Batrisodes qiului, 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 : 16-17

Batrisodes qiului sp. n. Fig. 4

Type material

(1 ex.). Holotype: CHINA: ♂, labeled 'China: Sichuan, Luzhou City, Gulin County (古蔺县), Honglong Lake (红龙湖), 28°07'17"N, 105°46'53"E, 1620 m, 30.iv.2017, ant nest in rotten wood, Lu Qiu leg.' (SNUC)

Diagnosis of male.

The new species can be easily separated from other Batrisodes species in China by the following combination of characters: moniliform antennomeres, antennomeres XI with a large projection at the base, mesotrochanter with an abrupt projection at the ventral margin, mesofemur with a small spine at middle, and simple, slender aedeagus distinctly expanded at the apex.

Description.

Male. (Fig. 4A), Body reddish brown, BL 3.05 mm. Head slight wider than long, near rectangular, rough and covered with short hair, HL 0.60 mm, HW 0.66 mm, with small but obvious vertexal foveae, antennal tubercles prominent; area between moderately raised antennal tubercles concave; clypeus slightly punctate, with round anterior margin; lateral longitudinal carinae unobvious, lacking median vertexal carina. Each eye composed of about 60 facets. Antennomeres II–XI moniliform, XI (Fig. 4B) largest, with distinct, apically-truncate basal denticle. Pronotum nearly as long as wide, PL 0.65 mm, PW 0.64 mm, disc slightly convex; with distinct median antebasal foveae, lateral longitudinal sulci present; lateral antebasal fovea distinct; outer and inner basolateral foveae small and not distinct. Elytra wider than long, EL 0.93 mm, EW 1.07 mm; each elytron with three small but distinct basal foveae, discal striae shallow and short. Mesotrochanter (Fig. 4C) with abrupt projection at ventral margin; mesofemora (Fig. 4C) with short but distinct ventral spine at basal 2/5; mesotibiae (Fig. 4D) slightly expanded at basal 1/3, with small apical spine; metatibiae (Fig. 4E) with long apical tuft of setae. Abdomen wider than long, AL 0.87 mm, AW 1.05 mm; tergite IV (first visible tergite) longest, approximately twice as long as next, with obvious oblique marginal carinae; tergite V–VI with obvious oblique marginal carinae. Aedeagus (Fig. 4 F–G) slender, length 0.45 mm; median lobe simple, flattened and symmetrical, expanded at the apex.

Female. Unknown.

Distribution.

Southwestern China: Sichuan.

Host ant.

Pheidole sp.

Biology.

All adults were collected from an ant nest in rotten wood.

Etymology.

The specific epithet is dedicated to our friend Lu Qiu, who collected this new species and sent the material to us for study.