Orphnebius fortesetosus, Assing, 2019

Assing, Volker, 2019, On the Lomechusini fauna of the Palaearctic and Oriental regions. XXVI. New species, a new synonymy, and additional records (Coleoptera: Staphylinidae: Aleocharinae), Beiträge Zur Entomologie = Contributions to Entomology 69 (1), pp. 33-70 : 47-48

Orphnebius fortesetosus spec. nov.

urn:lsid:zoobank.org:act:CEE40705-FCE7-47A3-859A-614E2D7ADCAC

( Figs 6–7 , 31, 87–90)

Type material: Holotype: “ CHINA N Sichuan, Xiao-Zhaizi National Nature Reserve, 7 km W of Qingpianxiang, 1560–1700 m, Xiaozhaizi , 27.6.– 1.7.2017, FIT, 32°1'25"N 103°56'21"E, lgt. P. Kabátek, O. Konvička, P. Viktora / Holotypus Orphnebius fortesetosus sp. n., det. V. Assing 2017” ( SCS). 28: same data as holotype ( MMB, cAss).

Etymology: The specific epithet is an adjective composed of the Latin adjectives fortis (strong) and setosus (with setae). It alludes to the stout setae on the paramere.

Description: Body length 3.5–4.3 mm; length of forebody 1.4–1.6 mm. Coloration ( Figs 6–7 ): forebody blackish with the humeral portions of the elytra more or less distinctly and more or less extensively yellowish; abdomen reddish, sometimes with the median portions of tergites V–VII slightly and diffusely darker; legs red, usually with the mesofemora somewhat darker; antennae (Fig. 31) with antennomeres I–IV yellowish-red, V palereddish to reddish-brown, and VI–XI black; maxillary palpi yellowish-red.

Head ( Fig. 6 ) approximately 1.3 times as broad as long, posterior angles completely obsolete; punctation extremely fine, barely visible, and very sparse; median dorsal portion impunctate; interstices without microsculpture. Eyes very large, longer than distance from posterior margin of eye to posterior constriction of head. Antenna (Fig. 31) approximately 1.0 mm long, moderately incrassate, and weakly asymmetric; antennomeres IV–X somewhat flattened or oval in cross-section; antennomere IV small and moderately transverse; antennomere V distinctly larger than IV and more distinctly transverse; antennomeres VI–X of gradually increasing width and increasingly transverse; X more than twice as broad as long; XI elongate, approximately as long as the combined length of VII–X.

Pronotum ( Fig. 6 ) 1.30–1.35 times as broad as long and 1.25–1.30 times as broad as head, moderately convex in cross-section; posterior angles practically obsolete; disc impunctate; lateral margins each with five long and stout black setae, anterior margin with an additional long seta on either side.

Elytra ( Fig. 6 ) approximately 0.8–0.9 times as long as pronotum; suture distinctly gaping posteriorly; punctation sparse and fine. Hind wings fully developed. Metatarsomere I approximately as long as the combined length of II and III.

Abdomen ( Fig. 7 ) broad, gradually tapering from base towards apex; tergites III–VI with fine setiferous punctures at posterior margins and with a long dark seta in postero-lateral portions, otherwise practically impunctate; tergite VII with dense and somewhat oblong non-setiferous punctures in posterior 3/5, posterior margin with distinct palisade fringe; tergite VIII with a marginal and a submarginal row of long setae, posterior margin broadly convex.

: hemi-tergites IX and tergite X with dense and long pubescence; median lobe of aedeagus ( Figs 87–88 ) 0.75–0.80 mm long; ventral process relatively short and of subtriangular shape in ventral view; paramere ( Figs 89–90 ) 0.5 mm long, paramerite with four stout setae subapically; condylite stout and slightly shorter than paramerite.

: unknown.

Comparative notes: As can be inferred from external and particularly the male primary and sexual characters, O. fortesetosus belongs to the O. hauseri subgroup of the O. hauseri group. For an overview of the species currently assigned to this group see ASSING (2017a). The species is distinguished from other representatives of this subgroup recorded from China particularly by the coloration of the elytra (all other Chinese species of the O. hauseri subgroup have the elytra uniformly blackish) and by the morphology of the aedeagus, in particular the four stout subapical setae of the paramere.

Distribution and natural history: The type locality is situated in Xiao-Zhaizi National Nature Reserve ( China: North Sichuan). The specimes were collected with a flight interception trap at an altitude of 1560–1700 m. Remarkably, all 29 specimens are males.

Figures

Figs 1–15:Myrmoecia urartu (1), Pella feldmanni (2), Orphnebius taurus (3–5), O. fortesetosus (6–7), O. morulus (8–9), O. globifer (10–11), andO. elevatus (12–15): habitus (1–3); head and pronotum (4–5); forebody (6, 8, 10, 12–13); abdomen (7, 9, 11); anterolateral portion of abdomen (14); tergites VII–VIII (15). Scale bars: 1–3: 1.0 mm; 4–15: 0.5 mm.

Figs 79–95: Myrmoecia urartu (79), Pella feldmanni (80–83), Orphnebius cachemiricus (84–86), O. fortesetosus (87–90), and O. taurus(91–95): spermatheca (79); median lobe of aedeagus in lateral and in ventral view (80–81, 84–85, 87–88, 92–93); male tergite VIII (82, 91); male sternite VIII (83); paramere (86, 89, 95); apical portion of paramere (90); apical portion of median lobe of aedeagus (94). Scale bars: 79–93, 95: 0.2 mm; 94: 0.1 mm.