Rabdotodrusilla pectinata, 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 : 79

publication ID

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



persistent identifier


treatment provided by


scientific name

Rabdotodrusilla pectinata

sp. nov.

Rabdotodrusilla pectinata View in CoL spec. nov.

( Figs 123–125 View Figs 119–143 , 380–383 View Figs 379–395 )

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 View Figs 119–143 ) 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 View Figs 119–143 ) 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 View Figs 119–143 ) 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 View Figs 119–143 ) 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 View Figs 119–143 ) 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 View Figs 379–395 ) 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 View Figs 379–395 ) transverse and with weakly convex posterior margin; median lobe of aedeagus ( Figs 380–381 View Figs 379–395 ) 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.


Switzerland, Geneva, Museum d'Histoire Naturelle


Museum d'Histoire Naturelle

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF