On Zyras sensu strictu in the East Palaearctic and Oriental regions, with a focus on the faunas of the Himalaya, India, Sri Lanka, Thailand, and Sulawesi (Coleoptera: Staphylinidae: Aleocharinae: Lomechusini) Author Assing, Volker text Beiträge Zur Entomologie = Contributions to Entomology 2017 2017-06-30 67 1 117 192 journal article 2472 10.21248/contrib.entomol.67.1.117-192 39f2d8c0-d0e4-46ea-8d5d-63e668fe9e43 0005-805X 5742363 FD33C1AE-F7D9-4E3A-A053-A2CAA7261CFE Zyras ( Zyras ) parvicollis spec. nov. urn:lsid:zoobank.org:act: 317676A6-1E6A-495F-9864-B7DFA85717F4 ( Figs 33 , 69 , 104 , 206–211 , Map 10 ) Type material : Holotype ♂ : “W. THAILAND : 300 m ., Thung Yai Wildlife Sanctuary . 15°28'N – 98°48'E . / Tak Province , Umphang District , Song Bae Stream . 18–27.iv. 1988 . / Evergreen rain forest. M.J.D. Brendell. B.M. 1988- 183 / Holotypus ♂ Zyras parvicollis sp. n. det. V. Assing 2016” ( BMNH ) . Paratypes : 3 ♂♂: same data as holotype ( BMNH , cAss) . Etymology : The specific epithet (adjective) alludes to the relatively small and weakly transverse pronotum. Description : Size highly variable: body length 5.8–6.8 mm ; length of forebody 2.5–3.0 mm. Coloration ( Figs 33 , 69 , 104 ): head and pronotum black; elytra dark-yellowish with the postero-lateral portion more or less extensively and rather sharply blackish; abdomen with tergites III–V dark-brown to blackish-brown with the posterior margins and the paratergites more or less extensively dark-reddish, tergite VI blackish-brown to black with the posterior margin and the paratergites dark-reddish, tergites VII–VIII and segments IX–X blackish-brown to black; legs pale-yellowish; antennae blackish with antennomeres I–II yellowish-brown to brown and the apex of antennomere XI dark-reddish; maxillary palpi reddish-brown to dark-brown, with the terminal palpomere yellowish to reddish. Head ( Fig. 69 ) distinctly transverse, broadly impunctate along middle, in lateral portions with sparse and moderately coarse punctation. Eyes large and bulging, much longer than postocular region in dorsal view. Antenna ( Fig. 33 ) slender, 2.1–2.3 mm long; antennomeres IV–V weakly oblong, VI approximately as long as broad; VII approximately as long as broad or weakly transverse; VIII–X weakly transverse, X approximately 1.5 times as broad as long, and XI distinctly elongate, approximately as long as the combined length of VIII–X. Pronotum ( Fig. 69 ) relatively small (in relation to head), approximately 1.2 times as broad as long and 1.10–1.18 times as broad as head, broadest near anterior angles; lateral margins straight or weakly convex in posterior two-thirds (dorsal view), strongly converging posteriad; surface smooth, without impressions; punctation coarse, moderately sparse, and moderately irregularly distributed; median line narrowly impunctate or anteriorly with scattered punctures. Elytra ( Fig. 69 ) 0.88–0.95 times as long as pronotum; punctation coarse and dense, somewhat sparser in posterior fourth. Hind wings fully developed. Metatarsomere I slightly shorter than the combined length of II–IV. Abdomen ( Fig. 104 ) slightly narrower than elytra, with moderately deep anterior impressions on tergites III–V; anterior impressions of tergites III–V each with a row or with a transverse band of coarse non-setiferous punctures; tergite III with a lateral setiferous puncture on either side and with four setiferous punctures at posterior margin (median pair somewhat separated from margin); tergites IV and V with a lateral setiferous puncture on either side and with six setiferous punctures at posterior margin; tergite VI with a narrow transverse row of non-setiferous punctures at anterior margin, with a lateral setiferous puncture on either side, and with six setiferous punctures at or near posterior margin; tergite VII with a transverse band of non-setiferous punctures anteriorly, and with two transverse rows of setiferous punctures posteriorly, posterior margin with palisade fringe; tergite VIII with sparse long and black setae in posterior portion. ♂: posterior margin of tergite VIII ( Fig. 206 ) with a median pair of blunt teeth; sternite VIII ( Fig. 207 ) weakly transverse, posterior margin convex; median lobe of aedeagus 0.80–0.85 mm long and shaped as in Figs 208–211 ; paramere approximately 0.9 mm long and with moderately long apical lobe. Comparative notes : Zyras parvicollis is distinguished from the similarly coloured Z. proximus by a pronotum without impressions and with less irregular punctation, by the presence of only two blunt teeth at the posterior margin of the male tergite VIII, by a transverse male sternite VIII, by the shape of the ventral process of the aedeagus, and by a shorter apical lobe of the paramere. From other sympatric species of similar habitus and punctation ( Z. novinversus , Z. brevilobatus ), it is readily separated by the different coloration of the abdomen alone. Distribution and natural history : The type locality is situated in West Thailand ( Map 10 ). The specimens were collected in an evergreen rain forest at an altitude of 300 m , most likely with flight (Malaise?) traps, together with Z. proximus , Z. novinversus , Z. bettotanus , and Z. brevilobatus .