Oxyporus (Oxyporus) jiangi, Yan & Li & Zheng, 2020

Yan, Xianghui, Li, Yujie & Zheng, Fake, 2020, Oxyporus (Oxyporus) jiangi sp. nov. and O. (O.) wenchuanus sp. nov. (Coleoptera: Staphylinidae) from Sichuan, China, Zoological Systematics 45 (2), pp. 126-134 : 128-130

publication ID	https://doi.org/ 10.11865/zs.202017
publication LSID	lsid:zoobank.org:pub:71667075-CA11-4E9E-92F7-35507F63AA12
DOI	https://doi.org/10.5281/zenodo.5459555
persistent identifier	https://treatment.plazi.org/id/752B9F75-FF83-5023-FF74-FDE7AB201A50
treatment provided by	Diego
scientific name	Oxyporus (Oxyporus) jiangi
status	sp. nov.

Treatment

Oxyporus (Oxyporus) jiangi sp. nov. ( Figs 2 – 8 View Figures 2–3 View Figures 4–8 , 14 – 15 View Figures 14–17 )

Diagnosis. The new species is similar to O. (O.) liuae Zheng from Sichuan Province (Zheng & Li, 2010), but can be distinguished from the following characters: (1) elytra without small black fascia in basal portion of suture; (2) abdominal tergies 5–7 forming large black marking; (3) all abdominal sternites black except 3–6 paratergites yellow; (4) sternite 8 of male almost truncate at posterior margin.

Description. Measurement. BL 9.4 mm, FBL 5.5 mm, ML 1.6 mm, HL 1.9 mm, HW 2.2 mm, TL 1.1 mm, AL 1.8 mm, LW 0.7 mm, PL 1.5 mm, PW 1.8 mm, ELL 2.5 mm, ELW 2.8 mm, EYL 0.6 mm, AW 2.5 mm, ESL 1.9 mm.

Body moderately stout, surface almost smooth and shining. Head brownish yellow, with spear-shaped black spot on vertex; antennae, labrum, maxillary and labial palpi brownish yellow, mandibles and underside of head black. Pronotum brownish yellow with a dumbbell shape black marking on midline, and scutellum black. Elytra brownish yellow, each with a large black marking at outer apical angle extending from posterior three fifths of lateral margin to apex of suture; prosternum and meso-metasternum black; legs brownish yellow. Abdomen with tergites 3–4 brownish yellow with black median spots; tergites 5–7 forming a large black marking except outside of basolateral ridges brownish yellow; apical portion of tergie 8 brownish yellow, and all abdominal sternites black except 3–6 paratergites yellow ( Figs 2–3 View Figures 2–3 ).

Male. Head oval, wider than long (ratio 1.16), broader (ratio 1.22) and longer (ratio 1.27) than pronotum, gently arcuate behind eyes, posterior angles obtuse; eyes slightly large and convex, temples distinctly longer than eyes seen from above (ratio 1.83). Antennae slightly shorter than head (ratio 0.95); segments 1–4 elongate; segments 5–10 transverse, slightly asymmetrical and flattened; apical segment narrower than preceding segment; all antennal segments with long setae near apices, segments 6–10 glabrous medially and covered with fine setae laterally. Labrum broadly and deeply emarginate at anterior margin; mandibles shorter than head (ratio 0.84), moderately broad, inner edges evenly curved to acute apices; maxillary palpi with first segment shortest, second longer than third, slightly wider than last and almost equal in length; apical segment of labial palpi wider than length of eye (ratio 1.17). Clypeus with anterior margin broadly, shallowly emarginate medially; frons broadly, shallowly impressed between antennal insertions; vertex nearly smooth.

Pronotum wider than long (ratio 1.20), shorter (ratio 0.60) and narrower (ratio 0.64) than elytra, lateral margins slightly sinuate anteriad and subarcuately narrowed posteriad, widest at about anterior third; disc almost impunctate, deeply transversely depressed before middle, two rows of small punctures along anterior margin, a row of small punctures near middle of posterior margin; six setiferous punctures along anterior margin, two ones close to posterior margin, a few ones at or near lateral margins.

Scutellum impunctate, surface almost smooth, rounded at apex.

Elytra wider than long (ratio 1.12), slightly widened apicad; each elytron with a row of regular small punctures along suture, three longitudinal rows of coarse irregular punctures in middle, a few scattered coarse punctures on medial and lateral sides of rows; apical, lateral, and posterior margins bearing a few short setae. Hide wings well developed.

Abdomen with tergites 3–4 each with a pair of pruinous spots in middle; punctation of tergites very sparse and vague, surface between punctures with exceedingly fine and dense microsculpture of transverse striae; sternite 8 black brownish with apical portion brownish yellow, and almost truncate at posterior margin ( Figs 4–5 View Figures 4–8 ).

Aedeagus slightly asymmetrical, median lobe somewhat widened apicad and slightly narrowed in base, with apical margin rounded ( Figs 6–8 View Figures 4–8 ); parameras short and slender, gradually narrowed apicad, right lobe and left one each with a minute apical seta at apex ( Figs 14–15 View Figures 14–17 ).

Female. Similar to male, but head about as wide as pronotum, mandibles slightly shorter than that of male, posterior margin of sternite 8 arcuately produced.

Material examined. Holotype ♂, China, Sichuan, Wolong Natural Reserve , Wenchuan County (30°50'N, 103°15'E; elev. 2400 m), 7 August 2019, coll. Chuan Jiang. Paratypes. 2♀, same data as holotype GoogleMaps .

Habitat and distribution. The species was found in fungi. It is at present known from the type locality in Sichuan Province .

Etymology. The specific epithet is patronymic in honor of the collector of the type specimens, Mr. Chuan Jiang.