Oxyporus (Oxyporus) ningerius, Li & Li & Wang & Li & Ze, 2018

Li, Guo-Feng, Li, Hong-Wei, Wang, Chun-Mei, Li, Hua-Feng & Ze, Sang-Zi, 2018, Two new species of the genus Oxyporus Fabricius (Coleoptera: Staphylinidae: Oxyporinae) in Yunnan Province, China, Zootaxa 4369 (1), pp. 93-100 : 97-98

Oxyporus (Oxyporus) ningerius sp. nov.

( Figs. 3A–B )

Type material. Holotype: CHINA: Yunnan Prov.: ♀, Ninger county, Ma lu-tang village, alt. 1485m, 23°07′N, 101°03′E, 10–26-July-2017, Li Guo-feng leg. ( YFTC) . Paratypes: CHINA: Yunnan Prov.: 3♀♀, same data as the Holotype ( YFTC).

Description. BL: 9.19 mm, FBL: 4.58 mm, ML: 1.30 mm, HL: 1.36 mm, HW: 1.74 mm, TL: 0.76 mm, AL: 1.55 mm, LW: 0.73 mm, PL: 1.32 mm, PW: 1.68 mm, ELL: 2.10 mm, ELW: 2.31 mm, EYL: 0.59 mm. Body moderately stout, surface almost smooth and glossy. Color orange yellow, with mandibles, eyes, scutellum, gula, sternum black; head and pronotum, bearing black mid-longitudinal fascia; each elytron with a small black fascia along suture and larger black marking at outer apical angle extending from 1/2 of lateral margin to middle of posterior margin, connected to each other by black fascia at posterior margin; abdominal tergites 3–7 with 2 slightly broad longitudinal black fasciae, abdominal tergite 8with 2 vague black longitudinal markings. ( Fig. 3A ).

Female: Head oval, wider than long (ratio 1.28), slightly broader than pronotum (ratio 1.04) and longer than pronotum (ratio 1.03), gently narrowed posterad behind eyes. Mandibles slightly shorter than head (ratio 0.96), 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 1.24). Frons broadly, shallowly bi-impressed between antennal insertions. Antennae longer than head (ratio 1.14); 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 0.27: 0.12: 0.14: 0.12: 0.11: 0.12: 0.13: 0.12: 0.14: 0.13: 0.20. Eyes large and convex. Vertex nearly smooth, two setiferous punctures near inner margin of eye, one anterior and one posterior. Temples longer than eyes seen from above (ratio 1.29).

Pronotum subhexagonal, transverse, wider than long (ratio 1.27), shorter (ratio 0.63) and narrower (ratio 0.72) than elytra, and arcuate at sides, widest at anterior 2/3; disc almost impunctate, devoid of microsculpture, with one transverse depression located just before middle, which is widened to both sides, and additionally, surface bearing 2 distinctive longitudinal depressions in middle just behind the transverse depression, which do not reach to posterior margin, and each side with 1 fovea in the middle; 8 setiferous punctures at anterior margin, 4 at each lateral margin and 2 at posterior margin. Scutellum impunctate, rounded at apex, surface almost smooth.

Elytra wider than long (ratio 1.10), slightly widened apicad; each elytron with a row of evenly spaced small punctures along suture, two 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 dorsad. Hind wings developed.

Abdomen gradually narrowed apicad; tergites 3–4 each with a pair of small pruinose spots in the 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 margin of sternite 8 arcuately produced. ( Fig. 3B )

Male: Unknown.

Remarks. Oxyporus ningerius n. sp. is one of the most distinctive species of the Oxyporus from Yunnan Province. It can be easily recognized by unique body color, in particularly abdominal tergites 3–7 with two slightly broad black longitudinal fasciae. It is similar to O. bifasciarius Zheng, 2010 from Dali Prefecture (Mountain Jizu of Binchuan County), Yunnan, Province China, in the characteristic of the abdominal tergites, but can be distinguished from the latter by the following characters: body length 9.19 mm; the color of head and pronotum is orange yellow but bearing black mid-longitudinal fascia; posterior margin of sternite 8 arcuately produced.

Etymology. The specific epithet is derived from the county of the type locality, “Ninger.”.

Habitat and Distribution. The new species was found under pileus of gilled mushrooms in Armillaria tabescens Scop, 1921 (Fungi: Basidiomycota: Agaricomycotina: Agaricomycetes: Agaricomycetidae : Agaricales : Physalacriaceae ). It is at present only known from the type locality in eastern Yunnan Province, China.

Figures

FIGURE 3. Oxyporus ningerius sp. nov. A. female habitus (2.00mm), dorsal view. B. female sternite 8 (0.50mm). (Scale lengths in parentheses)