Chinecallicerus feldmanni, Assing, 2019

Assing, Volker, 2019, Five new species oI Chinecallicerus Irom China (Coleoptera, Staphylinidae, Aleocharinae, Geostibini), Linzer biologische Beiträge 51 (1), pp. 285-302 : 299-300

Chinecallicerus feldmanni nov.sp. ( Figs 23-29 , 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 feldmanni sp. n., det. V. Assing 2018̎ (cAss).

E t y m o l o g y: This species is dedicated to Benedikt Feldmann (Münster), who made the holotypes of three species available for this study and who granted permission to retain all of them.

D e s c r i p t i o n: Body length 5.8 mm; length of forebody 2.6 mm. Habitus as in Fig. 23 . Coloration: head blackish; pronotum brown; elytra reddish-brown; abdomen blackish-brown with the paratergites, the posterior margins of tergites III-VI, the posteri- or portion of tergite VII, and all of tergite VIII reddish; legs yellowish-red; antennae reddish with antennomere I slightly darker; maxillary palpi yellowish-red with palpomere IV yellow.

Head ( Fig. 24 ) distinctly transverse, nearly 1.2 times as broad as long, broadest across eyes; lateral margins behind eyes converging and practically straight in dorsal view, posterior angles completely obsolete; dorsal surface flat, broadly and shallowly impressed in the middle; punctation dense and very fine, indistinct in the pronounced microreticulation; dorsal surface practically matt. Eyes large and strongly convex, much longer than distance from posterior margin of eye to posterior constriction of head in dorsal view. Antenna ( Fig. 23 ) moderately long (length 2.0 mm) and slender; antennomeres III asymmetric and somewhat curved basally, IV-VIII distinctly oblong and of subequal breadth, IX-X very weakly oblong, and XI slightly shorter than the combined length of IX and X. Maxillary palpomere III rather slender, nearly four times as long as broad.

Pronotum ( Fig. 24 ) large, 1.23 times as broad as long and 1.34 times as broad as head, very weakly convex in cross-section with median portion of disc extensively and shallowly impressed; lateral margins convex; posterior angles moderately marked; punctation dense, moderately fine, and defined; interstices without microsculpture.

Elytra ( Fig. 24 ) 1.08 times as long as pronotum; suture glossy and slightly elevated; punctation similar to that of pronotum, but slightly less fine; interstices without microsculpture. Hind wings fully developed. Legs moderately slender; length of metatibia 0.95 mm.

Abdomen ( Fig. 25 ) narrower than elytra; tergites III-V with shallow and practically impunctate anterior impressions; anterior portions of tergites VI and VII extensively impunctate; punctation of remainder of tergal surfaces distinct and moderately sparse, that of tergite VII very sparse; microsculpture absent except for shallow traces in posterior portion of tergite VII and on tergite VIII; posterior margin of tergite VII with palisade fringe.

♂: tergite VII with pronounced, distinctly elevated, and smooth tubercle in posteromedian portion; posterior margin of tergite VIII of very distinctive shape, with a pronounced lateral tooth on either side; median lobe of aedeagus 0.55 mm long, slender, shaped as in Figs 28-29 .

♀: unknown.

C o m p a r a t i v e n o t e s: This species is readily distinguished from all other Chinecallicerus species by the shapes and punctation of the head and the pronotum in combination with slender antennae. It is additionally characterized by the punctation of the abdomen and by the male sexual characters.

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: Thetypelocality( Map1 )and the circumstances of collection are identical to those of C. reuteri .

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 23-29: Chinecallicerus feldmanni: habitus (23); forebody (24); male abdomen (25); tergites VII and VIII of male abdomen (26); segments VII and VIII of male abdomen in dorso-lateral view (27); median lobe of aedeagus in lateral and in ventral view (28-29). Scale bars: 23-25: 1.0 mm; 26- 27: 0.5 mm; 28-29: 0.2 mm.