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Platystethynium (Platypatasson) earlyi Huber, sp. n. (Hymenoptera: Mymaridae), is described from both sexes reared from an egg of Rhaphidophoridae (Orthoptera) found in an old mining tunnel in New Zealand. The male is micropterous and has lateral ocelli but no median ocellus, a unique feature in Mymaridae found so far only in males of Platystethynium Ogloblin species. The remaining described Eastern Hemisphere species of Platystethynium are discussed and Platystethynium glabrum Jin & Li, syn. n., is placed in synonymy under P. onomarchicidum Ogloblin. A key to females, and males where known, of the described Eastern Hemisphere species of Platystethynium is given.

Separate identification keys for females, and for males where known, of the 40 genera of Mymaridae (Hymenoptera: Chalcidoidea) in the Afrotropical region are given. The subgenera of four genera are also included in the key to females. The genera are illustrated with over 300 photographs. The 122 named, valid species reported from the region are catalogued. Reliable host records are reported for 6 genera and 11 species from rearings undertaken in the region. An appendix lists the 27 species from northern Africa and offshore islands (Canary Islands, Madeira) but not recorded in the Afrotropical region as defined in this publication. Camptoptera (Zemicamptoptera) Ogloblin & Annecke, syn. n. is synonymized with Camptoptera (Camptoptera) Foerster. Eofoersteria Mathot, syn. n. is synonymized with Camptoptera Foerster and is treated as subgenus C. (Eofoersteria) Mathot, stat. n.; its type species Eofoersteria camptopteroides Mathot is transferred to Camptoptera as C. (Eofoersteria) camptopteroides (Mathot), comb. n. Polynema megacephala (Risbec) is transferred to Lymaenon as L. megacephala (Risbec), comb. n. Limacis opuntiae Risbec is transferred to Encarsia Foerster (Hymenoptera: Aphelinidae) as E. opuntiae (Risbec), comb. n. A few corrections to Huber et al. (2020) are given.

A checklist of 1246 extant, described species, classified in 346 genera in 18 families of Chalcidoidea (Hymenoptera) are reported from Canada, Alaska (USA) and Greenland (Denmark) based on examined specimens and published records up to December 31, 2020. Of the reported species, 1214 (in 345 genera in 18 families) are listed from Canada, 113 (in 58 genera in 10 families) from Alaska, and 26 (in 22 genera in 4 families) from Greenland. The list includes 235 new species records and 53 new generic records for Canada (no new family records). Forty-one new species records, 22 new generic records and the families Chalcididae and Eurytomidae are newly reported for Alaska. No new records were found for Greenland. Two species (in one genus) of Mymarommatoidea are reported from Canada. For each species in Canada, distribution is tabulated by province or territory, except the province of Newfoundland and Labrador is divided into the island of Newfoundland and the region of Labrador. The inclusion of known species from Alaska and Greenland results in the first comprehensive distributional checklist for the entire northern part of the Nearctic region. A brief review of the history of cataloguing Chalcidoidea in North America and a comparison of this checklist with four published checklists from the Palaearctic region is provided.

An overview of the Oriental species of the nominate subgenus of Camptopteroides Viggiani (Hymenoptera: Mymaridae) is given. Two new species, C. (Camptopteroides) formosa Manickavasagam & Sankararaman sp. n. from India and C. (Camptopteroides) reducta Triapitsyn sp. n. from Thailand and Malaysia, are described, and C. formosa additionally compared to two unnamed species. The holotype male of the type species of this genus, C. armata Viggiani from Sri Lanka, is diagnosed and illustrated. A key to Old World species of Camptopteroides is provided.

Triapitsyn, Serguei V., Dominguez, Chrysalyn, Huber, John T., Japoshvili, George, Heraty, John M. (2020): Morphological and molecular separation between Macrocamptoptera grangeri Soyka and M. metotarsa (Girault) (Hymenoptera: Mymaridae). Journal of Natural History 54 (9): 585-596, DOI: 10.1080/00222933.2020.1766143

A neotype for Anaphes flavipes (Foerster, 1841) (Hymenoptera: Mymaridae), a biological control agent of Oulema melanopus (Linnaeus, 1758) (Coleoptera: Chrysomelidae), is designated. The extensive literature on A. flavipes is compiled and the morphological variability of selected morphological structures of numerous reared specimens from across its presently known geographic range (mainly eastern Nearctic and western Palearctic) is described. Anaphes flavipes is compared with what appears to be morphologically and biologically the most similar species, A. nipponicus Kuwayama, 1932, from Japan, which is briefly redescribed. Anaphes auripes Walker, 1846, syn. nov., is placed in synonymy under A. flavipes. The following new country and state records for A. flavipes are provided: Czech Republic, Ukraine, Canada (Nova Scotia), USA (Virginia).

Two species of Anaphes Haliday with distinctive females are described from India (A. triapitsyni Anwar & Zeya, sp. nov.) or from India and Indonesia (A. kailashchandrai Anwar & Zeya, sp. nov.). The only other Anaphes species known to occur in India is A. quinquearticulatus Huber & Triapitsyn because previous records of A. pallipes (Ashmead) and A. pullicrurus (Girault) are based on misidentifications. These latter two names are therefore removed from the faunal list of India. An illustrated key to females of the three described species of Anaphes known from India is given. The described species of Anaphes known from Australia are also briefly reviewed, with type material of four previously unillustrated species being newly imaged and compared to the Indian species.

The Walter Soyka species of Anaphes Haliday are reviewed and placed in context among the remaining world species. An analysis of his descriptions and identification keys is presented, and discussed in light of a broader interpretation of intraspecific variation in Anaphes species than Soyka accepted. An illustrated diagnosis of Anaphes is given and the species in Europe considered to be valid are keyed—14 species in Anaphes ( Anaphes ) and 15 species in Anaphes ( Patasson ). The 244 names of world Anaphes are tabulated in various ways and their type localities, if known, are mapped. All available valid names and their synonyms, mostly from among the 155 nominal species described by Soyka, are catalogued, with details of type material and collecting information. A total of 167 synonyms are listed, 17 of which are synonyms proposed by earlier authors and 149 of which are proposed as new synonyms. Lectotypes are designated for Mymar ferreirei Soyka and Yungaburra acutiventris Soyka. Nine nomina dubia , 2 names of fossil species that most likely do not belong to Anaphes , 3 unavailable names and 20 species transferred to other genera are listed separately; among the latter, Anagrus foersteri (Ratzeburg) is transferred to Erythmelus Enock as E. foersteri (Ratzeburg), comb. n. Host records published from 1985–2015 are tabulated; most are from the literature but a few are from unpublished records found on slide mounted Anaphes specimens in various collections, mostly in Europe. The merits of classifying the available names of nominal species into an earlier classification with subgenera Anaphes ( Anaphes ) and Anaphes ( Patasson ) instead a later classification consisting of species groups within Anaphes ( Anaphes ) and Anaphes ( Yungaburra ) are discussed; the earlier classification is preferred.

Chrysoctonoides longisetosa Huber & Triapitsyn (Hymenoptera: Mymaridae), gen. n. and sp. n., is described from Australia. It is compared with the related genus Chrysoctonus, known from Africa and the New World. Myrmecomymar Yoshimoto, syn. n., is synonymized under Chrysoctonus Mathot and its type species is transferred to Chrysoctonus as Chrysoctonus masneri (Yoshimoto), comb. n.

Three New World species are transferred from Polynema Haliday to other genera of Mymaridae and redescribed based on examination of their type specimens: Polynema albicoxa Ashmead to Acmopolynema Ogloblin as Acmopolynema albicoxa (Ashmead), comb. n., Polynema porteri (Brethes) to Agalmopolynema Ogloblin as Agalmopolynema porteri (Brethes), comb. n., and Polynema giraulti Perkins, for which a lectotype is designated, to Stephanodes Enock as Stephanodes giraulti (Perkins), comb. n. Agalmopolynema shajovskoii Fidalgo, syn. n. is synonymized under Agalmopolynema porteri ; Polynema ( Dorypolynema ) gaucho Triapitsyn & Aquino, syn. n. and P. grenadensis Ashmead, syn. n., are synonymized under Polynema ( Dorypolynema ) magniceps Ashmead, for which taxonomic notes are given. Caenomymar Yoshimoto, syn. n. is synonymized under Omyomymar Schauff, and its only species Caenomymar howdeni Yoshimoto is transferred to Omyomymar as Omyomymar howdeni (Yoshimoto), comb. n. Gonatocerus chula Triapitsyn & Bernal is transferred to Cosmocomoidea Howard as Cosmocomoidea chula (Triapitsyn & Bernal), comb. n. Erythmelus mirus Girault is transferred to Cleruchoides Lin & Huber as Cleruchoides mirus (Girault), comb. n. and compared with Cleruchoides noackae Lin & Huber, a species introduced from Australia into South America as a biological control agent of Thaumastocoris peregrinus Carpintero & Dellape (Hemiptera: Thaumastocoridae), an introduced pest of Eucalyptus . Four spelling corrections are made to species names in Cosmocomoidea and Lymaenon Walker.

The purpose of this application, under Articles 80.9 and 81.1 of the Code, is to designate Anaphes fuscipennis Haliday, 1833 (family mymaridae) as the type species of Anaphes Haliday, 1833. The nominal species A. punctum Shaw, 1798 is currently the type species by subsequent designation and is placed on the Official List of Specific Names in Zoology, but no type specimen of A. punctum existed until Huber (2011) showed conclusively that punctum belongs to the genus Camptoptera Foerster, 1856 and designated a neotype. It is clearly unacceptable that the type species of a genus does not belong to that genus so a request to the Commission to change the type species to the only other originally included species of Anaphes, A. fuscipennis, is presented, to maintain the current usage.

Ichneumon punctum Shaw, 1798, currently the type species of Anaphes, is shown to be a species of Camptoptera and is transferred to that genus as Camptoptera punctum Shaw, comb. n. A neotype from England, the type locality, is designated and described in order to define the species objectively and thus settle over two centuries of doubt about the species identity. Camptoptera punctum is compared to C. foersteri Girault, newly reported from the UK, and C. saintpierrei, the only other species so far reported from the UK. All three species are illustrated. Camptoptera aula, Debauche, syn. n., is synonymized under C. foersteri, whose host is likely Cis sp., possibly boleti Scopoli (Coleoptera: Ciidae).

Three species of Ooctonus (Hymenoptera: Mymaridae) are described from South Africa: O. albiclavus Huber, sp. n., O. capensis Huber, sp. n., and O. infuscatus Huber, sp. n. They represent the first records of Ooctonus from the Afrotropical Region and the first described species of Ooctonus native to the southern hemisphere. The only previously named Ooctonus from Africa (Madagascar), O. sevae Risbec, was transferred recently to Gonatocerus. A lectotype and paralectotypes are designated here for the slide-mounted and two card-mounted syntypes, respectively, of this species. One species in New Zealand, Ooctonus vulgatus Haliday, is an accidental introduction from the northern hemisphere. Online interactive keys to the South African species are available at: http://www.waspweb.org/Chalcidoidea/Mymaridae/Keys/index.htm

Cirrospilus flavoviridis Crawford, syn. nov., is synonymized under C. vittatus Walker. It is newly recorded as a solitary egg parasitoid from eggs of Neodiprion abietis Harris (Hymenoptera: Diprionidae) on balsam fir, Abies balsamea (L.) Mill. (Pinaceace), in New Brunswick and Newfoundland and from eggs of Neodiprion nanulus nanulus Schedl in Wisconsin.

The Mexican genera of Mymaridae (Hymenoptera: Chalcidoidea) are keyed in English and Spanish, and a catalogue of species occurring in Mexico is presented. Thirty-six genera, including 79 named species in 20 of the genera, are reported. These are mentioned in about 100 publications either as original species descriptions or as publications that specifically mention species and/or specimens from Mexico. In the catalogue, species distributions by state are given based on literature records, and collection data are compiled from about 3630 specimens examined in eight collections in Canada, Mexico and USA. Host are listed for specimens reared mainly in Mexico. A few extralimital host records are also given.

The monotypic genus Mymarilla Westwood is known only from St. Helena, a remote island in the South Atlantic Ocean. The peculiar species M. wollastoni Westwood (Mymaridae) is redescribed and illustrated from non-type material. Mymarilla is compared with Cremnomymar Ogloblin spp. from the Juan Fernández Islands in the South Pacific Ocean. Stephanodes Enock is shown to be the most likely sister genus to Mymarilla. Nesopolynema Ogloblin, syn. n., Oncomymar Ogloblin, syn. n., Scolopsopteron Ogloblin, syn.n., are placed in synonymy under Cremnomymar and their species transferred as Cremnomymar caudatum (Ogloblin 1952), comb. n., C. dipteron (Ogloblin 1957), comb. n., and C. kuscheli (Ogloblin 1952), comb. n. Wing shape and wing reductions in Mymaridae are discussed in relation to biogeography, particularly with respect island faunas and to four genera, Cremnomymar, Mymarilla, Parapolynema Fidalgo, and Richteria Girault, some or all of whose species have more or less convex fore wings.

A new genus and species, Stipecarinata striata (Hymenoptera: Eulophidae: Tetrastichinae), is described from Japan. Its relationship to other tetrastichine genera is discussed.

The five species ofDimmockiaAshmead are reviewed and keyed. Members are mainly hyperparasites of Hymenoptera and Diptera parasitic on Lepidoptera, though they are also recorded as primary parasites of Lepidoptera. The NearcticD.incongruaandD.pallipesare redescribed and a lectotype is designated forD.incongrua.Dimmockia marylandicaGirault is provisionally removed fromDimmockiabut its correct placement is unknown because the unique type is lost. The PalaearcticD.brevicornisis newly recorded from North America. Additional taxonomic features are provided forD.exorientisandD.secunda. Two African species, previously placed inDimmockia, are transferred toSympiesisasS.polygoniae(Risbec) comb.nov. andS.cosmopterygi(Risbec) comb.nov. A lectotype is designated forS.polygoniae. A character analysis ofDimmockiaspecies and 21 species ofSympiesisis provided and relationships are discussed.

Myanmymar aresconoides gen n., sp. n. is described from one female in Burmese amber, dated as about 100 my. It is similar to Arescon on wing features but is unique among Mymaridae indistinctly segmented palpi. It is the fifth mymarid genus definitely referable to the Cretaceous period. A key to Cretaceous mymarid genera is presented and the features of Myanmymar are compared with the other Cretaceous and extant mymarid genera.

Gonatocerus is a worldwide group with numerous described extant species classified in several subgenera (Triapitsyn et al. 2010). Its members are often the most commonly collected Mymaridae in almost any habitat so it seems surprising that it has been recorded only once as a fossil, in Baltic amber by Meunier (1905). The three species described below definitely belong to Gonatocerus based onthe entire clava, 8-segmented funicle, similar sized gastral segments, short and probably narrow petiole, and 5-segmented tarsi (at least in the one species where they can be counted). Because they all appear to have a rhomboidal dorsellum they would be classified either in Gonatocerus (Gonatocerus) or in Gonatocerus (Cosmocomoidea), but not Gonatocerus (Lymaenon), the most common extant subgenus because it has a narrow, strap-shaped dorsellum or Gonatocerus (Gastrogonatocerus) because the ovipositor does not project forward under the mesosoma.

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The genera of Mymaridae occurring in Australia are keyed and a diagnosis for each is given. Forty-five nominal genera are recognized, including three new ones: Kompsomymar Lin and Huber, gen. nov., with type species K. bicoloratum Lin and Huber, sp. nov., Cleruchoides Lin and Huber, gen. nov., with type species C. noackae Lin and Huber, sp. nov., and Parastethynium Lin and Huber, gen. nov., with type species Parastethynium maxwelli (Girault), comb. nov. from Stethynium. The Australian genera are placed in twelve informal groups. Three new generic synonymies are proposed: Haplochaeta, syn. nov. under Cleruchus, Idiocentrus, syn. nov. under Paranaphoidea, and Nesetaerus syn. nov. under Australomymar. Twenty-six new combinations, are proposed: Allanagrus aurum (Girault), A. gladius (Girault) and A. mayeri (Girault) from Stethynium; Arescon nigriceps (Girault) from Anthemus; Australomymar gressitti (Doutt) from Nesetaerus and A. incerta (Girault) from Polynemoidea; Ceratanaphes laplacei (Girault) and C. wallacei (Girault) from Erythmelus; Cleruchus schilleri (Girault) and C. tintoreti (Girault) from Erythmelus, and Cleruchus mandibularis (Noyes and Valentine) from Haplochaeta; Erythmelus emersoni (Girault) from Anthemus; Gonatocerus aureinotum (Dodd), G. bellus (Girault), G. centaurus (Girault), G. citriscapus (Girault), G. flavipes (Girault), G. gigas (Girault), G. ignipes (Girault), G. iona (Girault); G. mirus (Girault), and G. prometheus (Girault) from Ooctonus; Mimalaptus victoriae (Girault) from Dicopus; Paranaphoidea harveyi (Girault) from Erythmelus; Pseudanaphes lincolni (Girault) and P. particoxae (Girault) from Polynemoidea. The species occurring in Australia are listed for each genus and their type localities are given.

The 400+ nominal species of the worldwide genus Gonatocerus Nees are reclassified into 14 genera that are placed in Gonatocerini, which is defined by three putative autapomorphies. A key to the 13 extant genera of Gonatocerini is given, based on females. Five previously described genus-group taxa are recognized: Cosmocomoidea Howard stat. rev. (= ater group, of authors), Gahanopsis Ogloblin stat. rev. (= deficiens group, of authors), Gastrogonatocerus Ogloblin stat. n. (= membraciphagus group, of authors), Gonatocerus (= sulphuripes group, of authors), and Lymaenon Walker stat. rev. (= litoralis group, of authors). One new fossil genus, Archigonatocerus Huber gen. n., with two fossil species, A. balticus Huber sp. n., and A. longivena Huber sp. n. and one fossil species in Gonatocerus, G. janzeni Huber sp. n., are described, all from Baltic amber from the Eocene epoch. Eight new extant genera and 16 new extant species are described and their species keyed: Cosmocomopsis Huber gen. n., with C. flopsis Huber sp. n. and C. mopsis Huber sp. n.; Heptagonatocerus Huber gen. n., with H. madagascarensis Huber sp. n., H. magnificus Huber sp. n., H. parvus Huber sp. n., and H. pulchellus Huber sp. n.; Krateriske Huber gen. n., with K. ecuadorensis Huber sp. n., K. guianensis Huber sp. n., and K. peruensis Huber sp. n.; Octomicromeris Huber gen. n., with O. compacta Huber sp. n. and O. brevis Huber sp. n.; Pro-gonatocerus Huber gen. n., with P. albiclava Huber sp. n. and P. brunneiclava Huber sp. n; Tanyxiphium Huber gen. n., with T. breviovipositor Huber sp. n., T. longissimum Huber sp. n., and T. seychellense Huber sp. n. Yoshimotoana Huber gen. n. (= masneri group, of authors) with one included species and Zeyanus Huber, gen. n. (= asulcifrons group, of authors) with 9 included species. Keys to the species of seven genera: Archigonatocerus, Cosmocomopsis, Heptagonatocerus, Krateriske, Octomicromeris, Progonatocerus, and Tanyxiphium are provided. Information for each nominal species catalogued includes the original reference, kind, sex and depository of primary type, and subsequent references that include relevant previous generic combinations, if applicable. The type locality is given, based on original descriptions or, where necessary, subsequent publications that provide clarification on the collection locality. Two new synonyms are proposed: Gonatocerus similis Gupta & Poorani, 2008, syn. n. under G. bialbifuniculatus Subba Rao, 1989; and Gonatocerus hispaniolus Triapitsyn & Huber, 2010, syn. n. under G. masneri Yoshimoto, 1990. Among the species, 245 new combinations are proposed: 82 in Cosmocomoidea, 1 in Cosmocomopsis, 4 in Gahanopsis, 8 in Gastrogonatocerus, 3 in Gonatocerus, 135 in Lymaenon, 2 in Tanyxiphium, 1 in Yoshimotoana, and 9 in Zeyanus. Revived combinations are proposed for Twelve species: 1 in Cosmocomoidea, 1 in Gahanopsis, 2 in Gonatocerus, and 8 in Lymaenon. The 410 nominal species group names are catalogued under their currently accepted genus and also listed alphabetically in an appendix. A tentative generic phylogeny is proposed.

The Mexican species of Erythmelus Enock (Hymenoptera: Mymaridae) are revised. A key to females of 13 species is provided in both English and Spanish. Two new taxa are described— E. maya Guzman-Larralde & Triapitsyn, sp. n. and E. tigres Guzman-Larralde & Triapitsyn, sp. n. Six species are newly recorded from Mexico— E. angustatus Ogloblin, E. cingulatus Ogloblin, E. clavatus Ogloblin , E. gracilis (Howard), E. nanus Dozier, and E. noeli (Dozier), besides new geographic records for E. miridiphagus Dozier, E. picinus (Girault), E. psallidis Gahan, and E. rex (Girault) which were previously known from the country.

A new fossil species of fairyfly (Hymenoptera: Chalcidoidea: Mymaridae) is described and figured from a well-preserved female in middle Eocene (Lutetian) Baltic amber as Borneomymar pankowskiorum Engel, McKellar, & Huber, new species. This species represents the fourth genus from Baltic amber whose extant species now occur only in southeastern Asia, Australia and Madagascar.

A new genus and species of Rotoitidae, Chiloe micropteron Gibson and Huber, is described from females and one male from Chile. The taxon is the second known genus and species, and the male is the only one known for the family. Scanning electron micrographs illustrate external and internal structure of C. micropteron females, and external structure of Rotoita basalis

Two new taxa, Gonatocerus (Lymaenon) bulgaricus Donev & Triapitsyn (Bulgaria, and also apparently mainland Greece) and G. (Lymaenon) mediterraneus Donev & Triapitsyn (Greece-Crete Island) are described, diagnosed, and illustrated. Also, a species tentatively identified as G (Lymaenon) ?beshbarmak Triapitsyn is reported from mainland Greece. If the species is indeed G. beshbarmak then this is the first record of it from Greece.

Both sexes of Parastethynium maxwelli (Girault), a parasitoid of Zophiuma lobulata Ghauri eggs on coconut and oil palm in Papua New Guinea, are described and illustrated. The second known species in the genus Parastethynium, P. hirsutum Huber sp. n., from Indonesia (Sulawesi) is also described. The latter represents the first record from the Oriental region. The basic biology of P. maxwelli is presented. Mean progeny produced per female was 57 with a female proportion of 0.59. Mean egg to adult development time was 11 days, at 24.5 o C−29.7 o C and 72−93% relative humidity. Survival time of females and males fed on honey and water was longer compared to males and differed significantly with those provided with water only or nothing at all.

Krokella gen. n. (Hymenoptera: Mymaridae), is described with two species, K. fera sp. n. from southern Florida and tropical America, and K. bella sp. n. from Costa Rica. Its relationship to other mymarid genera is discussed.

Stethynium Enock, a mainly old world genus most of whose members occur in Australia, is redescribed based on study of the non-Australian species. The subgenus Neostethynium Ogloblin is removed from Stethynium and given generic status. The names S. faunum Girault and S. empoascae Subba Rao are synonymized under S. triclavatum Enock. A lectotype is designated for S. triclavatum. Stethynium angustipennesp. n. is described.Schizophragma Ogloblin, formerly a subgenus of Patasson, is redescribed as a genus. Anaphes bicolor Dozier and Stethynium annulatum Doutt are transferred to Schizophragma. The names S. annulatum and S. nana Ogloblin are synonymized, respectively, under S. bicolor and S. parvula Ogloblin. Lectotypes are designated for S. bicolor (Dozier) and S. latipennis (Crawford). A provisional key to the species of Schizophragma is presented.

Anaphes iole Girault is redescribed from specimens reared from Lygus hesperus Knight and Pseudatomoscelis seriatus (Reuter). Anaphes anomocerus, A. ovijentatus, and A. perdubius are synonyms of A. iole. Host-induced morphological variation is discussed. The main attributes that vary with host are the relative size of certain funicular articles and their complement of sensory ridges. There is no morphological overlap between populations as indicated by measurements of most other structures. However, certain structural features that can be used to define the species unequivocally were found.