Zyras Stephens 1835
Creators: name: Hlavac, Peter
name: Jaszay, Tomas
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Zyras

description: Genus <i>Zyras</i> Stephens, 1835 <i>Zyras</i> Stephens, 1835: 430. Type species: <i>Zyras haworthi</i> (Stephens), established by decision of the International Commission on Zoological Nomenclature (ICZN 1961, Opinion 599) <i>Zyras</i> Stephens: Cameron, 1939: 497 (key to subgenera and species of India, Myanmar and Sri Lanka); Kistner 1972: 143 (redescription); Scheerpeltz 1974: 39 (key to African subgenera); Seevers 1978: 153 (key to Nearctic species); Dvo&amp;rcaron;ák 1980 (key to species of Czech and Slovak Republic, including <i>Pella, Lepla, Pellochromonia, Zyras, Myrmoecia</i>); Dvo&amp;rcaron;ák 1984: 200 (key to Palaearctic species including China); Hastir and Gaspar 2001 (biology); Klimaszewski et al. 2005: 714 (restricted redefinition, key to species of America north of Mexico). <b>Diagnosis.</b> <i>Zyras</i> (<i>Zyras</i>) can be distinguished from the other genera of Lomechusini by a combination of the following characters: 1) whole body shiny, unicoloured or often with different colouration for head, pronotum, elytra and abdomen, sometimes covered with long setae; 2) all antennomeres petiolate, antennomere III about as long as pedicel; 3) neck absent; 4) pronotum usually with well-defined median antebasal fovea; 5) abdomen simple, not physogastric, parallel-sided; 6) simplified aedeagus, median lobe with enlarged basal capsule and narrowly conical apical lobe; 7) spermatheca sclerotized, very small with narrowly elongate capsule and with extremely long and highly coiled spermathecal duct. <b>Description.</b> <i>Body</i> (Fig. 1) slender, subparallel-sided. Body length highly variable, ranging from 3–9 mm, whole body always shiny, unicoloured, or often with different colouration for head, pronotum, elytra and abdomen. <i>Head</i> (Figs 2, 3) slightly wider than long, posterior margin slightly covered by anterior edge of pronotum, neck absent; temples long, round, about as long as diameter of eyes or longer; occipital suture present, not visible dorsally, ventrally reaching hypostoma, hypostoma narrow; surface with erect or appressed setae. Gula long, evenly divergent from anterior to posterior; submentum fused to gula, broadly expanded anteriorly. Eyes large, oval in lateral view, prominent. <i>Antennae</i> (Fig. 4) with all antennomeres petiolate, antennomere III about as long as II, when bent backwards slightly exceeding base of pronotum. <i>Labrum</i> (Fig. 5) much wider than long, with shallow median excavation; surface covered with numerous pseudopores and about ten real pores, except on posterior and lateral areas; antero-lateral areas each with 4–6 macrosetae of different length. <i>Mandibles</i> (Figs 6–9) almost symmetrical, lacking teeth, with 3–4 small setae present dorsally, mesal areas of dorsal and ventral surfaces covered with numerous pseudopores, prostheca with inner margin pubescent. <i>Maxilla</i> (Fig. 10) is generalized in shape like for other Lomechusini, with elongate galea and shortened lacinia, palpomere I minuscule, palpomere II slightly curved and gently short- er that palpomere III, terminal palpomere about three times as short as III, pointed apically. <b>Figure I.</b> <i>Zyras (Zyras) haworthi</i> (Stephens), dorsal view (approximative length of photograped specimen is 7.1 mm) <i>Mentum</i> (Fig. 11) trapeziform, posterior and anterior margins truncate, with setae, surface covered with pseudopores bearing minute setae, and about 6–8 pores with longer setae present on antero-lateral areas. <i>Labium</i> (Fig. 12) with prementum with two real pores and one setal pore mesolaterally, with about 30–40 pseudopores behind medial setae, apodeme with large, truncate process, lateral lobes of apodeme gently curved, assimetrical, bifurcate apicaly. Ligula bilobed, each lobe long, pointed apically, with fine apical seta. Labial palpus with first segment long, more than twice as long as second and clearly thicker, third segment slightly longer than second and about twice as slender as second. <i>Pronotum</i> slightly wider than long (Fig. 1), anterior margin straight, posterior margin evenly rounded, posterior corners small but well-defined, smooth or entirely or
description: Published as part of <i>Hlavac, Peter &amp; Jaszay, Tomas, 2009, A revision of the genus Zyras (Zyras) Stephens, 1835 (Coleoptera, Staphylinidae, Aleocharinae). I. Current classification status and the redefinition of the genus, pp. 49-71 in ZooKeys 29 (29)</i> on pages 52-53, DOI: 10.3897/zookeys.29.218, http://zenodo.org/record/576574
description: {"references": ["Stephens JF (1835) Illustrations of British entomology, or a synopsis of indigenous insects, containing their generic and specific distinctions, with an account of their metamorphoses, times of appearance, localities, food, and economy, as far as practicable. Mandibulata, Vol. 5. Baldwin &amp; Cradock, London. pp. 369 - 477.", "Kistner DH (1972) Studies of Japanese myrmecophiles. Part I: The genera Pella and Falagria (Coleoptera, Staphylinidae). In: Entomological Essays to Commemorate the Retirement of Professor K. Yasumatsu, Hokurynken, Tokio 141 - 165.", "Scheerpeltz O (1974) Coleoptera aus Nordostafrika, Staphylinidae. Acta Entomologica Fennica 31: 1 - 49.", "Seevers CH (1978) A generic and tribal revision of the North American Aleocharinae (Coleoptera: Staphylinidae). Fieldiana: Zoology 71: 275 pp.", "Dvorak M (1980) Ceskoslovenske druhy rodu Zyras Stephens (Col. Staphylinidae). Entomologicke Problemy 16: 93 - 98.", "Dvorak M (1984) Zur Kenntnis einiger myrmekophiler Staphylinidae Coleoptera). Acta Entomologica Bohemoslovaca 81: 190 - 203.", "Hastir P, Gaspar Ch (2001) La myrmecophilie chez les Staphylinidae: la cohabitation de Zyras haworthi Stephens et de Formica sanguinea Latreille. Notes faunistiques de Gembloux, 43: 17 - 26.", "Klimaszewski J, Pelletier G, Maruyama M, Hlavac P (2005) Canadian species of the Zyras group of genera and review of the types from America north of Mexico. Revue Suisse de Zoologie 112 (3): 703 - 733."]}