Lathrobium uncum, Peng, Zhong, Li, Li-Zhen & Zhao, Mei-Jun, 2012

Peng, Zhong, Li, Li-Zhen & Zhao, Mei-Jun, 2012, Taxonomic study on Lathrobium Gravenhorst (Coleoptera, Staphylinidae, Paederinae) from Longwangshan Mountain, East China, ZooKeys 165, pp. 21-32 : 24

Lathrobium uncum sp. n. Figs 2A6

Type locality.

Longwangshan Nature Reserve, Zhejiang Province, East China

Type material

(7 ♂♂, 5 ♀♀). Holotype: ♂, labeled 'CHINA: zhejiang Prov. / Anji County / Longwang Mt. / 25.iv.2006, alt. 950-1,200 m / Tang Liang leg.'. Paratypes: 7 ♂♂, 5 ♀, same label data as holotype; 1 ♂, 4 ♀♀, same, but 'Qianmutian / 27.v.2009, alt. 1,300 m/ Yuan, Liu, Feng & Yin leg.'.

Description.

Measurements and ratios: BL 5.35-5.93. Holotype: HL 0.78, HW 0.81, PL 1.02, PW 0.82, EL 0.72, HL/HW 0.97, HW/PW 0.98, HL/PL 0.77, PL/PW 1.25, EL/PL 0.70.

Habitus as in Fig. 2A. Externally similar to Lathrobium lingae , except for the lighter average coloration, the somewhat smaller body size and the sparser punctation on the head and the pronotum.

Male. Sternite VII (Fig. 6A) with a group of coarse setae at middle; sternite VIII (Fig. 6B) with half elliptical median emargination, two rows of modified setae in large but faint apical impression and another row along the posterior margin; sternite IX (Fig. 6C) with cuttle-bone-shaped impression; aedeagus (Fig. 6D, 6E) with a hook-shaped ventral process.

Female. Tergite VIII (Fig. 6F) with posterior margin saliently curved; sternite VIII (Fig. 6G) weakly convex posteriorly and with inconspicuous micropubescence; tergite IX (Fig. 6H) (not separated from X), with long lateral processes; tergite X relatively short.

Distribution.

East China (Zhejiang: Longwangshan Mountain).

Etymology.

The specific name ‘uncum’ (Latin adjective) means ‘hooked’.

Remarks.

The new species and Lathrobium tamurai from Zhejiang share many features, particularly the general form. They can be readily distinguished by the male sternite VII lacking an impression and with several modified discal setae, male sternite VIII with two rows of modified setae in large but faint apical impression and another row along the posterior margin, and slender aedeagus with the ventral process being hook-shaped in Lathrobium uncum , whereas in Lathrobium tamurai , the male sternite VII has the impression evenly covered with modified setae on each side of the median part; the male sternite VIII has a horseshoe-shaped impression with dense modified setae; and the robust aedeagus has a straight ventral process.