Orphnebius integer, Assing, 2016

Assing, Volker, 2016, On some Lomechusini of the Palaearctic and Oriental regions (Coleoptera: Staphylinidae: Aleocharinae), Beiträge Zur Entomologie = Contributions to Entomology 66 (1), pp. 13-111 : 54

publication ID

https://doi.org/ 10.21248/contrib.entomol.66.1.13-111



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scientific name

Orphnebius integer

sp. nov.

Orphnebius integer View in CoL spec. nov.

( Figs 8 View Figs 1–26 , 33, 37 View Figs 27–39 , 244–250 View Figs 236–257 )

Type material: Holotype ♂: “ Laos-N ( Oudomxai ), 1–9.v.2002, ~ 1100 m, 20°45'N 102°09'E, Oudom Xai (17 km NEE), Vít Kubáň leg. / Holotypus ♂ Orphnebius integer sp. n., det. V. Assing 2015” ( NHMB). GoogleMaps

Paratype ♂: “ Laos, Louangnamtha pr., 21°09'N 101°19'E, Namtha → Muang Sing , 5–31.v.1997, 900– 1200 m, Vít Kubáň leg.” (cAss) GoogleMaps .

Etymology: The specific epithet (Latin, adjective: whole, undamaged) alludes to the apically undivided ventral process of the aedeagus.

Description: Body length 4.2–4.6 mm; length of forebody 1.7–1.9 mm. Coloration: forebody black; abdomen red; legs with blackish-brown femora, dark-brown tibiae, and reddish tarsi; antennae blackish with antennomeres II–IV at least partly dark-reddish; maxillary palpi brown to dark-brown with the apical palpomere yellowish.

Head ( Fig. 33 View Figs 27–39 ) of transversely rectangular shape, 1.45–1.48 times as broad as long (length measured from sclerotized portion of clypeus); posterior angles moderately marked; posterior margin truncate; clypeus extensively membranous; dorsal surface nearly impunctate. Eyes large, more than twice as long as postocular region in dorsal view. Antenna ( Fig. 8 View Figs 1–26 ) approximately 1.0 mm long; antennomere I very short, barely as long as the combined length of antennomeres II and III; antennomere IV weakly transverse and flattened; antennomere V much broader than antennomere IV; antennomeres V–X distinctly asymmetric, moderately flattened, and strongly transverse, more than twice as broad as long, and gradually increasing in width; XI nearly as long as the combined length of VIII–X.

Pronotum ( Fig. 33 View Figs 27–39 ) 1.33–1.42 times as broad as long and 1.07–1.13 times as broad as head, moderately convex in cross-section; lateral and posterior margins together nearly forming a semi-circle, posterior angles completely obsolete; disc with a median pair of punctures, otherwise practically impunctate; lateral margins with three long, erect, stout black setae.

Elytra ( Fig. 33 View Figs 27–39 ) approximately 0.75 times as long as pronotum; punctation sparse and fine; pubescence long, fine, pale, and sub-erect. Hind wings fully developed. Mesotibia moderately, smoothly dilated. Metatarsomere I slightly shorter than the combined length of II and III.

Abdomen ( Fig. 37 View Figs 27–39 ): tergites III–VI with a lateral setiferous puncture on either side, VI with four additional punctures at posterior margin; tergite VII with dense nonsetiferous punctures in posterior two-thirds, posterior margin with palisade fringe; tergite VIII ( Figs 249–250 View Figs 236–257 ) with a postero-median pair of long black setae, with three lateral long black setae in posterior portion, and with a lateral cluster of fine setae on either side, posterior margin convex and with eight short teeth; sternite VIII with broadly convex posterior margin.

♂: segments IX–X distinctly modified ( O. hauseri type), with dense and long pubescence; median lobe of aedeagus ( Figs 244–245 View Figs 236–257 ) approximately 0.75 mm long; ventral process short, undivided, and apically acute ( Fig. 246 View Figs 236–257 ); paramere ( Figs 247–248 View Figs 236–257 ) approximately 0.6 mm long, with slender condylite.

♀: unknown.

Comparative notes: Orphnebius integer is distinguished from other species of the O. serratus subgroup by the moderately dilated mesotibiae and by the distinctive shapes of the median lobe and the parameres of the aedeagus.

Distribution and natural history: The type specimens were collected in two localities in Oudomxai and Louangnamtha provinces, North Laos, at altitudes between 900 and 1200 m, in the type locality together with O. extensus , O. serratus , and O. septemcuspis .


Switzerland, Basel, Naturhistorisches Museum


Natural History Museum Bucharest













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