Chinecallicerus reuteri, Assing, 2019

Assing, Volker, 2019, Five new species oI Chinecallicerus Irom China (Coleoptera, Staphylinidae, Aleocharinae, Geostibini), Linzer biologische Beiträge 51 (1), pp. 285-302 : 297-299

Chinecallicerus reuteri nov.sp. ( Figs 17-22 , Map 1 )

T

y p e m a t e r i a l: Holotype ♂: ̎ China, N-Sichuan, Huanglong Shan, 2611 m, Sanluogou vill., 32°46'50''N, 103°55'25''E, 15-17.VI.2018, leg. Reuter / Holotypus ♂ Chinecallicerus reuteri sp. n., det. V. Assing 2018̎ (cAss).

E t y m o l o g y: This species is dedicated to Christoph Reuter (Hamburg), who collected the type material of three new species described in the present study.

D e s c r i p t i o n: Body length 6.4 mm; length of forebody 2.7 mm. Habitus as in Fig. 17 . Coloration: body blackish with the humeral portions and the postero-sutural portions of the elytra extensively and diffusely pitchy-red; legs reddish with the femora

slightly darker; antennae reddish-brown with antennomeres I-III blackish-brown to black; maxillary palpi blackish with the apex of palpomere III paler and palpomere IV yellow.

Head ( Fig. 18 ) weakly oblong and of subquadrate shape, broadest across eyes; lateral margins behind eyes convex with the posterior angles indistinctly indicated; punctation very dense, along middle of dorsal surface with a moderately glossy band with sparse punctation; frons with shallow microreticulation. Eyes strongly convex, approximately 0.6-0.7 times as long as distance from posterior margin of eye to posterior constriction of head in dorsal view. Antenna ( Fig. 17 ) very long (length 2.4 mm) and moderately massive; antennomeres IV-V distinctly oblong, approximately 1.5 times as long as broad, VI-X slightly less oblong and basally broader than IV and V, and XI elongate, but shorter than the combined length of IX and X. Maxillary palpomere III rather slender, nearly four times as long as broad.

Pronotum ( Fig. 18 ) as broad as long and 1.21 times as broad as head; lateral margins weakly sinuate posteriorly in dorsal view; punctation extremely dense and granulose; interstices very narrow, but glossy.

Elytra ( Fig. 18 ) 0.92 times as long as pronotum; punctation extremely dense, somewhat asperate, partly slightly granulose and shallow, rather weakly defined; surface matt. Hind wings fully developed. Legs very long and slender; length of metatibia 1.15 mm.

Abdomen ( Fig. 19 ) narrower than elytra; tergites III-V with shallow and rather coarsely punctate anterior impressions, punctation of remainder of tergal surfaces dense and distinct, slightly less dense on tergite VI than on tergite IV; tergite VII practically impunctate in anterior half and rather sparsely punctate in posterior half; interstices with very shallow and fine transverse microstriae visible only at high magnification (100 x); posterior margin of tergite VII with palisade fringe.

♂: posterior margin of tergite III broadly and smoothly elevated in the middle; tergite IV with oblong median tubercle; tergite VII ( Fig. 20 ) with pronounced tooth-shaped tubercle in postero-median portion; posterior margin of tergite VIII smooth and nearly truncate in the middle; median lobe of aedeagus robust, shaped as in Figs 21-22 .

♀: unknown.

C o m p a r a t i v e n o t e s: Based on external characters (habitus, punctation, etc.), C. reuteri is closely allied to C. formidabilis and C. granulosissimus (males of both species unknown). It is distinguished from both of them by distinctly smaller body size and additionally as follows:

from C. formidabilis by the coloration of the elytra and the antennae, shorter and less massive antennae with a much smaller, more oblong, and basally more slender antennomere IV, different head shape, less convex eyes, a distinctly more slender and more convex (cross-section) pronotum with sinuate lateral margins and granulose punctation, more asperate and less defined punctation of the elytra, and by coarsely punctate anterior impressions of the abdominal tergites III-V;

from C. granulosissimus (antenna unknown) by darker elytra and abdomen (C. granulosissimus: posterior margins of tergites III-VII and posterior portion of tergite VIII reddish), a differently shaped head with non-granulose punctation (C. granulosissimus: lateral margins behind eyes straightly converging; punctation distinctly granulose), a relatively smaller and less convex pronotum with sinuate lateral margins posteriorly, and by less dense and finer punctation of the abdomen.

D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: Thetypelocalityissituatedin North Sichuan ( Map 1 ). The holotype was collected with pitfall traps in a shady moist forest at the foot of a rock wall (REUTER pers. comm.) at an altitude of approximately 2610 m, together with the following species.

Figures

Map 1: Distributions of Chinecallicerus species in China: C. granulosissimus (white circle); C. formidabilis (black circle); C. wrasei (white star); C. glabriventris (black star); C. reuteri (white triangle); C. feldmanni (white triangle); C. discrepans (black triangle).

Figs 17-22: Chinecallicerus reuteri: habitus (17); forebody (18); male abdomen (19); segments VII and VIII of male abdomen in dorso-lateral view (20); median lobe of aedeagus in lateral and in ventral view (21-22). Scale bars: 17-19: 1.0 mm; 20: 0.5 mm; 21-22: 0.2 mm.