Lobrathium anatinum Li & Li

Li, Wen-Rong, Zhao, Mei-Jun, Dai, Cong-Chao & Li, Li-Zhen, 2013, New species and records of Lobrathium Mulsant & Rey (Coleoptera, Staphylinidae, Paederinae) from China, ZooKeys 304, pp. 49-81 : 54

Lobrathium anatinum Li & Li sp. n. Figs 2

Type material

(2 ♂♂). Holotype, ♂: "China, Guangxi, Lingui County, Anjiangping, 1700 m, 25°33'N, 109°55'E, 17 –VII– 2011, Peng Zhong leg. / Holotype ♂, Lobrathium anatinum , sp. n. Li & Li, det. 2013". Paratype, ♂: "China, Guangxi, Lingui County, Anjiangping, 1400-1700 m, 25°33'N, 109°56'E, 14 –VII– 2011, Peng Zhong leg. / Paratype ♂, Lobrathium anatinum , sp. n. Li & Li, det. 2013".

Description.

Body length 7.28-7.89 mm, length of fore body 3.89-4.0 mm. Habitus as in Fig. 2A. Coloration: body black with distinct bluish hue, middle of elytra with yellowish spot not reaching lateral and posterior margins; legs blackish with paler tarsi, antennae dark brownish to blackish.

Head weakly transverse (HW/HL = 1.10-1.11), widest across eyes; posterior angles broadly rounded; punctation dense and moderately coarse, sparser in median dorsal portion; interstices without microsculpture. Eyes large, more than half as long as distance from posterior margin of eye to neck in dorsal view. Antenna long and slender, 1.96-2.22 mm long.

Pronotum 1.24-1.30 times as long as broad, as wide as head (PW/HW = 1.0), lateral margins convex in dorsal view, punctation similar to that of head, but with impunctate midline, interstices glossy.

Elytra wider than pronotum and nearly as long as pronotum (EL/EW = 0.95-1.0, EW/PW = 1.15-1.3, EL/PL = 0.91-0.94); punctation coarse and dense, arranged in series; interstices without microsculpture. Hind wings apparently present.

Abdomen broader than elytra; punctation fine and dense; posterior margin of tergite VII with palisade fringe.

Male. Sternite VII (Fig. 2D) strongly transverse and with distinct median impression, this impression without pubescence, posterior margin broadly concave; sternite VIII (Fig. 2E) weakly transverse, with long and pronounced postero-median impression, this impression with numerous modified, stout and short black setae, posterior excision moderately broad and moderately deep, on either side of this excision with long dark setae; aedeagus (Figs 2B, C) 1.70-1.72 mm long, ventral process long, flattened, and apically convex in ventral view.

Female. Unknown.

Etymology.

The specific epithet (Latin, adjective: of a duck) refers to the shape of the ventral process of the aedeagus, which somewhat resembles the mouth of a duckbill.

Comparative notes.

This species is close to Lobrathium ablectum Assing (2012) in sharing a similar shape and chaetotaxy of the sternites VII and VIII. The new species differs from Lobrathium ablectum by larger body size, and by the longer, apically not bifid ventral process of the aedeagus.

Habitat and distribution.

The present species was sifted from wet moss near a cold stream (Fig. 20A) in the Angjiangping National Reserve, Guangxi (Fig. 19), in July.