Batrisodes tianmuensis, Jiang, Ri-Xin & Yin, Zi-Wei, 2017

Jiang, Ri-Xin & Yin, Zi-Wei, 2017, Eight new species of Batrisodes Reitter from China (Coleoptera, Staphylinidae, Pselaphinae), ZooKeys 694, pp. 11-30 : 21

Batrisodes tianmuensis sp. n. Fig. 7

Type material.

(1 ex.). Holotype: CHINA: ♂, labeled 'China: Zhejiang, Linan County, West Tianmushan, 13.iv.2017, 310 m, 30°18'54"N, 119°26'35"E, ant nest under rock, Song Xiaobin leg.' (SNUC).

Diagnosis of male.

Batrisodes tianmuensis can be separated from all other Chinese congeners by the following combination of characters: antennomeres XI strongly concave at the ventral margin and with an acute basal projection, smooth pronotum lacking median antebasal foveae and inner and outer basolateral foveae, mesofemur with a small ventral spine at middle, mesotibia with a blunt apical protuberance, and aedeagus with an elongate, broad dorsal lobe suddenly pointed at the apex.

Description.

Male. (Fig. 7A), Body reddish brown, BL 2.52 mm. Head wider than long, rectangular and covered with sparse short hair, HL 0.51 mm, HW 0.57 mm, with small vertexal foveae; antennal tubercles prominent; area between moderately raised antennal tubercles concave and impunctate; clypeus slightly punctate, with round anterior margin; lateral longitudinal carinae slight, extending from level of eyes to head base, lacking median vertexal carina. Each eye composed of about 55 facets. Antennomeres II–X moniliform, XI (Fig. 7B) largest, approximately 3 times as long as X, strongly concave at mesal surface, with acute denticle near base. Pronotum slightly longer than wide, PL 0.55 mm, PW 0.52 mm, smooth with sparse short hair; disc slightly convex, without median antebasal foveae and median longitudinal sulci; lateral longitudinal sulci shallow, lateral antebasal fovea small and indistinct; lacking outer and inner basolateral foveae. Elytra wider than long, smooth and covered with sparse short hair, EL 0.87 mm, EW 0.99 mm; each elytron with three small basal foveae, discal striae shallow and indistinct. Mesofemora (Fig. 7C) with small thin ventral spine near middle; mesotibiae (Fig. 7D) with small triangular apical spine. Abdomen much wider than long, AL 0.62 mm, AW 0.95 mm; tergite IV longest, nearly 2.5 times as long as next, with shallow oblique marginal carinae. Aedeagus (Fig. 7 E–G) strongly asymmetrical, median lobe with long, broad dorsal lobe pointed at apex; length of aedeagus 0.49 mm.

Female. Unknown.

Distribution.

East China: Zhejiang.

Host ant.

Ectomomyrmex sp.

Biology.

The new species was collected from an ant colony nesting under a stone.

Etymology.

The specific epithet refers to the type locality of the new species, the West Tianmu Mountain.