Oxyporus (Oxyporus) tuantianius, Li & Wang & Li & Li & Wu, 2019

Li, Guo-Feng, Wang, Chun-Mei, Li, Hua-Feng, Li, Zhu-Jie & Wu, Xing-Xing, 2019, A new species of the genus Oxyporus Fabricius (Coleoptera: Staphylinidae: Oxyporinae) in Yunnan Province, China, Zootaxa 4551 (2), pp. 231-236 : 232-234

Oxyporus (Oxyporus) tuantianius sp. nov.

( Figs. 1 A–D, Figs. 2 A–E)

Type material. Holotype: CHINA: Yunnan Prov.: ♂, Xinping County, Tuan tian village , alt. 1857m, 23°36′N, 101°17′E, 17–24-August-2018, Li Guo-feng leg.. Paratypes: CHINA: Yunnan Prov.:, 2 ♀♀, same data as the Holotype ( YFTC) .

Description. BL: 8.84 mm, FBL: 4.82 mm, ML: 1.48 mm, HL: 1.42 mm, HW: 2.05 mm, TL: 0.81 mm, AL: 1.50 mm, LW: 0.81 mm, PL: 1.52 mm, PW: 1.87 mm, ELL: 2.05 mm, ELW: 2.62 mm, EYL: 0.65 mm. Body moderately stout, surface almost smooth and glossy. Color orange yellow, with mandibles, head, pronotum, scutellum, abdomen (except sides of segments 3–5) black, elytra bearing subtriangular black marking at outer apical angle extending from the posterior 4/5 of lateral margin to middle of posterior margin. ( Figs. 1 A–B).

Male: Head oval, wider than long (ratio 1.44), broader than pronotum (ratio 1.10), slightly narrowed posteriad behind eyes, posterior angles obtuse. Mandibles slightly longer than head (ratio 1.04), 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 1.25). Frons broadly, shallowly bi-impressed between antennal insertions; Antennae slightly longer than head (ratio 1.06); 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 0.26: 0.12: 0.13: 0.12: 0.11: 0.12: 0.12: 0.11: 0.11: 0.11: 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 1.25).

Pronotum subtrapezoid, distinctively transverse, wider than long (ratio 1.23), shorter (ratio 0.74) and narrower (ratio 0.71) than elytra, lateral margins sinuate in the middle and arcuately narrowed posteriad, widest at basal portion; disc almost impunctate, devoid of microsculpture, and each lateral side with 1 fovea in the middle; 6 setiferous punctures at anterior margin, 2 at posterior margin, and 2 at each lateral margin. Scutellum impunctate, rounded at apex, surface almost smooth.

Elytra wider than long (ratio 1.28), strongly widened apicad; each elytron with 1 row of evenly spaced small punctures along suture, 2 longitudinal rows of coarse variably spaced punctures medially, 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 3–6 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 slightly and broadly emarginated at middle, posterior margins of sternites 8 arcuately produced. ( Fig. 1C )

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

Female: Similar to male, but pronotum subhexagonal and arcuate at sides, widest at anterior 2/3; posterior margin nearly straight in sternite 7; posterior margin of sternite 8 strongly and arcuately produced. ( Fig. 1D )

Remarks. Oxyporus tuantianius n. sp. is readily distinguished from all other congeners previously recorded from China (40) and the 13 species recorded from Hunnan Province: O. altus Huang, Li et al, 2006 ( China: Xizang, Sichuan), O. altus yangae Zheng, 2010 ( China: Sichuan), O. angustatus Zheng, 2010 ( China: Sichuan) O. angusticeps Bernhauer, 1938 ( China: Chinkiang, Japan), O. atratulus Zheng, 2010 ( China: Sichuan), O. aureomarginatus Zheng, 2010 ( China: Sichuan), O. bambusicolus Zheng, 1997 ( China: Sichuan), O. basiventris Jarrige, 1948 ( China: Heilongjiang, Japan), O. beichuanus Zheng, 2010 ( China: Sichuan), O. bifasciarius Zheng, 2010 ( China: Yunnan), O. bingshengae Li, Wang et al, 2015 ( China: Yunnan), O. chenpengi Li, 1992 ( China: Jilin), O. erlangshanus Zheng, 2010 ( China: Sichuan), O. femoratus Zheng, 2010 ( China: Yunnan), O. fengtianae Li, Wang et al, 2018 ( China: Yunnan), O. formosanus Adachi, 1939 ( China: Taiwan), O. fungalis Zheng, 1992 ( China: Sichuan), O. germanus Sharp, 1889 ( China: Yunnan, Heilongjiang, Japan, Korea), O. hailuogou Zheng, 2010 ( China: Sichuan), O. humerocroceus Huang, Li et al, 2006 ( China: Sichuan), O. humerosus Zheng, 2010 ( China: Sichuan), O. itoi Hayashi, 1985 ( China: Taiwan), O. kunmingius Li, Wang et al, 2015 ( China: Yunnan), O. lii Zheng, 2011 ( China: Yunnan), O. liuae Zheng, 2010 ( China: Sichuan), O. loloshanus Hayashi, 1985 ( China: Taiwan), O. longipes Sharp, 1889 ( China: Heilongjiang, Japan, Korea), O. maculiventris Sharp, 1889 ( China: Heilongjiang, Japan), O. maxillosus Fabricius, 1793 ( China: Jilin, Finland, Sweden, Britain, Denmark, France, Germany, Switzerland, Austria, Italy, Syria, Russia, Japan, Mongolia), O. meigu Zheng, 2011 ( China: Sichuan), O. niger Sharp, 1889 ( China: Jilin, Japan, Korea), O. nigerrimus Hayashi, 1975 ( China: Taiwan), O. nigricollis Zheng, 1992 ( China: Sichuan), O. ningerius Li, Wang et al, 2018 ( China: Yunnan), O. procerus Kraatz, 1879 ( China: Heilongjiang, Russia), O. puerius Li, Zheng et al, 2011 ( China: Yunnan), O. riparius Zheng, 1997 ( China: Yunnan), O. rufus Linné, 1758 ( China: Jilin, Finland, Sweden, Britain, Denmark, France, Germany, Switzerland, Austria, Italy, Hungary, Czech, Slovakia, Poland, Romania, Georgia, Iran, Russia, Japan, Korea), O. shibatai Hayashi, 1975 ( China: Taiwan), O. sinicus Huang, Li et al, 2006 ( China: Zhejiang, Sichuan), O. taiwanus Hayashi, 1975 ( China: Taiwan), O. transversesulcatus Bernhauer, 1933 ( China: Sichuan), O. trisulcatus Bernhauer, 1943 ( China: Taiwan), O. wanglangus Zheng, 1992 ( China: Sichuan), O. yanae Zheng, 2011 ( China: Sichuan), O. yulong Zheng, 2011 ( China: Yunnan), but it is similar to O. kunmingius Li from Kunming City (Song hua-ba Village), Yunnan, China, in the color of the body, but can be distinguished from the latter by the following characters (see key below): Pronotum subtrapezoid and with 6 setiferous punctures at anterior margin, 2 at posterior margin, and 2 at each lateral margin; posterior margins of sternites 8 arcuately produced; median lobe slightly narrowed in base; right and left paramere without seta at each apex.

Etymology. The specific epithet is derived from the type locality “Tuantian”.

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

Figures

FIGURE 1. Oxyporus tuantianius 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 tuantianius 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