Labomimus dulongensis, 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 : 506-508

Labomimus dulongensis sp. nov.

( Figs 7A , 8 )

Type material (3 ♂♂). Holotype: CHINA: ♂: ‘ China : Yunnan, Gongshan Co. (贡山县), Dulongjiang To. (独龙 江乡), Xiongdang (雄当), 28°06′30.31′′N, 98°19′23.59′′E, 1925 m, 10.vii.2015, Chao Wu leg.’ (SNUC). Paratypes: CHINA: 2 ♂♂: same data as the holotype, (all in SNUC)

Diagnosis of male. Length slightly below 3.0 mm; antennomeres IX–X enlarged; antennomere IX strongly expanded, with small process of mesal margin near apex; extremely long metaventral processes narrowing toward apex; all legs extremely elongate; protibia with round apical projection; mesotrochanter with tiny ventral spine; elongate aedeagus slightly asymmetric, with median lobe narrowed and pointed at apex.

Description. Male ( Fig. 7A ). Length 2.88–2.94 mm. Head slightly longer than wide, HL 0.57–0.58 mm, HW 0.52–0.54 mm; eyes prominent, each composed of about 32 facets. Antenna with scape about 3.8 times as long as wide, antennomeres II–VIII each slightly to strongly elongate, antennomere IX ( Fig. 8A ) strongly expanded laterally, with small process near apex of mesal margin; antennomeres X subquadrate. Pronotum ( Fig. 8B ) slightly longer than wide, PL 0.54–0.57 mm, PW 0.50–0.52 mm, sides slightly roundly-angulate at apical two-fifths. Elytra much broader than long, EL 0.76–0.77 mm, EW 0.95–0.97 mm. All legs extremely elongate; metaventral processes ( Fig. 8C ) extremely long, narrowing apically. Protrochanter and profemur ( Fig. 8D ) simple, protibia ( Fig. 8E ) with round apical projection; mesotrochanter ( Fig. 8F ) with tiny ventral spine, mesofemur simple; metacoxa, metatrochanter, and metafemur ( Fig. 8G ) simple. Abdomen broad at base and narrowed posteriorly, AL 1.01–1.02 mm, AW 0.98–1.01 mm; tergite IV longest, more than twice as long as tergite V; sternite IX as in Fig. 8H . Length of aedeagus ( Fig. 8 I–K) 0.46 mm; median lobe asymmetric at apex, narrowing apically; elongate parameres moderately broadened dorso-ventrally, rounded at apex.

Female. Unknown.

Distribution. China: Yunnan.

Etymology. The new species is named after the type locality, Dulongjiang County.

Comparative notes. The new species appears to be similar to L. torticornis (Champion) from Assam, northeastern India in sharing a similar head form, the strongly sulcate median longitudinal impression of the pronotum, the relatively simple legs, and the elongate parameres of the aedeagus. They can be readily separated by the form of the antennomere IX, presence of a round apical projection of the protibia in the male, and broader apical portion of the median lobe of the aedeagus.

Figures

FIGURE 7. Dorsal habitus of Labomimus males. A. L. dulongensis. B. L. howaichuni. Scale bar: 1 mm.

FIGURE 8. Diagnostic features of Labomimus dulongensis, 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. Metatrochanter and metafemur. H. Sternite IX. I–K. Aedeagus, in dorsal (I), lateral (J), and ventral (K) view. Scale bar: A, B, D, F, G = 0.3 mm; C, I, J, K = 0.2 mm; H = 0.1 mm; E = 0.05 mm.