On some Lomechusini of the Palaearctic and Oriental regions (Coleoptera: Staphylinidae: Aleocharinae) Author Assing, Volker text Beiträge Zur Entomologie = Contributions to Entomology 2016 2016-12-20 66 1 13 111 https://www.contributions-to-entomology.org/article/view/1904 journal article 2419 10.21248/contrib.entomol.66.1.13-111 d2933fad-1cac-4a5a-a558-2633f8314541 0005-805X 6421171 Orphnebius cernens spec. nov. ( Figs 2, 24 , 202–206 ) Type material : Holotype ♂ : “ Lao-NE , Hua Phan prov. , 20°12'N 104°01'E , Phu Phan Mt. , ~ 1750 m , 17.v.–3.vi. 2008 , Vít Kubáň leg. / Holotypus ♂ Orphnebius cernens sp. n. , det. V. Assing 2015” ( NHMB ). Paratypes : 5 ♂♂ , 1 ♀ , 3 sex?: same data as holotype ( NHMB , cAss) . Etymology : The specific epithet is the present participle of the Latin verb cernere (to see) and alludes to the large eyes. Description : Body length 3.6–4.2 mm ; length of forebody 1.5–1.7 mm . Coloration: head black; pronotum and elytra blackish-brown to black; abdomen pale-reddish; legs with reddish to dark-brown femora and reddish tibiae and tarsi; antennae with antennomeres I–IV reddish and V–XI dark-brown to blackish-brown, V and X rarely paler; maxillary palpi brown to dark-brown with yellowish terminal palpomere. Head ( Fig. 24 ) transverse, 1.3 times as broad as long; posterior angles completely obsolete; posterior margin of disc convex; punctation fine and sparse; median dorsal portion extensively impunctate; interstices without microsculpture. Eyes very large, reaching posterior margin of head. Antenna ( Fig. 2 ) approximately 1.1 mm long, moderately incrassate, and moderately asymmetric; antennomere IV small and weakly transverse; antennomeres V–X asymmetric, of gradually increasing width, and increasingly transverse; X nearly twice as broad as long; XI strongly elongate, slightly longer than the combined length of VIII–X. Pronotum ( Fig. 24 ) moderately transverse, 1.25– 1.30 times as broad as long and 1.10–1.15 times as broad as head, moderately convex in cross-section; posterior angles weakly marked; disc with a median pair of punctures, otherwise nearly impunctate; margins with additional punctures; lateral margins each with three long, stout, and erect black setae. Elytra ( Fig. 24 ) approximately 0.85 times as long as pronotum; suture distinctly gaping posteriorly; punctation moderately sparse and fine; pubescence pale, fine, long, and sub-erect or depressed on disc. Hind wings fully developed. Metatarsomere I approximately as long as the combined length of II and III. Abdomen: tergites III–VI with a lateral setiferous puncture on either side and with four setiferous punctures at posterior margin (individual punctures may be missing); tergite VII with oblong non-setiferous punctation across median portion, anterior and posterior portions without such punctation, with a transverse row of setiferous punctures near posterior margin, posterior margin with palisade fringe; tergite VIII with a marginal and a submarginal row of long setae, posterior margin broadly convex; sternite VIII with broadly convex posterior margin. ♂ : hemi-tergites IX and tergite X with extremely dense and long pubescence ( O. hauseri type ); median lobe of aedeagus ( Figs 202–203 ) approximately 0.65 mm long; ventral process straight in lateral view and of subtriangular shape in ventral view; internal sac with large and strongly sclerotized structures; paramere ( Figs 204–205 ) approximately 0.6 mm long, condylite distinctly shorter than paramerite, stout, curved, and with very short velum. ♀ : spermatheca ( Fig. 206 ) of similar shape as in other species of the O. hauseri subgroup. Comparative notes : Among the species of the O. hauseri subgroup, O. cernens is most similar to O. dishamatus ASSING, 2015 ( China : Yunnan ) both in external and in sexual characters. It is distinguished from that species by larger and more bulging eyes, a distinctly longer antennomere XI with parallel margins ( O. dishamatus : with weakly convex margins), and by the morphology of the aedeagus ( O. dishamatus : ventral process slightly shorter and with a less distinctly marked apex in ventral view; condylite of paramere straight). For illustrations of O. dishamatus see ASSING (2015e) . Distribution and natural history : The type locality is situated in Hua Phan province , North Laos , at an altitude of approximately 1750 m . Orphnebius lunatus , O. fuscapicalis , O. fusicollis , O. spoliatus , and an unnamed species were collected in the same locality.