Cephalocousya yunnanica, Assing, 2018

Assing, Volker, 2018, New species and additional records of Cephalocousya and Drepasiagonusa from China and Russia (Coleoptera: Staphylinidae: Aleocharinae: Oxypodini), Linzer biologische Beiträge 50 (1), pp. 75-88 : 76-77

Cephalocousya yunnanica nov.sp. ( Figs 1-3 )

T y p e m a t e r i a l: Holotype ♀: " CHINA: N-Yunnan Diqing Tibet. Aut. Pr. Deqin Co. Baima Shan, pass 25 km SE Deqin, 28°19.38'N, 99°05.47'E 4225 m, 8.VI.2005 A Smetana [C154] / Holotypus ♀ Cephalocousya yunnanica sp.n., det. V. Assing 2018" (cSme) . Paratypes: 1♀: same data as holotype (cAss) ; 3♀♀: " CHINA: N-Yunnan [2005-06], Diqing Tibet. Aut. Pref., Deqin Co., Baima Shan , pass 25 km SE Deqin, 4225 m / 28°19.38'N, 99°05.47'E, small creek valley, Rhododendron, Salix, leaf litter, moss, dead wood, sifted, 8.VI.2005, M. Schülke [C2005-6]" (MNB, cAss) .

E t y m o l o g y: The specific epithet is an adjective derived from Yunnan, the Chinese province where the type locality is situated.

D e s c r i p t i o n: Body length 3.8-3.9 mm; length of forebody 1.7 mm. Habitus as in Fig. 1 . Coloration: body including antennae and maxillary palpi blackish; legs reddishbrown.

Head approximately as broad as long and of orbicular shape; punctation moderately sparse and extremely fine; interstices with shallow microreticulation and some shine. Eyes small, approximately half as long as postocular region in dorsal view. Antenna approximately 0.9 mm long; antennomere IV weakly transverse; antennomeres V-X distinctly transverse and gradually increasing in width, X approximately 1.5 times as broad as long.

Pronotum approximately 1.15 times as broad as long and 1.1 times as broad as head, broadest in anterior half; punctation denser and more distinct than that of head; interstices with shallow microsculpture and glossy.

Elytra 0.90-0.95 times as long as pronotum; punctation dense and shallow, slightly more distinct than that of pronotum; interstices with shallow microsculpture. Hind wings not examined. Metatarsomere I approximately as long as the combined length of II-IV.

Abdomen approximately as broad as elytra; tergites III-V with moderately shallow, tergite VI with even shallower anterior impressions; punctation dense and fine; microreticulation distinct on all tergites, particularly so in the anterior impressions of tergites III- VI; posterior margin of tergite VII with palisade fringe.

♂: unknown.

♀: posterior margin of tergite VIII convex; posterior margin of sternite VIII weakly convex, in the middle shallowly concave; spermatheca as in Figs 2-3.

C o m p a r a t i v e n o t e s: Cephalocousya yunnanica is distinguished from C. nivicola by a distinctly more glossy forebody owing to the shallower microsculpture, a more glossy abdomen, a larger head (in relation to pronotum), a larger abdomen ( C. nivicola : abdomen narrower than elytra), and by the shape of the spermatheca.

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: Cephalocousya yunnanica is currently the sole representative of the genus in China. The Baima Shan (type locality) is situated in Northwest Yunnan. The specimens were collected at an altitude of 4425 m.

Figures

Figs 1-9: Cephalocousya yunnanica (1-3), Drepasiagonusa smetanai (4-5), and D. procera (6-9): habitus (1, 6); spermatheca (2-3, 5); median lobe of aedeagus in lateral view (4); forebody (7); antenna (8); abdomen (9). Scale bars: 1, 6: 1.0 mm; 7-9: 0.5 mm; 2-3: 0.2 mm; 4-5: 0.1 mm.