12–14 marginal setae between asters, 4 medioanterior; III, 20–21; IV, 28–33; V, 33; VI, 26; VII, 15; VIII, 5–7; remainder of plate, 7–8; and with 3 setae posteriorly; without medioanterior setae on sternites. With 8 internal anal setae. Genital sac sclerite as in Figs 12–13. Dimensions: TW, 0.42; POW, 0.32–0.33; HL, 0.28–0.29; PW, 0.26–0.27; MW, 0.37–0.38; AWIV, 0.48–0.53; GW, 0.10–0.11; GSL, 0.08; TL, 1.28–1.36. Etymology. This species is named in honour of Zuzana Kokeš, the sister of the first author, in recognition of her great support during his life. Remarks. This is the first record of Myrsidea from Furnarius rufus. A portion of COI gene was sequenced from specimens of M. zuzanae from Paraguay (GenBank MF563531). Comparing our sequence with other known sequences of Neotropical Myrsidea, the divergences exceeded 19% in all cases. However, comparing our sequence of M. zuzanae with all known Myrsidea, the closest was that of M. marksi Johnson & Price, 2006 (ex Phyllastrephus albigularis (Sharpe, 1882), family Pycnonotidae, from the Democratic Republic of the Congo, GenBank KU187279 – KU187280), with a p-distance of 17.9%. These sequence divergences are large enough to confirm M. zuzanae as a new, separate species.

Myrsidea flaviventris Price, Hellenthal & Dalgleish, 2005 Myrsidea flaviventris Price, Hellenthal & Dalgleish, 2005: 8. Type host. Tolmomyias flaviventris (Wied, 1831) —yellow-breasted flycatcher. Type locality. Melajo Forest, Sangre Grande, Trinidad & Tobago. Material examined. Ex Tolmomyias sulphurescens (Spix, 1825) —yellow-olive flycatcher: 1♀, Atlántida, Tela, Lancetilla Botanical Garden, Honduras (15°44'N, 87°27'W), 10 August 2014, I. Literak (MMBC). Remarks. This is the first record of Myrsidea from Tolmomyias sulphurescens. Until now, Myrsidea flaviventris was known from Trinidad & Tobago and Perú (Price et al. 2005), and this is the first record from Honduras. Our specimen differs from the original description of M. flaviventris by setal counts and dimensions, as follows [data from Price et al. (2005) are in parentheses]: Female (n = 1). Tergal setae: II, 15 (9–11); V, 12 (10–11). Sternal setae: II, in total 17 (24–25) medioanterior and marginal setae; III, 27 (23–25); IV, 36 (31–35); VI, 34 (35–37). Anal fringe with 32 (35–42) dorsal setae. Dimensions: TW, 0.47 (0.46); MW, 0.44 (0.41–0.42); ANW, 0.22 (0.20–0.21).

Myrsidea capeki, new species (Figs 26, 30–34, 41–42) Type host. Chiroxiphia caudata (Shaw, 1793) —swallow-tailed manakin. Type locality. San Rafael National Park, Paraguay (26°30'S, 55°47'W). Type material. Ex Chiroxiphia caudata: holotype ♀, San Rafael National Park, Paraguay (26°30'S, 55°47'W), 18–23 August 2012, I. Literak (MMBC). Paratypes: 6♀, 7♂ with the same data as holotype (MMBC). Diagnosis. Myrsidea capeki n. sp. can be easily distinguished from other Myrsidea from the Pipridae and from other Neotropical species by the shape of female tergites (Fig. 26): (1) tergite I slightly enlarged with widely rounded posterior margin, (2) tergites II–III with convex posterior margin, (3) tergite I with continuous row of long setae reaching beyond the posterior margin of tergite III, and (4) tergites II–VIII with well-defined median gap in each row of tergal setae. Males of M. capeki have a variable and widespread type of male genital sac sclerite (Figs 30–34), also found in other Myrsidea from members of the Pipridae, and in other Neotropical Myrsidea from the Cardinalidae, Emberizidae and Thraupidae. Comparing genetic sequences between M. capeki and other known sequences of Neotropical Myrsidea (see Remarks below), the closest species was M. pagei Price & Johnson, 2009 from the Thraupidae. However, males of M. capeki differ from those of M. pagei by (1) the number of setae on tergite I (12– 18 in M capeki vs 7–10 in M. pagei), and (2) a shorter total length (1.17–1.25 in M. capeki vs 1.26–1.30 in M. pagei). Description. Female (n = 7). As in Figs 26 and 41. Hypopharyngeal sclerites fully developed. Length of dhs 10, 0.040–0.045; dhs 11, 0.088–0.105; ratio dhs 10/11, 0.36–0.51; ls5 0.05–0.06 long, latero-ventral fringe with 9– 10 setae. Gula with 4–5 setae on each side. Pronotum with 6 setae on posterior margin and 3 short spiniform setae at each lateral corner. First tibia with 3 outer ventro-lateral and 3–4 dorso-lateral setae. Metanotum not enlarged, with 6–8 marginal setae metasternal plate with 5–8 setae; metapleurites with 2–4 short strong spiniform setae. Femur III with 12–16 setae in ventral setal brush. Tergite I slightly enlarged with widely rounded posterior margin and continuous row of long setae reaching beyond the posterior margin of tergite III. Tergites II–III with convex posterior margin. Tergites II–VIII with well-defined median gap in each row of tergal setae (Fig. 26). Tergal setae: I, 19–22; II, 13–15; III, 12–17; IV, 13–16; V, 1 2–16; VI, 11–17; VII, 9–13; VIII, 8–11; Postspiracular setae very long on II, IV and VIII (0.39–0.45); long on I and VII (0.25–0.30); and short on III, V and VI (0.14–0.21). Inner posterior seta of last tergum longer than anal fringe setae with length 0.07–0.14; length of short lateral marginal seta of last segment, 0.03–0.06. Pleural setae: I–II, 6–8; III, 7–9; IV, 6–8; V, 5–7; VI, 5–6; VII, 4–6; VIII, 3–4. Pleurites V–VII with 0–3 slender and longer setae. Pleurite VIII with inner setae (0.05–0.13) as long as outer (0.05–0.09). Anterior margin of sternal plate II with a medial notch. Sternites V–VI narrow and arched. Sternal setae: I, 0; II, 5–6 (in one specimen one aster with 4) in each aster: s1, 0.06–0.08; s2, 0.06–0.07; s3, 0.05–0.08; s4, 0.03–0.06; s5, 0.03–0.05; s6, 0.03; with 12–16 marginal setae between asters, 4–6 medioanterior; III, 21–24; IV, 25–29; V, 28–34; VI, 28–31; VII, 15–20; VIII–IX, 10–12; and 8–12 setae on slightly serrated vulvar margin. Anal fringe formed by 29–39 dorsal and 29–32 ventral setae. Dimensions: TW, 0.44–0.46; POW, 0.34–0.37; HL, 0.28– 0.30; PW, 0.27–0.29; MW, 0.42–0.44; AWIV, 0.55–0.60; ANW, 0.20–0.22; TL, 1.33–1.40. Male (n = 7). As in Fig. 42. Similar to female except as follows: length of dhs 10, 0.037–0.045; dhs 11, 0.078– 0.100; ratio dhs 10/11, 0.37–0.52; ls5 0.04–0.06 long, latero-ventral fringe with 9–10 setae. Gula with 4–6 setae on each side. First tibia with 3 outer ventro-lateral and 3–5 dorso-lateral setae. Metanotum not enlarged with 4–8 marginal setae; metasternal plate with 6–8 setae; metapleurites with 2–3 short spiniform strong setae. Femur III with 10–13 setae in ventral setal brush. Abdominal segments with well-defined median gap in each row of tergal setae. Tergal setae: I, 12–18; II, 10–13; III, 12–14; IV, 11–14; V, 11–13; VI, 10–13; VII, 9–12; VIII, 6–10; Postspiracular setae same with the same pattern as in female but shorter. Length of inner posterior seta of last tergum, 0.06–0.11; short lateral marginal seta of last segment, 0.02. Pleural setae: I–III, 5–7; IV, 6–7; V, 5–6; VI, 4– 6; VII, 4–5; VIII, 3. Pleurites IV–VII with 1–3 slender and longer setae. Pleurite VIII with inner setae (0.08–0.10) almost three times as long as outer (0.03–0.04). Anterior margin of sternal plate II without a medial notch. Sternal setae: I, 0; II, 4–5 in each aster: s1, 0.06–0.08; s2, 0.05–0.07; s3–s4, 0.05–0.06; s5, 0.03–0.04; with 13–16 marginal setae between asters, 4–6 medioanterior; III, 18–23; IV, 21–24; V, 23–30; VI, 23–28; VII, 14–19; VIII, 4–8; remainder of plate, 5–8; and with 3 setae posteriorly; with 8 internal anal setae. Genital sac sclerite as in Figs 30– 34. Dimensions: TW, 0.41–0.44; POW, 0.32–0.33; HL, 0.27–0.29; PW, 0.25–0.27; MW, 0.36–0.41; AWIV, 0.46– 0.48; GW, 0.11; GSL, 0.08–0.09; TL, 1.17–1.25. Etymology. This species is named in honour of our colleague and friend Miroslav Čapek (Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic), a respected Czech ornithologist who participated in many of our fieldtrips, in recognition of his friendship and unmatched enthusiasm in the study of birds. Remarks. This is the first record of chewing lice from Chiroxiphia caudata. A portion of COI gene was sequenced from specimens of M. capeki from Paraguay (GenBank MF563532). Comparing our sequence with other known sequences of Neotropical Myrsidea, the divergences exceeded 18% in all cases. The closest was that of M. pagei (ex Ramphocelus dimidiatus Lafresnaye, 1837, family Thraupidae, GenBank FJ 171287), with a pdistance of 18.2%. These sequence divergences are large enough to confirm M. capeki as a new, separate species., Published as part of Kolencik, Stanislav, Sychra, Oldrich, Papousek, Ivo, Kuabara, Kamila M. D., Valim, Michel P. & Literak, Ivan, 2018, New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves), pp. 401-431 in Zootaxa 4418 (5) on pages 417-418, DOI: 10.11646/zootaxa.4418.5.1, http://zenodo.org/record/1244956, {"references":["Price, R. D. & Johnson K. P. (2009) Five new species of Myrsidea Waterston (Phthiraptera: Menoponidae) from tanagers (Passeriformes: Thraupidae) in Panama. Zootaxa, 2200, 61 - 68."]}

Myrsidea klimesi Sychra, 2006 Myrsidea klimesi Sychra, 2006 in Sychra et al. 2006: 55, figs 10–11, 14–15. Type host. Formicarius analis (d´Orbigny & Lafresnaye, 1837)—black-faced ant-thrush. Type locality. Hitoy Cerere BR, Provincia Limón, Costa Rica. Material examined. Ex Formicarius analis: 7 nymphs II, Zona Protectora Las Tablas, Costa Rica (08°54'N, 82°47'W), 21 August 2010, O. Sychra & I. Literak (MMBC). Remarks. Although we examined only nymphs, we believe they belong to M. klimesi because they are from the type host species, even if from a different locality in Costa Rica., Published as part of Kolencik, Stanislav, Sychra, Oldrich, Papousek, Ivo, Kuabara, Kamila M. D., Valim, Michel P. & Literak, Ivan, 2018, New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves), pp. 401-431 in Zootaxa 4418 (5) on page 407, DOI: 10.11646/zootaxa.4418.5.1, http://zenodo.org/record/1244956, {"references":["Sychra, O., Literak, I., Capek, M. & Havlicek, M. (2006) Chewing lice (Phthiraptera) from typical antbirds and ground antbirds (Passeriformes: Thamnophilidae, Formicariidae) from Costa Rica, with descriptions of three new species of the genera Formicaphagus and Myrsidea. Zootaxa, 1206, 47 - 61."]}

Myrsidea leucophthalmi, new species (Figs 2, 6–7, 18–19) Type host. Automolus leucophthalmus (Wied, 1821)—white-eyed foliage-gleaner. Type locality. San Rafael National Park, Paraguay (26°30'S, 55°47'W). Type material. Ex Automolus leucophthalmus: holotype ♀, San Rafael National Park, Paraguay (26°30'S, 55°47'W), 18 and 20 August 2012, I. Literak (MMBC). Paratypes: 2♀, 3♂ with the same data as holotype (MMBC). Diagnosis. Myrsidea leucophthalmi n. sp. is morphologically close to M. ochrolaemi Sychra [in Sychra et al.], 2007 in the following characters: (1) male genital sac sclerite, (2) female metanotum slightly enlarged with rounded posterior margin and (3) shape of abdominal tergites of female. However, M. leucophthalmi is easily distinguished from M. ochrolaemi by (1) fewer setae on: female tergite I (19–21 vs 22–33), female tergites II–IV (14–17 vs 18–33); male tergite IV (12–14 vs 15–20) and tergite V (12–13 vs 14–17); (2) presence of continuous row of setae on tergite I only (vs continuous row of setae on tergite I–III in M. ochrolaemi) (3) fewer setae on female sternites IV and V (32–37 vs 39–48). Description. Female (n = 3). As in Figs 2 and 18. Hypopharyngeal sclerites fully developed. Length of dhs 10, 0.043–0.063; dhs 11, 0.108–0.127; ratio dhs 10/11, 0.39–0.54; ls5, 0.03 long, latero-ventral fringe with 9–10 setae. Gula with 3–4 setae on each side. Pronotum with 6 setae on posterior margin and 3 short spiniform setae at each lateral corner. Prosternal plate with rounded anterior margin (Fig. 2). First tibia with 3 outer ventro-lateral and 4 dorso-lateral setae. Metanotum slightly enlarged with rounded posterior margin, with 11–15 marginal setae; metasternal plate with 6–8 setae; metapleurites with 3–4 short strong spiniform. Femur III with 14–19 setae in ventral setal brush. Tergites not enlarged and unmodified, only tergite I and II with very slightly rounded posterior margin (Fig. 2). Abdominal segments with continuous row of setae on tergite I and median gap in the row of tergal setae on tergites II–VIII. Tergal setae: I, 19–21; II, 17; III, 15–17; IV, 14–16; V, 14; VI, 12–14; VII, 10–12; VIII, 4– 5. Postspiracular setae very long on II, IV and VIII (0.45–0.50); long on I and VII (0.26–0.37); and short on III, V and VI (0.11–0.23). Inner posterior seta of last tergum not longer than anal fringe setae with length 0.02–0.05; length of short lateral marginal seta of last segment, 0.05. Pleural setae: I, 7–9; II, 9–10; III, 8–11; IV, 8–9; V, 7–8; VI, 6; VII, 5; VIII, 3. Pleurites mostly with short spine-like setae; slender and longer setae on pleurites IV–VII, 0– 2; without anterior setae. Pleurite VIII with inner setae (0.05–0.06) as long as outer (0.05–0.06). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 5 in each aster, aster setae length: s1, 0.10–0.12; s2, 0.07– 0.11; s3, 0.05–0.06; s4, 0.05–0.06; s5, 0.03–0.04; with 11–13 marginal setae between asters, 4–6 medioanterior; III, 20–24; IV, 32–37; V, 33–37; VI, 30–31; VII, 16–19; VIII–IX, 13–16; and 14–18 setae on deeply serrated vulvar margin; in one specimen sternites IV–V with 1 medioanterior seta. Anal fringe formed by 43–51 dorsal and 45–47 ventral setae. Dimensions: TW, 0.49–0.50; POW, 0.37; HL, 0.34–0.35; PW, 0.30–0.32; MW, 0.48–0.51; AWIV, 0.65–0.66; ANW, 0.27; TL, 1.50–1.55. Male (n = 3). As in Fig. 19. Similar to female except as follows: length of dhs 10, 0.048–0.050; dhs 11, 0.100– 0.113; ratio dhs 10/11, 0.44–0.48; ls5 0.03–0.04 long, latero-ventral fringe with 9–10 setae. Gula with 3 setae on each side. Metanotum not enlarged with 8–10 marginal setae; metasternal plate with 7 setae; metapleurites with 3– 4 short spiniform strong setae. Femur III with 11–15 setae in ventral setal brush. Abdominal segments with welldefined median gap in each row of tergal setae. Tergal setae: I, 12–16; II, 12–15; III, 1 1–15; IV, 12–14; V, 12–13; VI, 12–14; VII, 11; VIII, 4–6; Postspiracular setae very long on II, IV and VIII (0.45–0.49); long on I and VII (0.20–0.31); and short on III, V and VI (0.07–0.12). Length of inner posterior seta of last tergum, 0.04–0.05; short lateral marginal seta of last segment, 0.02. Pleural setae: I, 5–7; II, 7–9; III, 7–8; IV, 6–8; V, 5–7; VI, 4–5; VII, 4; VIII, 3. Pleurites I–III with only short spine-like setae; pleurites IV–VII with 1–2 slender setae; without anterior setae. Pleurite VIII with inner setae (0.05–0.06) twice as long as outer (0.02–0.03). Anterior margin of sternal plate II with a medial notch. Sternal setae: I, 0; II, 5 in each aster: s1, 0.08–0.10; s2, 0.07–0.10; s3, 0.06–0.07; s4, 0.04– 0.06; s5, 0.03–0.04; with 12–13 marginal setae between asters, 5–6 medioanterior; III, 17–21; IV, 24–28; V, 28–30; VI, 25–28; VII, 19–20; VIII, 14; remainder of plate, 13–15; and with 5–6 setae posteriorly; in one species sternite VIII with 1 medioanterior seta. With 8 internal anal setae. Genital sac sclerite as in Figs 6–7. Dimensions: TW, 0.43–0.45; POW, 0.32–0.33; HL, 0.30–0.32; PW, 0.26–0.28; MW, 0.39–0.40; AWIV, 0.48–0.49; GW, 0.08–0.12; GSL, 0.08–0.12; TL, 1.28–1.29. Etymology. The species epithet is a noun in apposition derived from the species name of the type host. Remarks. This is the first record of a chewing louse from Automolus leucophthalmus. A portion of COI gene was sequenced from specimens of M. leucophthalmi from Paraguay (GenBank MF563529). As expected, the closest species among other published sequences of Neotropical Myrsidea was M. ochrolaemi (ex Automolus ochrolaemus (Tschudi, 1844), family Furnariidae, GenBank JN638820), with a sequence divergence of 11.7%. This divergence is close to the limit of accepted interspecific variation (see Price et al. 2008a; Kolencik et al. 2017) but, together with their morphological differences, we are confident that M. leucophthalmi and M. ochrolaemi represent separate species., Published as part of Kolencik, Stanislav, Sychra, Oldrich, Papousek, Ivo, Kuabara, Kamila M. D., Valim, Michel P. & Literak, Ivan, 2018, New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves), pp. 401-431 in Zootaxa 4418 (5) on pages 408-409, DOI: 10.11646/zootaxa.4418.5.1, http://zenodo.org/record/1244956, {"references":["Sychra, O., Literak, I., Capek, M. & Havlicek, M. (2007) Chewing lice (Phthiraptera) from ovenbirds, leaftossers and woodcreepers (Passeriformes: Furnariidae: Furnariinae, Sclerurinae, Dendrocolaptinae) from Costa Rica, with descriptions of four new species of the genera Rallicola and Myrsidea. Caribbean Journal of Science, 43 (1), 117 - 126. https: // doi. org / 10.18475 / cjos. v 43 i 1. a 11","Price, R. D., Johnson, K. P. & Dalgleish, R. C. (2008 a) Myrsidea Waterston (Phthiraptera: Menoponidae) from wrens (Passeriformes: Troglodytidae), with descriptions of three new species. Zootaxa, 1740, 59 - 65.","Kolencik, S., Sychra, O., Papousek, I. & Literak, I. (2017) Where are the species limits? Morphology versus genetics in Neotropical chewing lice of the genus Myrsidea (Phthiraptera: Menoponidae), with description of three new species. Zootaxa, 4324 (1), 161 - 179. https: // doi. org / 10.11646 / zootaxa. 4324.1.9"]}

Myrsidea oleaginei Price, Hellenthal & Dalgleish, 2005 Myrsidea oleaginei Price, Hellenthal & Dalgleish, 2005: 13, figs 15–16. Type host. Mionectes oleagineus (Lichtenstein, MHC, 1823)—ochre-bellied flycatcher. T ype locality. Simla near Arima, Trinidad & Tobago. Material examined. Ex Mionectes oleagineus: 3♀, 3♂, Hitoy Cerere BR, Provincia Limón, Costa Rica (09°40'N 85°05'W), 18 August 2004, I. Literak, M. Capek & M. Havlicek (MMBC); 3♀, 1♂, Centro URKU, Tarapoto, Perú (06°27'S, 76°21'W), 8 August 2011, I. Literak (MMBC); 4♀, 1♂, Atlántida, Tela, Lancetilla Botanical Garden, Honduras (15°44'N, 87°27'W), 10–18 August 2014, I. Literak (MMBC). Remarks. This is the first record of Myrsidea oleaginei in Honduras. Our specimens differ from the original description of M. oleaginei by setal counts and dimensions, as follows [data from Price et al. (2005) are in parentheses]: Female (n = 10). Metanotum with 10–11 (8–10) marginal setae. Tergal setae: I, 6–9 (8–13); III, 1 2–15 (10– 14). Anterior margin of sternal plate II with a medial notch. Sternal setae: II, 4–5 (4) in each aster; III, 24–25 (20– 24); IV, 30–36 (22–29); V, 29–32 (24–31); VI, 22–27 (19–25); VIII–IX, 7–9; and 9–11 setae on serrated vulvar margin (total number of VIII–IX sternal setae is 1 6–20 vs 18–22 in Price et al. 2005). Dimensions: PW, 0.26–0.29 (0.25–0.28); ANW, 0.19–0.21 (0.17–0.20). Male (n = 5). Metanotum with 10 (6–8) marginal setae. Tergal setae: I, 10 (7–9); II, 12 (8–11); VI, 14 (10–13). Sternal setae: II, 3–4 (4) in each aster; III, 22 (17–20); V, 27 (19–26); VI, 23 (16–22). Dimensions: TW, 0.40 (0.36– 0.39); PW, 0.27 (0.23–0.26); MW, 0.34 (0.30–0.33); AWIV, 0.43 (0.38–0.42); GSL, 0.10 (0.09)., Published as part of Kolencik, Stanislav, Sychra, Oldrich, Papousek, Ivo, Kuabara, Kamila M. D., Valim, Michel P. & Literak, Ivan, 2018, New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves), pp. 401-431 in Zootaxa 4418 (5) on page 428, DOI: 10.11646/zootaxa.4418.5.1, http://zenodo.org/record/1244956, {"references":["Price, R. D., Hellenthal, R. A. & Dalgleish, R. C. (2005) The genus Myrsidea Waterston (Phthiraptera: Menoponidae) from tyrant-flycatchers (Passeriformes: Tyrannidae), with descriptions of 13 new species. Zootaxa, 1048, 1 - 20."]}

Myrsidea spellmani Price, Johnson & Dalgleish, 2008 Myrsidea spellmani Price, Johnson & Dalgleish, 2008b: 58. Type host. Hylophylax naevioides (Lafresnaye, 1847) —spotted antbird. Type locality. Rio Mono, Panamá. Material examined. Ex Hylophylax naevioides: 2 nymphs II, Rincón de la Vieja National Park, Sector Santa María, Sendero del Padre, Costa Rica (10°46'N, 85°18'W), 20 August 2009, O. Sychra & I. Literak. Remarks. Although we only examined nymphs, we believe they are M. spellmani considering that our specimens were collected from the type host species., Published as part of Kolencik, Stanislav, Sychra, Oldrich, Papousek, Ivo, Kuabara, Kamila M. D., Valim, Michel P. & Literak, Ivan, 2018, New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves), pp. 401-431 in Zootaxa 4418 (5) on page 420, DOI: 10.11646/zootaxa.4418.5.1, http://zenodo.org/record/1244956, {"references":["Price, R. D., Johnson, K. P. & Dalgleish, R. C. (2008 b) Five new species of Myrsidea Waterston (Phthiraptera: Menoponidae) from antshrikes and antbirds (Passeriformes: Thamnophilidae). Zootaxa, 1819, 55 - 62."]}

Myrsidea pitangi Price, Hellenthal & Dalgleish, 2005 (Fig. 40) Myrsidea pitangi Price, Hellenthal & Dalgleish, 2005: 6, figs 4–6. Type host. Pitangus sulphuratus (Linnaeus, 1766) — great kiskadee. Type locality. Tumpuna Rd, Trinidad & Tobago. Material examined. Ex Pitangus sulphuratus: 1♂ Los Tres Gigantes Biological Station in the Paraguayan Pantanal, Paraguay (20°04'S, 50°09'W), 7 September 2012, I. Literak (MMBC); 1♀ Atlántida, Tela, Lancetilla Botanical Garden, Honduras (15°44'N, 87°27'W), 13 August 2014, I. Literak (MMBC). Remarks. Myrsidea pitangi was known from Trinidad & Tobago and Costa Rica, and our records are the first from Honduras, Paraguay and Perú. Our specimens differ from the original description of M. pitangi by setal counts and dimensions, as follows [data from Price et al. (2005) are in parentheses]: Female (n = 1). Metanotum not enlarged, with 7 (10–11) marginal setae. Tergal setae: I, 8 (10–11); II, 11 (12– 15); V, 11 (13–14); VII, 9 (6–7). Anterior margin of sternal plate II with a medial notch. Sternal setae: III, 34 (25– 31); VII, 19 (13–15); Anal fringe with 41 (42–46) dorsal setae. Dimensions: HL, 0.39 (0.35–0.38); PW, 0.34 (0.35– 0.37); MW, 0.50 (0.53–0.55); AWIV, 0.68 (0.73–0.79); ANW, 0.26 (0.28–0.29); TL, 1.72 (1.76–1.79). Male (n =1). Tergal setae: I, 7 (8–11). Sternal setae: VII, 18 (15–16); VIII, 9 (7). Genital sac sclerite as in Fig. 40. Dimensions: PW, 0.30 (0.32–0.34); GSL, 0.12 (about 0.10 long)., Published as part of Kolencik, Stanislav, Sychra, Oldrich, Papousek, Ivo, Kuabara, Kamila M. D., Valim, Michel P. & Literak, Ivan, 2018, New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves), pp. 401-431 in Zootaxa 4418 (5) on page 429, DOI: 10.11646/zootaxa.4418.5.1, http://zenodo.org/record/1244956, {"references":["Price, R. D., Hellenthal, R. A. & Dalgleish, R. C. (2005) The genus Myrsidea Waterston (Phthiraptera: Menoponidae) from tyrant-flycatchers (Passeriformes: Tyrannidae), with descriptions of 13 new species. Zootaxa, 1048, 1 - 20."]}

Myrsidea dalgleishi Valim, Price & Johnson, 2011 Myrsidea sp. 2; Sychra et al. 2007: 123, fig. 13. Myrsidea dalgleishi Valim, Price & Johnson, 2011: 10, figs 28–29, 33–35. Type host. Glyphorynchus spirurus (Vieillot, 1819) —wedge-billed woodcreeper. Type locality. San José, Tinamaste, 12 km SW San Isidro de El General, Costa Rica. Material examined. Ex Glyphorynchus spirurus: 1♀, Barbilla National Park, Provincia Limón, Costa Rica (09°59'N, 85°27'W), 3 September 2004, I. Literak, M. Capek & M. Havlicek (INBIO—O. Sychra CR 10). Remarks. Here we confirm that a female described as “ Myrsidea sp. 2” by Sychra et al. (2007) is conspecific with M. dalgleishi originally described from G. spirurus from a different location in Costa Rica. Our specimen differ from the original description of M. dalgleishi by setal counts and dimensions, as follows [data from Valim et al. (2011) are in parentheses]: Female (n = 1). Length of dhs 10, 0.065 (0.03); dhs 11, 0.102 (0.09); ratio dhs 10/11, 0.64 (0.33). Gula with 5– 6 (4–5) setae on each side. Tergal setae: II, 12 (8–10); IV, 12 (9–11); VI, 7 (10–11); VII, 4 (7–8); VIII, 4 (5–6). Sternal setae: IV, 26 (22–24); VI, 23 (19–21). Dimensions: TW, 0.42 (0.41); PW, 0.26 (0.24–0.25); AWIV, 0.53 (0.50–0.51).

Myrsidea sp. 2 Material examined. Ex Leptopogon amaurocephalus Tschudi, 1846 —sepia-capped flycatcher: 2♀, 1♂ Centro URKU, Tarapoto, Perú (06°27'S, 76°21'W), 8 August 2011, I. Literak (MMBC); 4♀, 1♂ San Rafael National Park, Paraguay (26°30'S, 55°47'W), 18 and 20 August 2012, I. Literak (MMBC). Remarks. This is the first record of Myrsidea from Leptopogon amaurocephalus.Our specimens are very close to Myrsidea contopi Price, Hellenthal & Dalgleish, 2005 ex Contopus cinereus (Spix, 1825) from Trinidad & Tobago by the shape of metanotum and tergites of female and similar type of genital sac sclerite in male, but differ by setal counts and dimensions, as follows [data from Price et al. (2005) are in parentheses]: Female (n = 6). Metanotum with 8–11 (8–9) marginal setae. Tergal setae: I, 10–13 (6–8); II, 11–13 (9–11); III, 10–15 (11–13); IV, 9–13 (10–11); V, 9–12 (7–9); VI, 10–12 (7–9); VII, 6–11 (4); VIII, 4–6 (4). Sternal setae: II, with 14–19 marginal setae between asters, 4–7 medioanterior (in total 24 marginal and medioanterior setae); III, 22–24 (19–21); IV, 28–35 (30–32); V, 30–36 (34–35); VI, 25–36 (30); VII, 16–18 (12–14); VIII–IX, 7–11 (22–25 including vulvar setae); and 10–13 setae on deeply serrated vulvar margin. Anal fringe formed by 34–36 (35–36) dorsal setae. Dimensions: TW, 0.44–0.45 (0.43–0.44); HL, 0.29–0.31 (0.31–0.32); PW, 0.27–0.32 (0.27–0.28); MW, 0.39–0.41 (0.42–0.43); AWIV, 0.51–0.54 (0.56–0.58); ANW, 0.20–0.23 (0.20–0.21); TL, 1.40–1.42 (1.32– 1.37). Male (n = 2). Metanotum with 5–9 (7–8) marginal setae. Tergal setae: I, 8–10 (5–6); III, 14–15 (7–11); IV, 11– 15 (6–10); V, 11–14 (6–8); VI, 9–13 (6); VII, 7–15 (4–6); VIII, 5–7 (4). Sternal setae: III, 21 (17–20); IV, 25–30 (23–29); V, 29–32 (28–30); VI, 28–30 (22–27); VII, 16–21 (13–16); VIII, 8–11 (6–7). Genital sac sclerite as in Figs 36–37. Dimensions: TW, 0.37–0.40 (0.40–0.41); MW, 0.32–0.36 (0.36–0.37); AWIV, 0.40–0.44 (0.45–0.46); TL, 1.05–1.18 (1.18–1.23). Remarks. A portion of COI gene was sequenced from specimens of Myrsidea sp. 2 ex Leptopogon amaurocephalus from Paraguay (GenBank MF563537). Comparing our sequence with other known sequences of Neotropical Myrsidea, the divergences exceeded 16% in all cases including those of the two morphologically closest species: M. elaeniae Price, Hellenthal & Dalgleish, 2005 (ex Elaenia flavogaster (Thunberg, 1822), GenBank KF048117), with a p-distance of 19.5%, and M. cnemotriccola Valim & Weckstein, 2013 (ex Cnemotriccus fuscatus, GenBank KF048124), with a p-distance of 20.6%, both from species of Tyrannidae. The closest species was M. lightae Valim & Weckstein, 2013 from the Cardinalidae (GenBank EU289211), with a pdistance of 16.9%. These results show that our specimens differ from all Neotropical Myrsidea with known sequences of COI. Despite some morphological differences (especially the smaller number of setae on tergite I in both sexes), we found our specimens to be very close to M. contopi. However, molecular data from M. contopi from the type-host are necessary to confirm that our samples belong to M. contopi. Also, more morphological and genetic data are needed to evaluate the status of Myrsidea from Leptopogon amaurocephalus from different localities, especially because our single males from Paraguay and Perú show some differences in tergal setae (tergites VI–VII of male from Perú with 7–9 setae vs 13–15 in male from Paraguay) and measurements (TW 0.40 for male from Perú vs 0.37 for male from Paraguay). According to these characters, the male from Perú is conspecific with M. contopi, while the specimen from Paraguay could represent a separate species or subspecies. However, the male from Paraguay share the same shape of male genital sac sclerite with M. contopi, while that from Perú differs in this character (see Figs 36 and 37), but such difference maybe the result of a distortion. Contrary to Price et al. (2005), we think that it is not possible to use the tip of the male genital sac sclerite as a single character to separate species of Myrsidea. Although both host species (Contopus cinereus and Leptopogon amaurocephalus) are not closely related (Rheindt et al. 2008), they have almost the same geographical distribution (Clements et al. 2017), implying that host-switching of lice between these host species (see Price et al. 2003) is a possible explanation for the unusual host distribution of these specimens of Myrsidea., Published as part of Kolencik, Stanislav, Sychra, Oldrich, Papousek, Ivo, Kuabara, Kamila M. D., Valim, Michel P. & Literak, Ivan, 2018, New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves), pp. 401-431 in Zootaxa 4418 (5) on page 423, DOI: 10.11646/zootaxa.4418.5.1, http://zenodo.org/record/1244956, {"references":["Price, R. D., Hellenthal, R. A. & Dalgleish, R. C. (2005) The genus Myrsidea Waterston (Phthiraptera: Menoponidae) from tyrant-flycatchers (Passeriformes: Tyrannidae), with descriptions of 13 new species. Zootaxa, 1048, 1 - 20.","Valim, M. P. & Weckstein, J. D. (2013) A drop in the bucket of the megadiverse chewing louse genus Myrsidea (Phthiraptera, Amblycera, Menoponidae): ten new species from Amazonian Brazil. Folia Parasitologica, 60, 377 - 400. https: // doi. org / 10.14411 / fp. 2013.040","Rheindt, F. E., Norman, J. A. & Christidis, L. (2008) Phylogenetic relationships of tyrant-flycatchers (Aves: Tyrannidae), with an emphasis on the elaeniine assemblage. Molecular Phylogenetics and Evolution, 46, 88 - 101. https: // doi. org / 10.1016 / j. ympev. 2007.09.011","Clements, J. F., Schulenberg, T. S., Iliff, M. J., Roberson, D., Fredericks, T. A., Sullivan, B. L. & Wood, C. L. (2017) The eBird / Clements checklist of birds of the world: v 2017. Available from: http: // www. birds. cornell. edu / clementschecklist / download / (accessed 14 June 2017)"]}

Myrsidea barbati Price, Hellenthal & Dalgleish, 2005 Myrsidea barbati Price, Hellenthal & Dalgleish, 2005: 8, figs 9–10. Type host. Myiobius barbatus (J. F. Gmelin, 1789) —whiskered flycatcher. Type locality. 12 km SW San Isidro de El General, Tinamaste, San José Province, Costa Rica. Material examined. Ex Myiobius sulphureipygius (P.L. Sclater, 1857) —sulphur-rumped flycatcher: 1♀, Hitoy Cerere BR, Provincia Limón, Costa Rica (09°40'N, 85°05'W), 28 August 2004, I. Literak, M. Capek & M. Havlicek (MMBC). Remarks. This is the first record of a louse from Myiobius suphureipygius. Our specimen differs slightly from the original description of M. barbati by some setal counts, as follows [data from Price et al. (2005) are in parentheses]: Female (n = 1). Sternal setae: IV, 31 (24–29); V, 34 (28–33). Anal fringe with 32 (25–31) dorsal setae., Published as part of Kolencik, Stanislav, Sychra, Oldrich, Papousek, Ivo, Kuabara, Kamila M. D., Valim, Michel P. & Literak, Ivan, 2018, New species and additional data on the chewing louse genus Myrsidea (Phthiraptera: Menoponidae) from wild Neotropical Passeriformes (Aves), pp. 401-431 in Zootaxa 4418 (5) on page 422, DOI: 10.11646/zootaxa.4418.5.1, http://zenodo.org/record/1244956, {"references":["Price, R. D., Hellenthal, R. A. & Dalgleish, R. C. (2005) The genus Myrsidea Waterston (Phthiraptera: Menoponidae) from tyrant-flycatchers (Passeriformes: Tyrannidae), with descriptions of 13 new species. Zootaxa, 1048, 1 - 20."]}