Oxyporus (Oxyporus) bingshengae, Li, Guo-Feng, Wang, Chun-Mei, Li, Hua-Feng & Hou, Yun-Ping, 2015

Li, Guo-Feng, Wang, Chun-Mei, Li, Hua-Feng & Hou, Yun-Ping, 2015, A new species of the genus Oxyporus Fabricius (Coleoptera: Staphylinidae: Oxyporinae) in Yunnan, China, Zootaxa 3986 (5), pp. 591-596 : 592-595

Oxyporus (Oxyporus) bingshengae sp. nov.

( Figs. 1 A–D, Figs. 2 A–E)

Type material. Holotype: CHINA:Yunnan Prov.: ♂, Mojiang County, Tuan tian village, alt. 1857m, 23°36′N, 101°17′E, 23–31-July-2013, Li Bing-sheng leg. Paratypes: CHINA: Yunnan Prov.: 4♂♂, 1♀, same data as the Holotype ( YFTC).

Description. BL: 8.14 mm, FBL: 4.21 mm, ML: 1.54 mm, HL: 1.32 mm, HW: 2.78 mm, TL: 0.81 mm, AL: 2.15 mm, LW: 1.13 mm, PL: 1.83 mm, PW: 2.20 mm, ELL: 2.62 mm, ELW: 3.40 mm, EYL: 0.84 mm. Body moderately stout, surface almost smooth and glossy. Color reddish yellow, with mandibles, abdominal tergites 6 (except lateralapical margins), 7, and 8 (only basal portion) black, anterior 1/2 of head bearing a black large suboval marking, anterior 1/2 of pronotum bearing a black small suquadrate macula, elytra bearing subtriangular black marking at outer apical angle extending from the posterior 4/5 of lateral margin to middle of posterior margin and forming narrow black fascia near posterior margin. ( Figs. 1 A–B).

Male: Head subquadrate, distinctively wider than long (ratio 2.11), broader than pronotum (ratio 1.26), strongly widened posteriad behind eyes, posterior angles obtuse. Mandibles longer than head (ratio 1.17), 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 1.35). Frons broadly, shallowly bi-impressed between antennal insertions; Antennae distinctively longer than head (ratio 1.63); 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 0.35: 0.13: 0.17: 0.16: 0.15: 0.18: 0.14: 0.15: 0.14: 0.15: 0.20. Eyes large and convex. Vertex nearly smooth, two setiferous punctures near inner margin of eye, one anteriad and one posteriad. Temples slightly shorter than eyes seen from above (ratio 0.96).

Pronotum subquadrate, slightly transverse, wider than long (ratio 1.20), shorter (ratio 0.70) and narrower (ratio 0.65) than elytra, lateral margins strongly bisinuate at anterior 1/3 and in the middle and subarcuately narrowed posteriad, widest at basal portion; disc almost impunctate, devoid of microsculpture, with 1 deep, transverse depression located in the middle, which is widened to both sides, and additionaly, surface bearing 2 deep, distinct longitudinal depressions in middle just behind the transverse depression, which does not reach to posterior margin, and each lateral side with 2 fovea at anterior 1/2 and in the middle; 8 setiferous punctures bearing at anterior margin, 2 ones at posterior margin and 3 ones at each lateral margin. Scutellum impunctate, rounded at apex, surface almost smooth.

Elytra wider than long (ratio 1.30), strongly 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 developed.

Abdomen with tergites 3–4 each with a pair of pruinose spots at middle and tergites 5 with 2 small irregular black spot at middle and left 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. 1 C)

Aedeagus slightly asymmetrical and moderately sclerotized; median lobe somewhat widened apicad, with apical margin rounded, twisted to right; parameres relatively long and slender, gradually narrowed apicad, ( Figs. 2 A–C); the left lobe longer than right one, the former with one minute seta and the latter without seta at each apex. ( Figs. 2 D–E).

Female: Similar to male, but body smaller and color orange yellow; head less transverse; mandibles slightly shorter; posterior margin nearly straight in sternite 7; posterior margin of sternite 8 arcuately produced. ( Fig. 1 D)

Remarks. Oxyporus bingshengae n. sp. is similar to O. puerius Li from Puer City (Lianhua Village), Yunnan, China, in the color of the body, but can be distinguished from the latter by the following characters (see key below): Anterior 1/2 of head bearing a black large suboval marking; abdominal tergites 6 (except lateral-apical margins)black; pronotum lateral margins strongly bisinuate at anterior 1/3 and in the middle; elytra bearing subtriangular black marking at outer apical angle extending from the posterior 4/5 of lateral margin to middle of posterior margin and forming narrow black fascia near posterior margin; the left lobe longer than right one, the former with one minute seta and the latter without seta at each apex.

Etymology. The specific epithet is warmly dedicated to the collector of the type specimen, Bing-Sheng Li, Li’s dear father, to celebrate his coming 72th birthday.

Habitat and distribution. The new species was found in fungi. It is at present only known from the type locality in southwest Yunnan, China.

Key to the species of Oxyporus of Yunnan

1 Body entirely black; known from Baoshan ................................................................................... O. femoratus Zheng

- Body bicolor ................................................................................................................................................................. 2

2 Head black to brownish black....................................................................................................................................... 3

- Head yellow to reddish yellow ..................................................................................................................................... 7

3 Maximum length more than 9 mm; known from Lijiang ................................................................ O. germanus Sharp

- Maximum length no more than 9 mm ..........................................................................................................................4

4 Abdomen brownish yellow, with two longitudinal black fasciae on tergites 3–7; known from Binchuan .................... ..........................................................................................................................................................bifasciarius Zheng

- Abdomen without black longitudinal fasciae ............................................................................................................... 5

5 Abdominal tergites 3–4 or 3–5 yellow to reddish yellow; known from Dali .................................... O. riparius Zheng

- Abdominal tergites 3–4 or 3–5 black........................................................................................................................... 6

6 Elytra with black area in basal part of suture; pronotal disc bearing 2 vague longitudinal depressiions in middle just behind the transverse depression; know from Lijiang ................................................ O. transversesulcatus Bernhauer

- Elytra without black area in basal part of suture, pronotal disc bearing 3 vague longitudinal depressiions in middle just behind the transverse depression; known from Kunming ........................................................... O. kunmingius Li

7 Abdominal segments 3–5 black; known from Lijiang......................................................................... O. yulong Zheng

- Abdominal segments 3–5 brownish yellow to reddish yellow ..................................................................................... 8

8 Posterior portion of gula and metasternum brownish yellow; known from Puer....................................... O. lii Zheng

- Posterior portion of gula and metasternum reddish yellow .......................................................................................... 9

9 Pronotal anterior without macula, disc with 2 deep, transverse depressions before middle; known from Puer ............ .................................................................................................................................................................. O. puerius Li

- Pronotal anterior 1/2 bearing a black small suquadrate macula, disc with 1 deep, transverse depressions before mid- dle; known from Mojiang ................................................................................................... O. bingshengae sp. nov. Li

Figures

FIGURE 1. Oxyporus bingshengae 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 bingshengae 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.