Miobdelus wangi He and Zhou, 2018

He, Liang & Zhou, Hong-Zhang, 2018, Taxonomy of the genus Miobdelus Sharp, 1889 (Coleoptera: Staphylinidae: Staphylinini) and five new species from China, Zootaxa 4377 (3), pp. 301-353 : 309-312

2. Miobdelus wangi He and Zhou , sp. nov.

( Figs. 2-1, 2-2 )

Type locality: CHINA, Sichuan Province, Yajiang County.

Type material. Holotype male, CHINA: Sichuan Province, Yajiang County, 3400 m, mixed broadleafconifer forest, pitfall traps, 15–18.VII.2001, coll. Xiaodong Yu & Hongzhang Zhou ( IZ-CAS). Paratypes: CHINA: Sichuan Province: 4 males, 3 females, same data as holotype (IZ-CAS).

Measurements. Body length: 13.7–16.9 mm. CL: 0.72; EL: 2.37; ELS: 1.01; EW: 2.72; HL: 2.18; HW: 2.40; PO: 0.99; PL: 2.68; PW: 2.24.

Description. Medium sized species. Body relatively elongate, totally black; head and pronotum with slight brassy sheen; elytra paler, dark reddish-brown, with small patches of brownish tomentose patches on humeral angles and middle of lateral sides; maxillary and labial palpi black to dark brunneous; antennae dark brunneous, with apical segments vaguely paler; legs brownish black, with tibia and tarsus covered with dense brownish pubescence; pubescence of dorsal side of head, pronotum and abdominal tergites brownish black, and that of elytra somewhat paler.

Head of rounded quadrangular shape, with slightly curved lateral sides and obtusely rounded posterior angles, slightly wider than long (ratio 1.10); eyes relatively smaller than most congeners and slightly protruding, shorter than tempora (ratio 0.73) in dorsal view; punctation and pubescence on dorsal surface of head dense, punctation robust, gradually becoming sparser toward clypeus, with shiny interspaces; interspaces without microsculpture; head disc with about five large pit-like punctures on each side of epicranial line. Y-shaped epicranial line clearly present on head disc. Antennae moderately long, segment 3 about as long as segment 2 (ratio 1.06), segments 4 to 7 slightly longer than wide to about as long as wide, segments 8 to 10 distinctly wider than long, last segment slightly narrower than segment 10. Pronotum longer than wide (ratio 1.20), with almost parallel lateral sides and widely rounded posterior angles, slightly narrowed posteriad from posterior third; narrow marginal groove disappearing downwards at posterior fourth of pronotal length; impunctate midline distinctly and entirely present; punctation and pubescence on disc about same as that on dorsal surface of head, interspace without microsculpture. Scutellum finely punctate and setose on entire surface, almost totally black, with some yellowish pubescence on basal part.

Elytra relatively short, slightly dilated posteriad; elytral length shorter than pronotum along midline, with a ratio of 0.38 along suture and a ratio of 0.88 along sides; elytral punctation fine and dense, granulose; pubescence black or dark reddish-brown, with patches of dark brownish tomentose pubescence on humeral angles and about poster third of lateral sides. Wings markedly reduced. Abdomen with pale apical seam of palisade setae. Abdominal tergite 2 punctate and pubescent on entire surface; all visible abdominal tergites finely and densely punctate and pubescent; visible tergites 1 to 3 each with a pair of black tomentose patches; visible tergite 4 with a pair of golden yellowish tomentose patches, surrounded by patches of black tomentose pubescence on lateral sides; visible tergite 5 with a pair of tomentose patches similar with that on visible tergite 4, but markedly smaller and darker.

Male. Abdominal sternite 8 with wide and shallow medioapical emargination. Sternite 9 relatively long; apical margin widely rounded, with markedly shallow emargination; tapered basal portion markedly elongate ( Fig. 2-2 G ). Tergite 10 shaped as in Fig. 2-2 D , with subacuate apex, sparsely setose. Aedeagus shaped as in Figs. 2-1 B, C, 2-2 A–C , median lobe triangular, constricted subapically, with rounded but narrow apex; apical portion of paramere elongate, shaped as in Figs. 2-1 D, 2-2 E , with sensory peg setae arranged along lateral sides, not numerous.

Female. Second gonocoxite and tergite 10 shaped as in Figs. 2-1 E, 2-2 F, H .

Distribution. Miobdelus wangi He and Zhou , sp. nov. is at present known only from the type locality in western Sichuan Province.

Notes. Miobdelus wangi He and Zhou , sp. nov. can be easily distinguished from other congeners by the uniquely shaped aedeagus, the patterns of tomentose pubescence on elytra and abdominal tergites (other species have the pubescence on these parts in different patterns), and relatively small eyes.

Etymology. The species is named in honor of Dr. Chengbin Wang, a previous colleague from our research team, for his generous help with this study and other studies of the subtribe Staphylinina .

Figures

FIGURE 1-2. Miobdelus wolongensis He and Zhou, sp. nov.: A and C. aedeagus, lateral view; B. aedeagus, ventral view; D. male tergite 10; E. underside of apical portion of paramere; F. female tergite 10; G. male sternite 9; H. second gonocoxite of female genital segment (scale bars = 0.20 mm).