Rabdotodrusilla pectinata Assing 2016, spec. nov.
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Rabdotodrusilla
Rabdotodrusilla pectinata

description: Rabdotodrusilla pectinata spec. nov.
(Figs 123–125, 380–383)
Type material: Holotype ♂: “ Thailand – Chiang Mai, Doi Suthep 1120 m. Barber F. I.86, P. Schwendinger / Holotypus ♂ Rabdotodrusilla pectinata sp. n., det. V. Assing 2015” (MHNG).
Paratype ♂ [damaged]: same data as holotype (cAss).
Etymology: The specific epithet is an adjective derived from the Latin noun pecten (comb) and alludes to the shape of the posterior margin of tergite VIII.
Description: Body length 4.2 mm; length of forebody 1.8 mm. Coloration: head and pronotum dark-brown; elytra pale-brown with the postero-lateral portions extensively dark-brown; abdomen pale reddish-brown with segment VI infuscate; legs yellowish, with the tibiae infuscate; antennae brown with antennomeres I–II and the apex of XI paler; maxillary palpi yellowish-red with yellowish palpomere IV.
Head (Fig. 123) transverse, approximately 1.17 times as broad as long; punctation rather sparse and fine; pubesence long, pale, and depressed to sub-erect. Eyes large, longer than distance from posterior margin of eye to posterior constriction of head. Antenna (Fig. 124) rather massive, 1.5 mm long; antennomere I stout, barely twice as long as broad; II short, distinctly less than twice as long as broad; III nearly twice as long as II and more than twice as long as broad; IV very weakly transverse; V–X gradually increasing in width and increasingly transverse; IX–X more than 1.5 times as broad as long; XI nearly as long as the combined length of VIII–X.
Pronotum (Fig. 123) approximately 1.07 times as broad as long and 1.1 times as broad as head; posterior margin obtusely produced in the middle; disc matt and with dense, long, and straight longitudinal striae in posterior three-fourths, anteriorly and in antero-lateral portions more glossy and with granulose punctation.
Elytra (Fig. 123) approximately 0.8 times as long as pronotum; punctation very fine and dense. Hind wings present. Metatarsomere I approximately as long as the combined length of II–III.
Abdomen (Fig. 125) narrower than elytra; tergites III– VII each with a row of setiferous punctures at posterior margin, otherwise nearly impunctate, without microsculpture; posterior margin with palisade fringe.
♂: tergite VIII (Fig. 382) transverse, posterior margin with a pronounced lateral tooth-like projection on either side, between these projections with 15 conspicuous spine-shaped processes (somewhat resembling a comb); sternite VIII (Fig. 383) transverse and with weakly convex posterior margin; median lobe of aedeagus (Figs 380–381) approximately 0.55 mm long, with internal structures of distinctive shapes.
♀: unknown.
Comparative notes: This species is readily distinguished from R. malaysiensis by several external characters alone, particularly its larger body size (R. malaysiensis: 2.7 mm), much more massive antennae with transverse antennomeres IV–X (R. malaysiensis: antennomeres IV–IX oblong), the different coloration of the femora (R. malaysiensis: bicoloured, brown with yellow bases), and the absence of microsculpture on the elytra and the abdomen. For illustrations of R. malaysiensis see PACE (2013).
Distribution and natural history: The type locality is situated in Doi Suthep, North Thailand. The specimens were collected with pitfall traps at an altitude of 1120 m.
description: Published as part of Assing, Volker, 2016, On some Lomechusini of the Palaearctic and Oriental regions (Coleoptera: Staphylinidae: Aleocharinae), pp. 13-111 in Beiträge Zur Entomologie = Contributions to Entomology 66 (1) on page 79, DOI: 10.21248/contrib.entomol.66.1.13-111, http://zenodo.org/record/6421171