Lobrathium jianqingi Lue & Li

Taxon classification Animalia Coleoptera Staphylinidae

Lobrathium jianqingi Lue & Li View in CoL sp. n. Fig. 1

Type material.

Holotype: ♂, labelled 'China: Guangxi Prov., Shangsi County, Shiwanda Shan N. R., 21°54'16"N, 107°54'13"E, 300-500 m, 25.IV.2011, Zhu, Peng & Zhai leg. / HOLOTYPE [red], Lobrathium jianqingi sp. n., Lü & Li det. 2014, SNUC’. Paratype, 1 ♀: same data as holotype.

Description.

Body length 6.84-7.34 mm, length of forebody 3.73-3.78 mm. Habitus as in Fig. 1A. Coloration: body black, elytra with blue hue and subcircular large yellow spot, this spot reaching neither suture, nor lateral or posterior margins; legs black with paler tarsi, antennae blackish brown to dark brown.

Head weakly transverse (HW/HL 1.23-1.28); posterior angles broadly rounded, weakly marked; punctation dense and coarse, sparser in median dorsal portion; interstices without microsculpture. Eyes large, approximately half as long as distance from posterior margin of eye to neck in dorsal view. Antenna slender, 2.22 mm long.

Pronotum 1.13-1.24 times as long as broad and 0.90-0.97 times as wide as head, lateral margins weakly convex in dorsal view; punctation similar to that of head, midline with broad and complete impunctate band; interstices without microsculpture.

Elytra distinctly broader and longer than pronotum (EW/PW 1.33-1.39; EL/PL 1.08-1.17), humeral angles marked; punctation dense and coarse; interstices without microsculpture and glossy. Hind wings fully developed.

Abdomen narrower than elytra; punctation very fine and dense, dorsal surface nearly matt; posterior margin of tergite VII with palisade fringe.

Male: Sternites III–VI unmodified; sternite VII (Fig. 1D) strongly transverse with median impression posteriorly, this impression impunctate in the middle and on either side of middle with pubescence diagonally directed postero-mediad, posterior margin broadly and deeply concave; sternite VIII (Fig. 1E) weakly oblong, with pronounced long median impression, this impression with numerous modified, short and stout black setae, posterior excision relatively deep and almost U-shaped; aedeagus (Figs 1B, C) 1.37 mm long, ventral process long and spear-shaped apically in ventral view.

Female: Posterior margin of tergite VIII (Fig. 1F) weakly convex; posterior margin of sternite VIII (Fig. 1E) broadly convex; tergite IX (Fig. 1H) undivided anteriorly; tergite X of subovoid shape.

Distribution and natural history.

The type locality is situated in the Shiwanda Shan Natural Reserve, to the south of Shangsi, southern Guangxi. The specimens were found on the bank of a stream at altitudes of 300-500 m.

Etymology.

The species is named after Jian-Qing Zhu, one of collectors of the type specimens.

Remarks.

In external characters (moderate size, black body, elytra with large subcircular yellow spot), the chaetotaxy of the male sternites VII and VIII and the morphology of the aedeagus (especially long ventral process), Lobrathium jianqingi is most similar to Lobrathium anatinum Li & Li, 2013 from Guangxi. The new species is distinguished from Lobrathium anatinum by the more deeply concave posterior margin of the male sternite VII, the deeper posterior excision of the oblong male sternite VIII, and by the shape of the ventral process of the aedeagus in lateral view. For illustrations of Lobrathium anatinum see Li et al. (2013a).