Ocypus (Pseudocypus) digiticulminis He & Zhou 2017, sp. nov.
Creators: name: He, Liang
name: Zhou, Hong-Zhang
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Ocypus
Ocypus digiticulminis

description: 4. Ocypus (Pseudocypus) digiticulminis sp. nov.
(Figs. 4-1, 4-2)
Type locality: CHINA, Sichuan Province, Baoxing County, Guobayangou.
Type material. Holotype male, CHINA: Sichuan Province: Baoxing County, Guobayangou, 2503 m, fir forest, pitfall traps, 4–7.VIII.2003, coll. Xiaodong Yu (IZ-CAS). Paratypes: CHINA: Sichuan Province: 1 male, 4 females, same data as holotype (IZ-CAS); 4 males, 2 females, Baoxing County, Guobayan, 2290 m, bamboo forest and broad-leaved forest, pitfall traps, 1–4.VII.2001, coll. Xiaodong Yu & Hongzhang Zhou (IZ-CAS); 4 males, 3 females, Baoxing County, Guobayan, 2445 m, bamboo forest, pitfall traps, 1–4.VII.2001, coll. Xiaodong Yu & Hongzhang Zhou (IZ-CAS); 1male, 1 female, Baoxing County, Guobayan, 3340 m, alpine rhododendron forest, pitfall traps, 1–4.VII.2001, coll. Xiaodong Yu & Hongzhang Zhou (IZ-CAS); 1male, Baoxing County, Guobayangou, 2306 m, bamboo forest and broad-leaved forest, pitfall traps, 4–7.VIII.2003, coll. Xiaodong Yu (IZ- CAS); 11 males, 7 females, Baoxing County, Guobayangou, 2507 m, broad-leaved forest, pitfall traps, 4–7.VIII.2003, coll. Xiaodong Yu (IZ-CAS).
Measurements. Body length: 21.9–26.8 mm. CL: 0.92; EL: 3.48; ELS: 1.51; EW: 3.97; HL: 3.51; HW: 4.46; PO: 2.04; PL: 4.54; PW: 4.01.
Description. Large sized species. Body robust, entirely black; maxillary and labial palpi dark reddish-brown, antennae dark reddish-brown, gradually becoming paler towards apex; legs dark reddish-brown; protibia and protarsus covered with dense brown pubescence; pubescence of dorsal side of body uniformly brownish-black.
Head of rounded quadrangular shape, large and wide, with rounded posterior angles, wider than long (ratio 1.27). Eyes small and slightly protruding, considerably shorter than tempora (ratio 0.45) in dorsal view. Punctation and pubescence on dorsal surface of head moderately dense and fine, puncture intervals smaller than diameters of punctures; punctation gradually becoming sparser toward clypeus; impunctate midline vague. Gular sutures distinctly separated, and gular become strip-shaped in midsection. Antenna moderately long, segment 3 longer than segment 2 (ratio 1.18), segments 4–8 distinctly longer than wide, gradually becoming shorter, segments 9 and 10 about as long as wide, segment 11 wider and longer than segment 10. Pronotum longer than wide (ratio 1.13), with almost parallel lateral sides; narrow marginal groove disappearing downwards at about half of pronotal length; impunctate midline distinct on most specimens; punctation and pubescence on disc about same as that on dorsal surface of head, slightly sparser. Pronotal hypomeron lacking microsetae. Scutellum short and wide, finely punctate and setose on entire surface. Elytra short and narrow, about as wide as pronotum, slightly depressed at base, with almost parallel lateral sides; elytral length shorter than pronotum along midline, with a ratio of 0.33 along suture and a ratio of 0.76 along sides; elytral punctation much finer and denser than that on disk of head, combined with very dense microsculpture. Wings markedly reduced. Abdominal tergite 2 densely and finely punctate and pubescent; all visible abdominal tergites finely and densely punctate, punctation gradually becoming sparser toward apex of abdomen; no yellowish tomentose pubescence present on visible tergites 4 and 5.
Male. Sternite 8 with shallow and obtusely triangular medioapical emargination (Fig. 4-2 J). Sternite 9 relatively elongate, shaped as in Fig. 4-2 H, with apical emargination narrowly obtuse; tapered basal portion wide and short. Tergite 10 elongate, almost evenly narrowed toward arcuate apex, sparsely setose (Fig. 4-2 A). Aedeagus large, totally black, strongly sclerotized (Figs. 4-1 B, C, 4-2 B–D); apical portion of median lobe lanceolate, almost symmetrical (Fig. 4-2 F); paramere wide finger like, with apical portion obtusely rounded; underside of paramere with numerous sensory peg setae arranged along apical and middle margins (Figs. 4-1 D, 4-2 G).
Female. Apical portion of second gonocoxite bearing a single large seta (Figs. 4-1 E, 4- 2 I). Tergite 10 of female moderately wide, with apical portion considerably narrowed; large area of apical and middle portion strongly sclerotized (Fig. 4-2 E).
Distribution. Ocypus digiticulminis sp. nov. is at present known only from Baoxing County in central Sichuan.
Notes. Ocypus digiticulminis sp. nov. is most similar to Ocypus anguliculminis sp. nov. in general habitus, but the two species can be distinguished from each other by the differently shaped aedeagus and the subtle differences in their body colors.
Etymology. The specific epithet, digiticulminis, is from Latin words " digitus " (finger like, to indicate the special form of the parameral apex) and " culmen " (culminis, tip, top).
description: Published as part of He, Liang & Zhou, Hong-Zhang, 2017, Taxonomy of the subgenus Pseudocypus Mulsant & Rey (Coleoptera: Staphylinidae: Staphylinini) and eight new species from China, pp. 1-77 in Zootaxa 4339 (1) on page 20, DOI: 10.11646/zootaxa.4339.1.1, http://zenodo.org/record/1037681