Oxyporus (Oxyporus) mojiangius Li, 2020

Li, Guo-Feng, 2020, A new species of the genus Oxyporus Fabricius (Coleoptera: Staphylinidae Oxyporinae) in Yunnan Province, China, Zootaxa 4786 (1), pp. 145-150 : 146-148

Oxyporus (Oxyporus) mojiangius Li , sp. nov.

( Figs. 1 A–D, Figs. 2 A–E)

Type material. Holotype: CHINA: Yunnan Prov.: ♂, Mojiang County, Xinfu village , alt. 1721m, 23°34′N, 101°15′E, 2–6-September-2018, Li Guo-feng leg. Paratypes: CHINA: Yunnan Prov.: 1♂, 3♀♀, same data as the Holotype ( YFTC) .

Description. BL: 10.52 mm, FBL: 5.97 mm, ML: 1.77mm, HL: 1.87 mm, HW: 2.65 mm, TL: 1.02 mm, AL: 1.65 mm, LW: 0.86 mm, PL: 1.80 mm, PW: 2.31 mm, ELL: 2.50 mm, ELW: 2.95 mm, EYL: 0.73 mm. Body moderately stout, surface almost smooth and glossy. Color orange yellow, with mandibles, head, pronotum, scutellum, abdomen (except sides of segments 3–6 and basal portion of segment 8) black, and elytra bearing subtriangular black marking at outer apical angle extending from 4/5 of lateral margin to middle of posterior margin and meeting with each other by narrow black fascia near posterior margin. ( Figs. 1 A–B).

Male: Head suboval, wider than long (ratio 1.42), broader than pronotum (ratio 1.15), slightly widened posteriad behind eyes, posterior angles obtuse. Mandibles slightly shorter than head (ratio 0.95), moderately broad, inner edges evenly curved to acute apices. Labrum broadly and deeply emarginate at middle. Clypeus broadly and shallowly emarginate at middle. Maxillary palpi with first segment shortest, second longer than third, third slightly wider than last and almost equal in length, and apical segment of labial palpi wider than length of an eye (ratio 1.18). Frons broadly, shallowly bi-impressed between antennal insertions; Antennae slightly shorter than head (ratio 0.88); segments 1–4 elongate, 5–10 transverse, slightly asymmetrical and flattened, apical segment narrower than preceding segment, each segment with long setae near apex, and segments 5–10 glabrous medially and covered with fine setae laterally, the relative length of segments from base to apex as 0.31: 0.14: 0.15: 0.16: 0.14: 0.15: 0.13: 0.14: 0.14: 0.13: 0.18. Eyes large and convex. Vertex nearly smooth, two setiferous punctures near inner margin of eye, one anteriad and one posteriad. Temples longer than eyes seen from above (ratio 1.40).

Pronotum subquadrate, slightly transverse, wider than long (ratio 1.28), shorter (ratio 0.72) and narrower (ratio 0.78) than elytra, lateral margins bisinuate at anterior 1/3 and in the middle and subarcuately narrowed posteriad, widest at about anterior 3/5; disc almost impunctate, devoid of microsculpture, with 1 deep, transverse depression located just before middle, which is widened to both sides, and additionaly, surface bearing 2 vague longitudinal depressiions in middle just behind the transverse depression, which does not reach to posterior margin, and each lateral side with 2 fovea at anterior 1/3 and in the middle; 8 setiferous punctures bearing at anterior margin, 2 ones at posterior margin and 4 ones at each lateral margin. Scutellum impunctate, rounded at apex, surface almost smooth.

Elytra wider than long (ratio 1.18), slightly widened apicad; each elytron with 1 row of evenly spaced small punctures along suture, 2 longitudinal rows of coarse variably spaced punctures medially, and several, scattered coarse punctures to either side of rows; apical, lateral, and posterior margins bearing a few short setae; humeri produced forward and convex above. Hind Wings well developed.

Abdomen with tergites 3–4 each with a pair of pruinose spots at middle and tergites 3–7 each with 1–2 irregular setiferous punctures along lateral margin; punctation of tergites very sparse and vague, surface between punctures with exceedingly fine and dense microsculpture of transverse striae; posterior margins of sternites 7–8 very slightly and broadly emarginated at middle. ( Fig. 1C )

Aedeagus slightly asymmetrical and moderately sclerotized; median lobe somewhat widened apicad and slightly narrowed in middle, with apical margin rounded; parameres relatively long and slender, gradually narrowed apicad, ( Figs. 2 A–C); the right lobe and the left one with two minute setae at each apex. ( Figs. 2 D–E)

Female: Similar to male, but head smaller and oval; mandibles slightly shorter; pronotum subhexagonal and arcuate at sides, each lateral side with 1 fovea in the middle; posterior margin of sternite 8 arcuately produced. ( Fig. 1D )

Remarks. Oxyporus mojiangius is similar to O. wangae Li from Mojiang County, Yunnan, China, in the color of the body, but can be distinguished from the latter by the following characters (see key below): abdomen (except sides of segments 3–6 and basal portion of segment 8) black; posterior margins of sternites 7–8 very slightly and broadly emarginated at middle; right and left paramere with two minute setae at each apex.

Etymology. The specific epithet is derived from the type locality “Mojiang”. Habitat and Distribution. The new species was found under piles of Amanita hemibapha Berk & Broome, 1887 (Fungi: Basidiomycota: Agaricomycotina: Agaricomycetes: Agaricom- ycetidae: Agaricales : Amanitaceae ) a gilled mushrooms. It is at present only known from the type locality in southwest Yunnan Province, China.

Figures

FIGURE 1. Oxyporus mojiangius sp. nov. A. male habitus, dorsal view. B. female habitus, dorsal view. C. male sternite 8. D. female sternite 8. Scale bars: as above

FIGURE 2. Oxyporus mojiangius sp. nov. A. ventral view of aedeagus. B. lateral view of aedeagus. C. dorsal view of aedeagus. D. apical portion of left paramere of aedeagus. E. apical portion of right paramere of aedeagus. Scale bars: as above