Orphnebius (Deroleptus) septemcuspis, 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 : 69-70

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



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scientific name

Orphnebius (Deroleptus) septemcuspis

sp. nov.

Orphnebius (Deroleptus) septemcuspis View in CoL spec. nov.

( Figs 60 View Figs 54–83 , 87, 95–96 View Figs 84–101 , 335–339 View Figs 317–339 )

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. / Collection Naturhistorisches Museum Basel / Holotypus ♂ Orphnebius septemcuspis sp. n., det. V. Assing 2015” ( NHMB). GoogleMaps

Etymology: The specific epithet (Latin, adjective: with seven apices) alludes to the conspicuous shape of the posterior margin of the abdominal tergite VIII.

Description: Body length 5.0 mm; length of forebody 2.1 mm. Coloration: body black, with the abdominal segments III–V reddish; legs blackish, with the narrow base of the mesofemora and the basal third of the metafemora yellow and with the tarsi reddish; antennae black; maxillary palpi blackish with the terminal palpomere yellow.

Head ( Fig. 87 View Figs 84–101 ) 1.18 times as broad as long; posterior angles practically obsolete; punctation extremely fine and sparse; median dorsal portion impunctate; interstices without microsculpture. Eyes large, longer than distance from posterior margin of eye to posterior constriction of head. Antenna ( Fig. 60 View Figs 54–83 ) slender, 2.05 mm long, and of distinctive morphology; antennomere I conspicuously club-shaped, apically distinctly dilated; antennomeres III–V distinctly flattened, IV–VI distinctly oblong, VII–IX weakly oblong, X approximately as long as broad, and XI distinctly longer than the combined length of IX and X.

Pronotum ( Fig. 87 View Figs 84–101 ) 1.12 times as broad as long and approximately as broad as head, strongly convex in crosssection; lateral margins parallel and straight in dorsal view; disc with few scattered macropunctures, otherwise impunctate, near antero-lateral angles with a long black seta.

Elytra ( Fig. 87 View Figs 84–101 ) approximately as long as pronotum; punctation moderately sparse and coarsely granulose. Hind wings present. Legs long and slender; metatibia 1.2 mm long; metatarsus 0.9 times as long as metatibia; metatarsomere I longer than the combined length of II and III.

Abdomen ( Figs 95–96 View Figs 84–101 ): sternite III with a long and apically acute postero-lateral process; tergite III impunctate; tergites IV–V with several setiferous punctures at posterior margin, otherwise impunctate; tergite VI with a long lateral keel and a lateral setiferous puncture on either side, and with several punctures at posterior margin, between these punctures with some microstriae; tergite VII, except for anterior margin, with coarse and very dense non-setiferous punctation, near posterior margin with a transverse row of oblong setiferous tubercles, posterior margin with palisade fringe; tergite VIII ( Fig. 338 View Figs 317–339 ) of very distinctive shape, with seven pronounced teeth at posterior margin (a long median, two long lateral, four shorter sublateral teeth) and two additional tooth-like processes in posterior portion of lateral margin on either side; sternite VIII ( Fig. 339 View Figs 317–339 ), too, of distinctive shape, posterior margin convex, sublaterally with a short comb of three stout setiferous tooth-shaped processes on either side.

♂: median lobe of aedeagus ( Figs 335–336 View Figs 317–339 ) 0.47 mm long and of simple shape; ventral process straight in lateral view and apically convex in ventral view; paramere ( Fig. 337 View Figs 317–339 ) 0.42 mm long, with a moderately long apical lobe.

Comparative notes: Among other geographically close Deroleptus species , O. septemcuspis is characterized by numerous distinctive characters, particularly the coloration, the morphology of the antennae (especially the conspicuously club-shaped antennomere I), coarsely granulose punctation of the elytra, an abdominal tergite VII with extensively non-setiferous punctation and with additional setiferous tubercles, a tergite and sternite VIII of very distinctive shapes, and by the morphology of the aedeagus.

Distribution and natural history: The type locality is situated near Oudom Xai in North Laos. The holotype was collected at an altitude of approximately 1100 m, together with O. extensus , O. serratus , and O. integer .


Switzerland, Basel, Naturhistorisches Museum


Natural History Museum Bucharest













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