Labomimus schuelkei Yin & Li

Yin, Zi-Wei & Li, Li-Zhen, 2012, Notes on Michael Schuelke's pselaphine collections from China. - Tyrini. I. genera Labomimus Sharp, Linan Hlavac and Pselaphodes Westwood (Coleoptera, Staphylinidae, Pselaphinae), ZooKeys 251, pp. 83-118 : 89-90

Labomimus schuelkei Yin & Li sp. n. Figs 6B8

Type material

(1 ♂). Holotype: ♂, labeled 'China: Shaanxi, Qin Ling Shan / 110.06E, 34.27N / Hua Shan Mt. N Valley, 1200- / 1400 m, 118 km E Xi’an, sifted / 18.-20.08.1995, leg. M. Schülke // Eulasinus Sharp sp. / det. Brachat 2. 99 // Sammlung / M. Schülke / Berlin // M. SCHÜLKE Coll. / Staphylinidae , Pselaphinae / Labomimus sp. 4 / S. Nomura det., 2005' (cSch).

Diagnosis.

Reddish brown; length 3.92; postgenae strongly expanded laterally; antennomeres IX–XI enlarged, IX–X modified in the male; pronotum with lateral margins nearly rounded; metaventral processes short; metacoxae simple; aedeagus with asymmetric median lobe.

Description.

Male (Fig. 6B). Length 3.92. Head longer than wide, HL 0.89, HW 0.78; eyes each composed of about 20 facets. Antennal clubs as in Fig. 8A. Pronotum (Fig. 8B) slightly longer than wide, PL 0.76, PW 0.70, with lateral margins nearly rounded. Elytra wider than long, EL 0.89, EW 1.34. Metaventral processes short, apically narrowed (Fig. 8C). Protrochanters with tiny ventral spine, profemora simple (Fig. 8D); mesotrochanters (Fig. 8E) with one big spine and one smaller spine at ventral margin; metacoxae with elongate protuberance (Fig. 8F), metatrochanters and metafemora (Fig. 8G) simple. Abdomen broad at base and narrowed apically, AL 1.38, AW 1.37. Sternite IX as in Fig. 8H. Aedeagus length 0.62, asymmetric median lobe narrow (Figs 8 I–K).

Female. Unknown.

Comparative notes.

Labomimus schuelkei is placed close to Labomimus sichuanicus by sharing the postgenae being largely expanded laterally with a thickened posterior margin, and the strongly elongate antennomeres V–VIII. The two species can be readily separated by the large body size, the strongly modified antennomeres IX–X, and the aedeagus with the median lobe narrow dorsal-ventrally in Labomimus schuelkei , while Labomimus sichuanicus is much smaller (3.05-3.20 mm), has simple antennomeres IX–X, and has the aedeagus with a much broader median lobe ( Hlaváč et al. 2000).

Distribution.

Northwest China: Shaanxi.

Biology.

Probably sifted from leaf litter in a forest.

Etymology.

Named after Michael Schülke, a well-known specialist in Staphylinidae , who kindly provided all the material used in this paper.