Batrisodes abdominalis, 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 : 13

Batrisodes abdominalis sp. n. Figure 1

Type material

(1 ex.). Holotype: CHINA: ♂, labeled 'China: Zhejiang Prov., Linan County (临安县), West Tianmushan (西天目山), 06.v.2012, 1200 m, Wen-Xuan Bi leg.' (SNUC).

Diagnosis of male.

The new species can be separated from other Chinese Batrisodes species by the following combination of characters: all antennomeres longer than wide; antennomeres X and XI each with a small denticle on the ventral side; mesofemur with a long protuberance near base, sternite V with a small spine at middle, and the slender, asymmetrical aedeagus with an elongate dorsal lobe.

Description.

Male. (Fig. 1A), Body reddish brown, BL 2.62 mm. Head slightly wider than long, HL 0.51 mm, HW 0.57 mm, rectangular and covered with short hair, with large 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 75 facets; Antennomeres II–XI longer than wide, IX–X (Fig. 1B) slightly enlarged, X with small denticle near basal 1/3; XI largest, nearly 2.5 times as long as X, with small denticle near base. Pronotum longer than wide, PL 0.63 mm, PW 0.55 mm, disc slightly convex, with small median antebasal foveae, median and lateral longitudinal sulci distinct; lateral antebasal fovea large and distinct; outer and inner basolateral foveae small but distinct. Elytra wider than long, without punctation and covered with sparse short hair, EL 0.89 mm, EW 0.97 mm, each elytron with three distinct basal foveae, discal striae shallow and unobvious. Mesofemora (Fig. 1C) with long distinct ventral spine near 1/3; mesotibiae (Fig. 1D) with short obtuse apical spine. Abdomen much wider than long, AL 0.59 mm, AW 0.81 mm; tergite IV longest, more than twice longer than next, with obvious oblique marginal carinae; sternite V (Fig. 1H) with small spine at middle. Aedeagus (Fig. 1 E–G) slender and asymmetrical, median lobe simple with two elongate lobes. Length of aedeagus 0.61 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 small spine on male sternite V.