Labomimus niger, Zhang & Li & Yin, 2019

Zhang, Yu-Qing, Li, Li-Zhen & Yin, Zi-Wei, 2019, Fifteen new species and a new country record of Labomimus Sharp from China, with a checklist of world species (Coleoptera: Staphylinidae: Pselaphinae), Zootaxa 4554 (2), pp. 497-531 : 518-520

Labomimus niger sp. nov.

( Figs. 16B , 18 )

Type material ( 1 ♂). Holotype: CHINA: ♂: ‘ China: Sichuan, Dayi County (大邑县), Xiling Xueshan (西岭雪山), 30°41′59′′N, 103°12′10′′E, mixed leaf litter, sifted, 2150 m, 29.VII.2015, Jiang, Peng, Tu, & Zhou leg.’ ( SNUC).

Diagnosis of male. Length approaching 3.50 mm; body black; antennomeres IX–X strongly modified, antennomere IX strongly expanded, obliquely connected with transverse antennomere X; short metaventral processes rounded apically; protrochanter with short, blunt ventral projection, profemur with large ventral spine, protibia with large, triangular apical spine; mesotrochanter with distinct ventral spine, mesotibia with tiny apical spine; aedeagus slightly asymmetric, with median lobe narrowing from middle toward apex.

Description. Male ( Fig. 16B ). Length 3.46 mm. Body black. Head longer than wide, HL 0.72 mm, HW 0.65 mm; eyes prominent, each composed of about 45 facets. Antenna with scape about 2.3 times as long as wide, antennomeres II–VII more or less elongate, antennomere VIII small and transverse, antennomere IX ( Fig. 18A ) strongly expanded, antennomere X transverse, obliquely connected with IX. Pronotum ( Fig. 18B ) slightly longer than wide, PL 0.68 mm, PW 0.65 mm, sides strongly angulate at apical two-fifths. Elytra much broader than long, EL 0.90 mm, EW 1.23 mm. Metaventral processes ( Fig. 18C ) short, rounded at apex in lateral view. Protrochanter ( Fig. 18D ) with short, blunt ventral spine, profemur with large ventral spine at middle, protibia ( Fig. 18E ) with triangular spine at apex; mesotrochanter ( Fig. 18F ) with distinct ventral spine, mesofemur strongly expanded at middle, mesotibia ( Fig. 18G ) with tiny spine at apex; metacoxa, metatrochanter, and metafemur ( Fig. 18H ) simple. Abdomen broad at base and narrowed posteriorly, AL 1.16 mm, AW 1.23 mm; tergite IV longest, more than twice as long as tergite V; sternite IX as in Fig. 18I . Length of aedeagus ( Fig. 18 J–L) 0.56 mm; median lobe asymmetric, narrowing apically; parameres short.

Female. Unknown. Distribution. China: Sichuan. Etymology. The specific epithet refers to the black body color of the new species. Comparative notes. The new species is most similar to L. venustus ( Yin & Li, 2012) from Yunnan in sharing similar forms of the antennal clubs and aedeagus. They can be separated by the mesotibia with a small apical spine (with large and long apical projection in L. venustus ), and the dark body color of the new species.

Figures

FIGURE 16. Dorsal habitus of Labomimus males. A. L. minshanus. B. L. niger. Scale bar: 1 mm.

FIGURE 18. Diagnostic features of Labomimus niger, male. A. Antennal club. B. Pronotum. C. Metaventral process, in lateral view. D. Protrochanter and profemur. E. Apex of protibia. F. Mesotrochanter and mesofemur. G. Apex of mesotibia. H. Metatrochanter and metafemur. I. Sternite IX. J–L. Aedeagus, in dorsal (J), lateral (K), and ventral (L) view. Scale bar: A, B, D, F, H = 0.3 mm; C, J, K, L = 0.2 mm; I = 0.1 mm; E, G = 0.05 mm.