Labomimus sichuanicus Hlavac , Nomura & Zhou

Yin, Zi-Wei, Hlavac, Peter & Li, Li-Zhen, 2013, Further studies on the Pselaphodes complex of genera from China (Coleoptera, Staphylinidae, Pselaphinae), ZooKeys 275, pp. 23-65 : 32-33

Labomimus sichuanicus Hlavac, Nomura & Zhou Figs 4B6

Labomimus sichuanicus Hlaváč, Nomura & Zhou, 2000: 149. Type locality: Qingchengshan Mountain, Sichuan, Southwest China.

Type material examined.

Paratype: ♂ [with aedeagus, tergite VIII and sternite VIII dissected, preserved in Canada balsam on a plastic plate pinned under the specimen], labeled 'Wolong (1,770-1,790 m) / Wenchuan Xian / Sichuan Prov. // SE-China [should be SW-China] / 24.xi.1996, S. Nomura leg. // PARATYPE [blue] / Labomimus sichuanicus / Hlaváč, Nomura et Zhou’ (NSMT).

Other material examined

(5 ♂♂, 10 ♀♀). 3 ♂♂, 9 ♀♀, labeled 'CHINA: Sichuan, Dujiangyan City / Qingchengshan Mt., pass near / Baiyun Temple, 30°56'55"N, 103°28'28"E, 1650 m (bamboo / leaf, dead wood, sifted), 2012.vii.27 / C. C. Dai, Z. Peng & Z. W. Yin leg.'. 2 ♂♂, 1 ♀, same label data, except '1700 m’ (all SNUC).

Diagnosis.

Reddish brown; length 3.40-3.69; postgenae broadly expanded laterally; antennomeres IX–XI enlarged, simple in both sexes; pronotum rounded at anterolateral margins; male with short metaventral processes; metacoxae spinose ventrally; aedeagus with asymmetric median lobe.

Redescription.

Male (Fig. 4B). Length 3.40-3.50. Head longer than wide, HL 0.86-0.87, HW 0.68-0.72; eyes each composed of about 35 facets. Antennal clubs as in Fig. 6A. Pronotum (Fig. 6B) slightly longer than wide, PL 0.76-0.83, PW 0.74-0.75, rounded at anterolateral margins. Elytra wider than long, EL 0.86-0.87, EW 1.23-1.25. Metaventral processes very short (Fig. 6C). Protrochanters and profemora simple (Fig. 6D), protibiae with tiny apical spur (Fig. 6E); mesotrochanters with small ventral spine, mesofemora simple (Fig. 6F); metacoxae with short ventral protuberance, metatrochanters and metafemora simple (Fig. 6G). Abdomen broad at base and narrowed apically, AL 0.92-0.93, AW 1.31-1.38. Sternite IX as in Fig. 6H. Aedeagus length 0.55, with asymmetric median lobe elongate (Figs 3 I–K).

Female. Similar to male in general; BL 3.59-3.69, HL 0.87-0.89, HW 0.64-0.70, PL 0.77-0.81, PW 0.73-0.77, EL 0.82-0.83, EW 1.32-1.34, AL 1.13-1.16, AW 1.43-1.47. Eyes each composed of about 28 facets. Metaventral processes absent.

Comparative notes.

This species is placed in the same group as Labomimus shibatai Sawada, Labomimus dabashanus Yin & Li, and Labomimus schuelkei Yin & Li by sharing the laterally expanded postgenae. Labomimus sichuanicus is closest to Labomimus schuelkei by sharing the postgenae being largely expanded laterally together with a thickened posterior margin, and the strongly elongate antennomeres V–VIII. The two species can be readily separated by the simple antennomeres IX–X, and the aedeagus with a much broader median lobe in Labomimus sichuanicus , while Labomimus schuelkei has strongly modified antennomeres IX–X, and the aedeagal median lobe is strongly narrowed dorsoventrally.

Distribution.

Southwest China: Sichuan.

Biology.

Individuals were sifted from mixed broad-leaved and bamboo leaf litter in a bush.

Remarks.

This species was described from three males and two females from Qingchengshan Mountain (type locality) and Wolong Natural Reserve of the Sichuan Province. The holotype and paratypes preserved in the Institute of Zoology, Academia Sinica, Beijing cannot be located at this time (Zhou per. comm.). The descriptions and illustrations provided by Hlaváč et al. (2000: 150) as well as a comparison with a paratype housed in NSMT leave no doubt that the material listed above is conspecific with the holotype.