Stenus songxiaobini, Yu, Yi-Ming, Tang, Liang & Yu, Wei-Dong, 2014

Yu, Yi-Ming, Tang, Liang & Yu, Wei-Dong, 2014, Three new species of the Stenuscirrus group (Coleoptera, Staphylinidae) from Jiangxi, South China, ZooKeys 442, pp. 73-84 : 75-79

Taxon classification Animalia Coleoptera Staphylinidae

Stenus songxiaobini sp. n. Figs 5, 6, 28-37

Type material.

Holotype:CHINA: Jiangxi Prov.: ♂, Pingxiang City, Wugong Shan National Park, alt. 1340-1400 m, 19.VII. 2013, Song, Yin & Yu leg. (SHNU). Paratypes:CHINA: Jiangxi Prov.: 1♂, 1♀, same data, but alt. 1000-1350 m, 20.VII.2013 (SHNU).

Description.

BL: 4.3-4.7 mm, FL: 2.0-2.1 mm.

HW: 0.82-0.83 mm, PL: 0.62-0.67 mm, PW: 0.63-0.64 mm, EL: 0.74-0.78 mm, EW: 0.73-0.76 mm, SL: 0.52-0.57 mm.

The new species is similar to Stenus mingyueshanus sp. n. in most respects, but different in the following characters: head 1.08-1.12 times as wide as elytra; frons with interstices smooth, varying from narrower to slightly broader than half the diameter of punctures; relative length of antennal segments from base to apex as 9.5: 7.0: 18.5: 10.5: 8.5: 8.0: 6.5: 4.0: 6.0: 6.0: 7.0.

Pronotum 1.08-1.13 times as long as wide; median longitudinal furrow shallow of about 2/5 the length of pronotum, punctures round and partly confluent, variable in size, diameter of large punctures slightly larger than middle of 2nd antennal segment in cross section; interstices smooth, distinctly narrower than half the diameter of punctures.

Elytra 1.02-1.03 times as long as wide; size of punctures similar to those of pronotum, interstices partly with faint reticulation, somewhat narrower than half the diameter of punctures.

Hind tarsi 0.77-0.80 times as long as hind tibiae.

Male. Sternite VII with shallow emargination in the middle of posterior margin, sternite VIII (Fig. 28) with a circular emargination in the middle of posterior margin; sternite IX (Fig. 29) with long and acute apicolateral projections, posterior margin serrate and nearly straight; tergite X (Fig. 30) with posterior margin broadly rounded. Aedeagus (Figs 31, 32) with median lobe subparallel-sided in basal portion and broadening in apical half, apical margin truncate with a median projection, explusion hooks (Fig. 34) large, strongly sclerotized; parameres almost straight, extending a little beyond apex of median lobe, each with about 5 setae on apico-internal margin (Fig. 33).

Female. Sternite VIII (Fig. 35) with convex posterior margin; tergite X (Fig. 36) with posterior margin convex; spermatheca unsclerotized (Fig. 37).

Distribution.

Jiangxi Province: Wugong Shan (China).

Diagnoses.

Stenus songxiaobini is similar to Stenus mingyueshanus sp. n., but may be distinguished from the latter by denser and deeper punctures on the pronotum and elytra and by the shallower median longitudinal furrow, which is about 2/5 the length of pronotum.

Etymology.

This species is named in honor of Mr. Xiao-Bin Song, collector of the new species.