Gabrius batangensis, Li, Liang, Schillhammer, Harald & Zhou, Hong-Zhang, 2010

Li, Liang, Schillhammer, Harald & Zhou, Hong-Zhang, 2010, Fourteen new species of the genus Gabrius Stephens, 1829 (Coleoptera: Staphylinidae: Philonthina) from China, Zootaxa 2572, pp. 1-24 : 3

1. Gabrius batangensis sp. n.

( Figs. 1 I–L)

Type material. Holotype: CHINA: Sichuan: ɗ, Batang, 3512 m, 6.VI.2009, leg. Zhou Yulingzi (IZ-CAS). Paratypes: CHINA: Sichuan: 7 ΨΨ, same data as holotype, but 3440–3512 m, 4–6.VI.2009 (IZ-CAS).

Description. Head and pronotum black, shining. Antennae and elytra black. Abdomen black with feebly blue reflex. Mandibles dark brown. Maxillary and labial palpi reddish-brown. Legs black-brown.

Body 7.83–8.40 mm long (HPL = 2.37–2.61 mm). Head of rounded quadrangular shape, 1.06–1.22 mm long, 0.73–0.90 mm wide (HW:HL = 0.64–0.85). Tempora 0.41–0.49 mm long, almost evenly rounded, sparsely and coarsely punctate; eyes small, slightly protruding, 0.25–0.33 mm long, 0.50–0.67 times as long as tempora. Dorsal surface of head with scattered, large setiferous punctures along lateral sides, vertex largely impunctate; entire head with distinct and profound microsculpture of mesh. Antennae moderately long, 1st segment long, slightly thickened towards apex, 3rd segment distinctly longer than 2nd, 4th–6th segments distinctly longer than wide, 7th segment almost as long as wide, 8th–10th segments slightly transverse, last segment distinctly longer than wide, obliquely truncated.

Pronotum almost parallel-sided, 1.14–1.31 mm long, 0.90–1.06 mm wide, slightly wider than head (PW:HW = 1.09–1.30); dorsal rows each with six punctures, sublateral rows each with two punctures; entire surface with distinct and profound microsculpture of transverse waves.

Elytra 1.55–1.63 mm long, 1.47–1.55 mm wide, along sides 1.25–1.36 times as long as pronotum; densely and finely punctate, punctures separated by 1–2 times their diameter. Scutellum large, triangular, densely and finely punctate and pubescent.

Abdomen slightly narrowed posteriad, widest 1.39–1.47 mm, densely and finely punctate, punctures separated by 1–2 times their diameter at base, gradually becoming sparser toward apex of each tergite; surface between punctures with exceedingly fine and dense microsculpture of transverse striae; tergites III–VI with two basal lines, elevated area between basal lines almost impunctate.

Male. Sternite VIII with moderately wide, deep medio-apical emargination partly filled by semimembranous extension. Genital segment with styli of tergite IX simple, moderately setose apically. Sternite IX with large membranous middle portion, basal portion narrow, long, almost symmetrical, apical portion split apically into two pubescent lobes. Tergite X widely emarginate at apex.

Aedeagus large; median lobe moderately long, distinctly exceeding paramere, apical portion of median lobe narrow and slightly asymmetrical ( Figs. 1 I, L); in lateral view, median lobe with arcuate subapical portion and subacuate apex ( Fig. 1 J); branches of paramere widely separated from each other, face adjacent to median lobe with seven sensory peg setae, each three or four closely arranged along base of lateral margin respectively ( Fig. 1 K).

Female. Sternite VIII subrounded at apex, without medio-apical emargination. Genital segment with styli of tergite IX similar to that of male. Tergite X very narrow, triangular, conically narrowed toward subacuate apex, with two long apical setae.

Remarks. The new species is closely related to G. yaanensis sp. n.. Gabrius batangensis sp. n. differs from G. yaanensis sp. n. by the distinctly narrower apical portion of median lobe of aedeagus, much longer branches of paramere and the different arrangement of peg setae on the underside of the paramere.

Distribution. The species is at present known only from China (Sichuan).

Etymology. The species name refers to the name of the type locality, Batang.

Figures

FIGURE 1. Gabrius tortilis sp. n. A, aedeagus, ventral view; B, median lobe of aedeagus (paramere removed), lateral view; C, underside of paramere; D, apical portion of median lobe, ventral view. Gabrius yaanensis sp. n. E, aedeagus, ventral view; F, median lobe of aedeagus (paramere removed), lateral view; G, underside of paramere; H, apical portion of median lobe, ventral view. Gabrius batangensis sp. n. I, aedeagus, ventral view; J, median lobe of aedeagus (paramere removed), lateral view; K, underside of paramere; L, apical portion of median lobe, ventral view. Scale bars 0.5 mm.