Batricavus abdominalis Yin & Li

Yin, Zi-Wei & Li, Li-Zhen, 2012, Two new species and new record of Batricavus Yin & Li (Coleoptera, Staphylinidae, Pselaphinae) from China, ZooKeys 215, pp. 33-39 : 35

Batricavus abdominalis Yin & Li sp. n. Figs 1A2

Type-locality.

China, Hainan Province: Lingshui County, Diaoluoshan Natural Reserve, 18°43'36.93"N, 109°52'55.21"E, 950 m a.s.l.

Type material.

(8 ♂♂, 24 ♀♀) Holotype: ♂, labeled, 'China: Hainan Prov. / Diaoluoshan N. R. / road to reservoir / 25.iv.2012, 950 m / Pan et Li leg.'. Paratypes: 2 ♂, 8 ♀♀, same label data as holotype; 1♂, 1♀, same label data except 'Zi-Wei Yin leg.'; 4 ♂♂, 15 ♀♀, same label data except 'Dai et Peng leg.'.

Other material examined.

5 ♂♂, 6 ♀♀, labeled 'China: Hainan Prov. / Ledong County / Jianfengling N. R. / 15.xi.2005 / Jian-Hua Huang leg.'.

Diagnosis.

Length 1.50-1.60; antennal club three-segmented, lacking obvious modification in male; male with simple protibiae and modified metafemora and tergite IV.

Description.

Male. Length 1.50-1.59; body (Fig. 1A) reddish brown, maxillary palpi and tarsi lighter. Head slightly wider than long, HL 0.34-0.35, HW 0.39-0.41. Eyes each composed of about 20 large facets. Antennal club three-segmented, segment VIII smallest, IX–XI enlarged. Pronotum rounded laterally, slightly wider than long, PL 0.38-0.40, PW 0.42-0.46. Elytra wider than long, EL 0.53-0.57, EW 0.61-0.63, with scattered long setae. Protibiae simple; metafemora broadened mesally at apical 1/4 (Fig. 2B). Abdomen much narrower than elytra, AL 0.25-0.27, AW 0.53-0.55; tergite IV (Fig. 2A) with large median cavity comprising complicated structure. Aedeagus (Figs 2C, D) length 0.20, well-sclerotized, with elongate dorsal lobe.

Female. Measurements: BL 1.54-1.60, HL 0.33-0.34, HW 0.40-0.41, PL 0.37-0.38, PW 0.41-0.43, EL 0.50-0.53, EW 0.60-0.63, AL 0.34-0.35, AW 0.56-0.58.

Generally similar to male; eyes smaller, each composed of about 15 facets; tergite VIII (Fig. 2E) with smooth posterior margin; genital complex (Fig. 2F) transverse, width 0.24, well sclerotized.

Distribution.

South China: Hainan.

Etymology.

The specific epithet refers to the male sexual character present on abdominal tergite IV.