Batrisodes simianshanus, 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 : 17-21

Batrisodes simianshanus sp. n. Figs 5, 6, 13

Type material

(8 exs). Holotype: CHINA: ♂, labeled 'China: Chongqing, Simian Shan N. R. (四面山自然保护区), Sunzigou (笋子沟), 28°41'47"N, 106°22'49"E, 751 m, 06.iii.2016, ant nest under rock, XU Hao & QIU Jianyue leg.' (SNUC). Paratypes: CHINA: 1 ♂, 3 ♀♀, same label data as the holotype (SNUC); 2 ♂♂, 1 ♀, labeled 'China, Chongqing City, Jiangjin District (江津区), Simianshan N. R. (四面山自然保护区), Motianling (摩天岭), ant nest under rock, 28°38'03"N, 106°22'59"E, 1220 m, 30.iv.2016, XU Hao & QIU Jianyue leg.' (SNUC).

Diagnosis of male.

Batrisodes simianshanus can be separated from all other Chinese congeners by the following combination of characters: ocular canthi present, antennomere XI with a small, acute denticle at mesal margin, pronotum lacking outer and inner basolateral foveae, median antebasal foveae small, mesofemur with a distinct ventral protuberance near base, mesotibiae with small apical spine, and symmetrical, robust aedeagus with the endophallus bearing a pair of elongate lateral sclerites.

Description.

Male. (Fig. 5A), Body reddish brown, BL 3.18-3.20 mm. Head wider than long, near rectangular, rough and covered with short hair HL 0.62- 0.63 mm, HW 0.68 mm, with large vertexal foveae, antennal tubercles prominent; area between obviously raised antennal tubercles concave and without hair; clypeus slightly punctate, with round anterior margin; lateral longitudinal carinae slight, extending from level of eyes to head base. Each eye composed of about 60 facets and with one short ocular spine. Antennomeres II–X moniliform, IX–XI (Fig. 6A) slightly expanded, XI large and longest, with small denticle near base. Pronotum nearly as long as wide, PL 0.69-0.70 mm, PW 0.65-0.68 mm, disc slightly convex; with much small media antebasal foveae, median and lateral longitudinal sulci shallow and unclear; lateral antebasal fovea large and distinct, without outer and inner basolateral foveae. Elytra slight wider than long, EL 0.99-1.01 mm, EW 1.14-1.16 mm; each elytron with three small but distinct basal foveae, discal striae shallow and short. Profemora (Fig. 6B) expanded at middle, mesofemora (Fig. 6C) with thin but distinct ventral protuberance near base and expanded at middle; mesotibiae (Fig. 6D) with small and indistinct triangular apical spine. Abdomen wider than long, AL 0.85-0.89 mm, AW 1.04-1.09 mm; tergite IV longest, twice as long as next, with shallow but distinct oblique marginal carinae. Aedeagus (Fig. 6 E–F) symmetrical and robust, median lobe simple, with pair of elongate lateral sclerites, length of aedeagus 0.44 mm.

Female (Fig. 5B). Similar to male, antennomere IX–XI less expanded, XI lacking denticle; each eye composed of about 50 facets; legs simple; tergite VIII (Fig. 6G) semicircular; sternite VIII (Fig. 6H) transverse; symmetrical genital complex (Fig. 6I) slightly sclerotized. Measurements of body parts: BL 3.01-3.04 mm, HL 0.62-0.63 mm, HW 0.63-0.64 mm, PL 0.66-0.68 mm, PW 0.65-0.66 mm, EL 0.98-0.99 mm, EW 1.10-1.12 mm, AL 0.74-0.75 mm, AW 1.04-1.09 mm.

Distribution.

Southwestern China: Chongqing.

Host ant.

Aphaenogaster sp.

Biology.

All adults were collected from ant colonies nested on the ground under stones (Fig. 13).

Etymology.

The specific epithet refers to the type locality of the new species, the Simianshan Nature Reserve.