Ocypus (Pseudocypus) anguliculminis, He & Zhou, 2017

He, Liang & Zhou, Hong-Zhang, 2017, Taxonomy of the subgenus Pseudocypus Mulsant & Rey (Coleoptera: Staphylinidae: Staphylinini) and eight new species from China, Zootaxa 4339 (1), pp. 1-77 : 17

3. Ocypus (Pseudocypus) anguliculminis sp. nov.

( Figs. 3-1, 3-2 )

Type locality: CHINA, Sichuan Province, Danba County, Geshizaxiang.

Type material. Holotype male, CHINA: Sichuan Province: west of Danba County, Geshizaxiang , 2640 m, mixed broad-leaved forest, pitfall traps, 20–22.VII.2001, coll. Xiaodong Yu & Hongzhang Zhou (IZ-CAS) . Paratypes: CHINA: Sichuan Province: 9 males, 6 females, same data as holotype (IZ-CAS) ; 5 males, 3 females, west of Danba County, Geshizaxiang, 2610 m, mixed broadleaf-conifer forest, pitfall traps, 20–22.VII.2001, coll. Xiaodong Yu & Hongzhang Zhou (IZ-CAS) ; 2 males, 3 females, west of Danba County, Geshizaxiang, 2620–2680 m, mixed broad-leaved forest, pitfall traps, 20–22.VII.2001, coll. Xiaodong Yu & Hongzhang Zhou (IZ-CAS).

Measurements. Body length: 20.6–24.3 mm. CL: 0.76; EL: 3.22; ELS: 1.48; EW: 3.85; HL: 2.99; HW: 3.89; PO: 1.66; PL: 4.09; PW: 3.68.

Description. Large sized species. Body robust, entirely black; maxillary and labial palpi dark brunneous; antennae black, with apical segments gradually becoming paler; legs black; protibia and protarsus covered with dense brown pubescence; pubescence of dorsal side of head and pronotum black, and that of elytra and abdominal tergites almost the same.

Head of rounded quadrangular shape, moderately large, with rounded lateral sides and posterior angles, distinctly wider than long (ratio 1.30), posterior half slightly becoming narrower towards basal portion; tempora moderately long. Eyes relatively small and slightly protruding, considerably shorter than tempora (ratio 0.46) in dorsal view. Punctation and pubescence on dorsal surface of head relatively dense and fine, puncture intervals about as long as or smaller than diameters of punctures; punctation gradually becoming sparser toward clypeus; no impunctate midline present. Gular sutures distinctly separated. Antenna moderately long, segment 3 distinctly longer than segment 2 (ratio 1.38), segments 4 to 7 longer than wide, segment 8 to 10 about as long as wide, segment 11 longer than segment 10 (ratio 1.18), all segments except segment 11 gradually becoming shorter toward apex. Pronotum vaguely longer than wide (ratio 1.11), with almost parallel lateral sides; narrow marginal groove disappearing downwards at anterior third of pronotal length; impunctate midline distinct; punctation and pubescence on disc sparser than that on dorsal surface of head, puncture intervals larger than diameters of punctures. Pronotal hypomeron lacking microsetae. Scutellum finely punctate and setose on entire surface. Elytra short, moderately depressed at base, slightly dilated posteriad; elytral length shorter than pronotum along midline, with a ratio of 0.36 along suture and a ratio of 0.79 along sides; punctation much finer and denser than that on head disc, combined with very fine and dense microsculpture. Wings markedly reduced and budlike. Abdomen tergite 2 densely and finely punctate and pubescent on entire surface; all visible abdominal tergites very densely and finely punctate and pubescent, punctation becoming slightly sparser and coarser toward apex of abdomen; no yellowish tomentose pubescence present on visible tergites 4 and 5.

Male. Sternite 8 with wide and markedly deep, acutely triangular medioapical emargination ( Fig. 3-2 J ). Sternite 9 with narrow and shallow, acute apical emarginate, tapered basal portion moderately long ( Fig. 3-2 H ). Tergite 10 wide, shaped as in Fig. 3-2 A . Aedeagus large and long, almost totally black, strongly sclerotized ( Figs. 3-1 B, C, 3-2 B–D ); apical portion of median lobe elongate and narrow ( Fig. 3-2 F ); apical portion of paramere slightly asymmetrical, almost square-shaped ( Figs. 3-1 D, 3-2 G ); all sensory peg setae arranged in two lines near lateral sides and apical ends of paramere; several sensory peg setae joined together, forming two hornlike structure near apex ( Fig. 3-1 D ).

Female. Second gonocoxite robust, moderately long ( Figs. 3-1 E 3- 2 I ). Tergite 10 of female moderately wide, with apical portion strongly sclerotized; lateral sides each with a large semi-circular indentation; apical portion gradually narrowed toward subacute apex, sparsely setose ( Fig. 3-2 E ).

Distribution. Ocypus anguliculminis sp. nov. is at present known only from Danba County in western Sichuan Province.

Notes. Ocypus anguliculminis sp. nov. can be easily distinguished from congeners by the aedeagus of the males and the special shaped tergite 10 of females.

Etymology. The specific epithet, anguliculminis , is from Latin words " angulus "(angle like, to indicate the special form of parameral apex) and " culmen " (culminis, tip, top).

Figures

FIGURE 2 - 3. Ocypus (Pseudocypus) denticulminis sp. nov.: A, B and C: variations of teeth on mandibles (1.0 mm); D. habitus of one of the special large specimens collected together with Ocypus (Pseudocypus) persiciculminis sp. nov. (2.0 mm). Scale in parentheses.