Gabrius zhaoi, 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 : 21-23

14. Gabrius zhaoi sp. n.

( Figs. 8 A–J)

Type material. Holotype: CHINA: Ningxia: ɗ, Liupanshan, 22.VI.2008, 2050 m, leg. Zhao Zongyi & Zhou Haisheng (IZ-CAS). Paratypes: CHINA: Ningxia: 3ΨΨ, same data as holotype (IZ-CAS).

Description. Head and pronotum black, shining. Antennae black with last segment sometimes dark brown. Elytra black or black-brown. Abdomen black with blue reflex. Mandibles dark brown. Maxillary and labial palpi reddish-brown. Legs dark brown.

Body 7.34–7.67 mm long (HPL = 2.28–2.45 mm). Head of rounded quadrangular shape, 1.06 mm long, 0.98 mm wide (HW:HL = 0.92). Tempora 0.41 mm long, almost evenly rounded, sparsely and coarsely punctate; eyes small, slightly protruding, 0.25–0.33 mm long, 0.60–0.80 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–8th segments distinctly longer than wide, 9th– 10th segments almost as long as wide, last segment distinctly longer than wide, obliquely truncated.

Pronotum almost parallel-sided, 1.14–1.31 mm long, 0.90–0.98 mm wide, almost as wide as head (PW:HW = 0.92–1.00); dorsal rows each with six punctures, sublateral rows each with two punctures; entire surface with distinct and profound microsculpture of transverse waves.

Elytra 1.47 mm long, 1.55 mm wide, along sides 1.38–1.46 times as long as pronotum, densely and finely punctate, punctures separated by 2–3 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 2–3 times their diameter at base, gradually becoming slightly 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. Tergite VIII subarcuate at apex ( Fig. 8 J). Sternite VIII with moderately wide, deep medio-apical emargination, partly filled by semi-membranous extension ( Fig. 8 F). Genital segment with styli of tergite IX simple, moderately setose apically. Sternite IX with large membranous middle portion, basal portion narrow and long, almost symmetrical, apical portion split apically into two pubescent lobes ( Fig. 8 E). Tergite X simple, subtriangular, deeply bilobed at apex, each lobe bearing one apical seta ( Fig. 8 G).

Aedeagus large; median lobe moderately long, distinctly exceeding paramere, apical portion asymmetrical, narrowed into sub-acuate apex ( Figs. 8 A, C); paramere slender, with apical portion divided into two narrow branches, each branch bearing a strong seta apically, face adjacent to median lobe with sensory peg setae closely arranged along medio-apical margin ( Fig. 8 D).

Female. Sternite VIII subrounded at apex, without medio-apical emargination ( Fig. 8 I). Genital segment with styli of tergite IX similar to that of male. Tergite X narrow, triangular, bilobed at apex ( Fig. 8 H).

Remarks. The new species is closely related to G. japonicus Shibata, 1991 . Gabrius zhaoi sp. n. differs from the latter species by the paramere with lobes narrowly separated from each other, each lobe of paramere bearing a strong apical seta and distinctly less peg setae on the underside of paramere (paramere with lobes widely separated from each other and lacking strong apical setae apically in G. japonicus ).

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

Etymology. The species is named in honor of the collector Dr. Zhao Zongyi (Institute of Zoology, Chinese Academy of Sciences, Beijing, China).

Figures

FIGURE 8. Gabrius zhaoi sp. n. A, aedeagus, ventral view; B, median lobe of aedeagus (paramere removed), lateral view; C, apical portion of median lobe, ventral view; D, underside of paramere; E, sternite IX of male; F, sternite VIII of male; G, tergite X of male; H, tergite X of female; I, sternite VIII of female; J, tergite VIII of male. Gabrius japonicus Shibata K, apical portion of median lobe, ventral view. Scale bars 0.5 mm.