Lathrobium jinxiuense Peng & Li

Peng, Zhong, Sun, Zhuo, Li, Li-Zhen & Zhao, Mei-Jun, 2015, Four new species and additional records of Domene and Lathrobium from the Dayao Mountains, southern China, ZooKeys 508, pp. 113-126 : 116

Taxon classification Animalia Coleoptera Staphylinidae

Lathrobium jinxiuense Peng & Li sp. n. Figs 4A, 5

Type material.

Holotype: ♂, labelled 'China: Guangxi Prov., Jinxiu Hsien, Qigongli, 24°09'07"N, 110°12'29"E, 1300 m, 16.VII.2014, Peng, Song, Yan & Yu leg.' (SNUC). Paratypes: 1 ♀, same label data as holotype (SNUC).

Description.

Measurements (in mm) and ratios: BL 6.85-6.91, FL 2.96-3.06, HL 0.78-0.85, HW 0.80-0.84, AnL 1.58-1.63, PL 1.05-1.09, PW 0.84-0.87, EL 0.59-0.63, AL 0.85, HL/HW 0.98-1.01, HW/PW 0.95-0.97, HL/PL 0.74-0.78, PL/PW 1.25, EL/PL 0.56-0.58.

Habitus as in Fig. 4A. Body brown, legs yellowish brown, antennae light brown.

Head approximately as long as broad; punctation moderately coarse and sparse, sparser in median dorsal portion; interstices with distinct microreticulation; eyes very small and composed of approximately 20 ommatidia.

Pronotum nearly parallel-sided; punctation similar to that of head; impunctate midline broad; interstices without microsculpture.

Elytral punctation moderately dense, shallow and ill-defined. Hind wings completely reduced. Protarsi with weakly pronounced sexual dimorphism.

Abdomen with fine and moderately dense punctation, that of tergite VII somewhat sparser than that of anterior tergites; interstices with shallow microsculpture; posterior margin of tergite VII without palisade fringe; tergite VIII without sexual dimorphism, posterior margin (Fig. 5A) obtusely angled in the middle.

Male. Sternites III-VI unmodified; sternite VII (Fig. 5D) with very shallow postero-median impression, this impression without distinctly modified setae, posterior margin weakly concave in the middle; sternite VIII (Fig. 5E) with very shallow median impression posteriorly, this impression without distinctly modified setae, posterior excision small and symmetrical; aedeagus as in Figs 5F, G, ventral process nearly symmetrical in ventral view and acute apically; dorsal plate with long and strongly sclerotized apical portion and with moderately sclerotized basal portion; internal sac with single long sclerotized spine.

Female. Posterior margin of sternite VIII (Fig. 5B) convex and with moderately dense micropubescence; tergite IX (Fig. 5C) almost completely divided; tergite X (Fig. 5C) nearly reaching anterior margin of tergite IX.

Comparative notes.

The new species resembles Lathrobium maoershanense Peng & Li, 2012 in habitus and the similarly derived morphology of the aedeagus, but differs from this species by the smaller posterior excision of the male sternite VIII, the more slender ventral process of the aedeagus and the shape of the female tergite VIII. For illustrations of Lathrobium maoershanense see Peng et al. (2012).

Etymology.

The specific epithet is derived from Jinxiu, where the type locality is situated.

Distribution and natural history.

The type locality is situated in Qigongli to the north of Jinxiu, central Guangxi. The specimens were sifted from leaf litter and humus in a beech forest at an altitude of 1,300 m, together with Lathrobium dayaoshanense Peng & Li, 2012.