Chinecallicerus carinatus, Assing, 2018

Assing, Volker, 2018, Six new species of Chinecallicerus from China, with a new synonymy (Coleoptera: Staphylinidae: Aleocharinae: Geostibini), Linzer biologische Beiträge 50 (1), pp. 47-63 : 51-57

Chinecallicerus carinatus nov.sp. ( Figs 1-6 , Map 1 )

T y p e m a t e r i a l: 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 ♂ Chinecallicerus carinatus sp. n., det. V. Assing 2017" (SCS). Paratypes: 1♂, 1♀: same data as holotype (MMB, cAss).

E t y m o l o g y: The specific epithet (Latin, adjective) alludes to the sharp median carina on the male tergite VII.

D e s c r i p t i o n: Body length 3.8-4.5 mm; length of forebody 1.9-2.0 mm. Coloration: head blackish; pronotum dark reddish-brown; elytra pale-brown; abdomen blackish with the apex and mostly also the anterior segments somewhat paler; legs yellow; antennae reddish to brown with the basal antennomeres at least slightly paler; maxillary palpi yellowish.

Head ( Fig. 1 ) approximately as long as broad and of subquadrate shape; punctation very fine, barely noticeable in the pronounced microreticulation; dorsal surface practically matt. Eyes moderately convex and rather small, much shorter than distance from posterior margin of eye to posterior constriction of head in dorsal view. Antenna ( Fig. 1 ) approximately 1.5 mm long; antennomeres IV more distinctly, V-X weakly transverse.

Pronotum ( Fig. 1 ) weakly transverse, barely 1.1 times as broad as long and 1.3-1.4 times as broad as head, broadest slightly before middle; punctation and microsculpture similar to those of head; surface practically matt; pubescence of midline directed caudad.

Elytra ( Fig. 1 ) approximately 0.9 times as long as pronotum; punctation very dense and very fine, barely noticeable in the pronounced microreticulation; surface nearly matt. Hind wings fully developed.

Abdomen narrower than elytra; punctation moderately dense and fine on tergites III-VI, very sparse on tergite VII; transverse microsculpture very shallow on tergites III-VI, more distinct on tergite VII; tergites III and IV without sexual dimorphism; posterior margin of tergite VII with palisade fringe.

♂: tergite VII with sharp and relatively long median carina posteriorly ( Figs 2-3 ) ; posterior margin of tergite VIII smoothly convex ( Fig. 2 ); sternite VIII with strongly convex posterior margin; median lobe of aedeagus 0.45 mm long and shaped as in Figs 4-5 .

♀: tergite VIII shaped as in male ; sternite VIII with broadly and weakly convex posterior margin; spermatheca shaped as in Fig. 6.

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: The type locality is situated in Xiao Zhaizi National Nature Rerserve ( China: North Sichuan) ( Map 1 ). The specimens were collected with a flight interception trap at an altitude of 1560-1700 m.

Figures

Map 1: Distributions of Chinecallicerus species in China: C. wrasei (black diamond); C. schuelkei (white circle); C. laevigatus and C. serratus (both black circle); C. subater (white diamond); C. reticulatus (black star); C. pinnatus (black triangle); C. grandicollis (grey star); C. carinatus (white triangle); C. orbiculatus (white star); C. transversus (black square); C. granulosissimus (white square); C. trituberculatus (grey triangle).

Figs 1-6: Chinecallicerus carinatus: forebody (1); male abdominal segments VI-VIII (2); male abdominal tergites VII-VIII in lateral view (3); median lobe of aedeagus in lateral and in ventral view (4-5); spermatheca (6). Scale bars: 1: 1.0 mm; 2: 0.5 mm; 3: 0.2 mm; 4-6: 0.1 mm.