Miobdelus chrysanthemoides 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 : 312-315

3. Miobdelus chrysanthemoides He and Zhou , sp. nov.

( Figs.3-1 , 3-2 )

Type locality: CHINA, Sichuan Province, Luding County, Moxi Town, Hailuogou.

Type material. Holotype male, CHINA: Sichuan Province, Luding County, Moxi Town, Hailuogou , 2775 m, pitfall traps, 16.V.2009, coll. Yulingzi Zhou ( IZ-CAS). Paratypes: CHINA: Sichuan Province: 2 females, same data as holotype (IZ-CAS).

Measurements. Body length: 12.4–15.4 mm. CL: 0.69; EL: 2.71; ELS: 1.48; EW: 2.75; HL: 1.95; HW: 2.19; PO: 0.88; PL: 2.35; PW: 1.97.

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

Head of rounded quadrangular shape, with obtusely rounded posterior angles, wider than long (ratio 1.12); eyes moderately large and slightly protruding, appreciably shorter than tempora (ratio 0.78) in dorsal view; punctation and pubescence on dorsal surface of head dense, punctation markedly robust, gradually becoming sparser toward clypeus, with shiny interspaces; pubescence markedly longer and denser than most congeners of Miobdelus ; interspaces without microsculpture; head disc with about five large pit-like punctures on each side of epicranial line. Anterior part of Y-shaped epicranial line clearly present on head disc, with basal part becoming slightly vaguer. Antennae moderately long, segment 3 about as long as segment 2 (ratio 1.02), segments 4 to 9 distinctly longer than wide, gradually becoming wider, segment 10 about as long as wide, last segment slightly narrower than segment 10. Pronotum distinctly longer than wide (ratio 1.19), with widely rounded posterior angles; anterior half slightly wider; narrow marginal groove disappearing downwards at posterior fourth of pronotal length; impunctate midline robust, distinctly and entirely present; punctation on pronotal disc about same as that on dorsal surface of head, slightly finer, interspace without microsculpture; pubescence moderately dense and long, much sparser and shorter than that on head disc. Scutellum finely punctate and setose on entire surface, totally black. Elytra moderately long, elytral length distinctly shorter (ratio 0.63) along suture but slightly longer (ratio 1.15) along sides than pronotum along midline, slightly dilated posteriad; elytral punctation fine and dense, granulose; pubescence dark reddish-brown, with patches of dark brownish tomentose on humeral angles and about middle of lateral sides. Wings fully developed. Abdomen without pale apical seam of palisade setae, but apical margin of visible tergites each with a pair of yellowish brown tomentose spots near later margins. Abdominal tergite 2 only punctate and pubescent along posterior margin; all visible abdominal tergites finely and densely punctate and pubescent; visible tergites 1 and 2 each with a pair of black tomentose patches; visible tergites 3 with a large patch of black tomentose pubescence in middle; visible tergite 4 with a large patch of golden yellowish tomentose pubescence; visible tergite 5 with a pair of small black tomentose patches, surrounded by some yellowish tomentose pubescence.

Male. Abdominal sternite 8 with moderately wide and relatively deep medioapical emargination. Sternite 9 moderately long, gradually narrowed from basal part to apical part; apical margin with markedly shallow emargination; tapered basal portion moderately long ( Fig. 3-2 G ). Tergite 10 shaped as in Fig. 3-2 D , sparsely setose. Aedeagus short and robust, with apical portion markedly short, shaped as in Figs. 3-1 B , C, 3-2 A–C ; paramere almost reaching apex of median lobe, shaped as in Figs. 3-1 D , 3-2 E , with sensory peg setae arranged along lateral sides, not numerous.

Female. Second gonocoxite and tergite 10 shaped as in Figs. 3-1 E, 3-2 F, H.

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

Notes. Miobdelus chrysanthemoides He and Zhou , sp. nov. can be quite easily distinguished from other species by the short and robust aedeagus and the long and dense yellowish pubescence on the dorsal head.

Etymology. The species epithet chrysanthemoides is composed of Greek stems chrys (golden, beautiful), anthem - (flower, as like chrysanthemums) and suffix – oides, to indicate the golden-haired mark on the head and abdomen.

Figures

FIGURE 3-1. Miobdelus chrysanthemoides He and Zhou, sp. nov.: A. habitus of species (2.0 mm); B. aedeagus, lateral view (0.2 mm); C. aedeagus, ventral view (0.2 mm); D. underside of apical portion of paramere (0.2 mm); E. second gonocoxite of female genital segment (0.2 mm). Scale in parentheses.

FIGURE3-2. Miobdelus chrysanthemoides 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).