Lobrathium chengzhifeii, Lin & Peng, 2022

Lin, Xiao-Bin, Chen, Xi & Peng, Zhong, 2022, A new species and additional records of Lobrathium Mulsant & Rey (Coleoptera Staphylinidae: Paederinae) from southern China, Zootaxa 5133 (2), pp. 241-246 : 244

Lobrathium chengzhifeii X.-B. Lin and Peng, new species

(Figs 2B, 4, 7)

Type material (2 ♂♂). Holotype ♂: “ China: Yunnan, Xishuangbanna, Menglong Town, Mengsong , 21°28’37’’N, 100°32’07’’E, 1570 m, 04.IV.2018, Peng, Shen & Cheng leg.” ( SNUC) ; Paratypes: 1 ♂: same data as holotype ( SNUC) .

Description. Measurements (in mm) and ratios: BL 6.45–7.23, FL 3.73–3.89, HL 0.88–0.92, HW 1.01–1.03, AnL 2.13–2.30, PL 1.13–1.14, PW 0.94–0.98, EL 1.16–1.20, AL 1.36–1.37, HL/HW 0.85–0.91, HW/PW 1.03–1.09, HL/PL 0.78–0.81, PL/PW 1.15–1.20, EL/PL 1.02–1.06.

Habitus as in Fig. 2B. Body blackish brown, middle of elytra with yellowish spot not reaching lateral and posterior margins; legs brown with paler tarsi, antennae dark brown to light brown.

Head weakly transverse, widest across eyes; posterior angles broadly rounded; punctation dense and 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.

Pronotum lateral margins convex in dorsal view, punctation somewhat sparser than that of head, but with impunctate midline, interstices glossy.

Elytral punctation coarse and dense, arranged in series; interstices without microsculpture. Hind wings apparently present.

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

Male. Sternites III–VI unmodified; sternite VII (Fig.4A) strongly transverse and with distinct median impression, this impression without pubescence, posterior margin broadly concave; sternite VIII (Fig. 4B) weakly transverse, with long and pronounced postero-median impression, this impression with moderately modified, stout and short black setae, posterior excision moderately broad and moderately deep, on either side of this excision with long dark setae; aedeagus as in Figs 4C, D, ventral process long, flattened, and apically convex in ventral view.

Female. Unknown.

Comparative notes. Regarding the morphology of the aedeagus, this species is similar to L. anatinum Li & Li, 2013 , from which it is distinguished by somewhat smaller body size, lighter coloration of the body, the chaetotaxy of the male sternite VIII, and a stouter and more acute ventral process of aedeagus. For illustrations of L. anatinum see Li et al. (2013: figure 2).

Etymology. The species is named after Zhi-Fei Cheng, who collected some of type specimens.

Distribution and natural history. The type species were sifted near a pond in Xishuangbanna, Yunnan in April ( Fig. 7 ).

Figures

FIGURE 5–8. Collecting sites. 5 habitats of Lobrathium anatinum in Guangxi 6 habitats of Lobrathium biaculeatum in Xizang 7 type locality of Lobrathium chengzhifeii 8 habitats of Lobrathium excisissimum in Xizang.