Ocypus (Pseudocypus) denticulminis, 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 : 12-16

2. Ocypus (Pseudocypus) denticulminis sp. nov.

( Figs. 2-1, 2-2, 2-3 )

Type locality: CHINA, Sichuan Province, Wolong National Nature Reserve.

Type material. Holotype male, CHINA: Sichuan Province: Wolong National Nature Reserve, Wuyipeng , 2540 m, birch forest, pitfall traps, 14–29.VI.2004, coll. Xiaodong Yu (IZ-CAS) . Paratypes: CHINA: Sichuan Province: 1 male, Wolong National Nature Reserve, Wulidun, 2430 m, man-made larch forest, pitfall traps, 23–26.V.2004, coll. Xiaodong Yu (IZ-CAS); 3 males, 1 female, Wolong National Nature Reserve , Wulidun , 2395–2410 m, man-made larch forest, pitfall traps, 21–25.VI.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve , Wulidun , 2430 m, man-made larch forest, pitfall traps, 7–10.VII.2004, coll. Xiaodong Yu (IZ-CAS); 6 males, Wolong National Nature Reserve , Wulidun , 2395–2430 m, man-made larch forest, pitfall traps, 22–25.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve , Wulidun , 2410 m, manmade larch forest, pitfall traps, 5–8.VIII.2004, coll. Xiaodong Yu (IZ-CAS); 1 female, Wolong National Nature Reserve , Wulidun , 2410 m, man-made larch forest, pitfall traps, 21–24.VIII.2004, coll. Xiaodong Yu (IZ-CAS); 3 females, Wolong National Nature Reserve , Wuyipeng , 2535 m, mixed broadleaf-conifer forest, pitfall traps, 30.IV–3.V.2004, coll. Xiaodong Yu (IZ-CAS); 2 males, Wolong National Nature Reserve , Wuyipeng , 2535 m, mixed broadleaf-conifer forest, pitfall traps, 14–29.VII.2004, coll. Xiaodong Yu (IZ-CAS); 7 males, Wolong National Nature Reserve , Wuyipeng , 2535–2600 m, mixed broadleaf-conifer forest, pitfall traps, 39. VI–14. VII.2004, coll. Xiaodong Yu (IZ-CAS); 6 males, Wolong National Nature Reserve , Wuyipeng , 2535–2600 m, mixed broadleaf-conifer forest, pitfall traps, 14–29.VI.2004, coll. Xiaodong Yu (IZ-CAS); 3 males, 1 female, same data as holotype (IZ-CAS); 1 male, 1 female, Wolong National Nature Reserve , Wuyipeng , 2540–2545 m, birch forest, pitfall traps, 29.V–14.VI.2004, coll. Xiaodong Yu (IZ-CAS); 7 males, 1 female, Wolong National Nature Reserve , Wuyipeng , 2540–2580 m, birch forest, pitfall traps, 29.VI–14.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve , Wuyipeng , 2580 m, birch forest, pitfall traps, 30.IV–3.V.2004, coll. Xiaodong Yu (IZ-CAS); 2 females, Wolong National Nature Reserve , Wuyipeng , 2630–2675 m, rhododendron forest, pitfall traps, 30.IV–3.V.2004, coll. Xiaodong Yu (IZ-CAS); 4 males, Wolong National Nature Reserve , Wuyipeng , 2630–2675 m, rhododendron forest, pitfall traps, 29.V–1.VI.2004, coll. Xiaodong Yu (IZ-CAS); 3 males, 2 females, Wolong National Nature Reserve , Wuyipeng , 2630–2675 m, rhododendron forest, pitfall traps, 14–29.VI.2004, coll. Xiaodong Yu (IZ-CAS); 2 males, Wolong National Nature Reserve , Wuyipeng , 2630–2675 m, rhododendron forest, pitfall traps, 29.VI–14.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve , Wuyipeng , 2710 m, fir forest, pitfall traps, 29.V–1.VI.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve , Wuyipeng , 2710 m, fir forest, pitfall traps, 14–17.VI.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve , Wuyipeng , 2710 m, fir forest, pitfall traps, 29.VI–14.VII.2004, coll. Xiaodong Yu (IZ-CAS); 2 females, Wolong National Nature Reserve , Wuyipeng , Yuancaodi , 2330 m, primitive coniferous forest, pitfall traps, 1–4.V.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, 4 females, Wolong National Nature Reserve , Wuyipeng , Yuancaodi , 2495 m, primitive coniferous forest, pitfall traps, 31.V–3.VI.2004, coll. Xiaodong Yu (IZ-CAS); 2 males, Wolong National Nature Reserve , Wuyipeng , Yuancaodi , 2495–2515 m, primitive coniferous forest, pitfall traps, 16.VI–1.VII.2004, coll. Xiaodong Yu ( IZ- CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2495 m, primitive coniferous forest, pitfall traps, 1–16.VII.2004, coll. Xiaodong Yu (IZ-CAS); 5 males, 1 female, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2495–2520 m, primitive coniferous forest, pitfall traps, 16–31.VII.2004, coll. Xiaodong Yu (IZ-CAS); 2 males, 2 females, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2450–2500 m, primitive birch forest, pitfall traps, 31.V–3.VI.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, 1 female, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2500 m, primitive birch forest, pitfall traps, 16.VI–1.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 female, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2385 m, man-made spruce forest, pitfall traps, 1–4.V.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, 1 female, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2490–2525 m, man-made spruce forest, pitfall traps, 1–4.V.2004, coll. Xiaodong Yu ( IZ- CAS); 2 males, 2 females, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2380 m, man-made spruce forest, pitfall traps, 31.V–3.VI.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2490 m, man-made spruce forest, pitfall traps, 31.V–3.VI.2004, coll. Xiaodong Yu ( IZ- CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2380 m, man-made spruce forest, pitfall traps, 16–19.V.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2490 m, man-made spruce forest, pitfall traps, 16–19.V.2004, coll. Xiaodong Yu (IZ-CAS); 1 female, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2380 m, man-made spruce forest, pitfall traps, 16.VI–1.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, 1 female, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2490–2525 m, man-made spruce forest, pitfall traps, 16.VI–1.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2380 m, man-made spruce forest, pitfall traps, 1–16.VII.2004, coll. Xiaodong Yu (IZ-CAS); 6 males, 1 female, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2490–2525 m, man-made spruce forest, pitfall traps, 1–16.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2525 m, man-made spruce forest, pitfall traps, 16–31.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, 5 females, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2490–2525 m, man-made spruce forest, pitfall traps, 16–31.VIII.2004, coll. Xiaodong Yu (IZ-CAS); 1 female, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2490 m, man-made spruce forest, pitfall traps, 31.VIII–16.IX.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2400 m, natural mixed forest, pitfall traps, 31.V–3.VI.2004, coll. Xiaodong Yu (IZ-CAS); 2 males, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2505 m, natural mixed forest, pitfall traps, 31.V–3.VI.2004, coll. Xiaodong Yu (IZ-CAS); 2 males, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2370 m, natural mixed forest, pitfall traps, 16.VI–1.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, 1 female, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2370 m, natural mixed forest, pitfall traps, 16–31.VIII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2550 m, man-made larch forest, pitfall traps, 16.VI–1.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2550 m, man-made larch forest, pitfall traps, 1–16.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2570 m, man-made larch forest, pitfall traps, 16–31.VII.2004, coll. Xiaodong Yu (IZ-CAS); 1 male, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2550 m, man-made larch forest, pitfall traps, 31.VII–6.VIII.2004, coll. Xiaodong Yu ( IZ- CAS); 2 males, Wolong National Nature Reserve, Wuyipeng, Yuancaodi, 2550 m, man-made larch forest, pitfall traps, 16–31.VIII.2004, coll. Xiaodong Yu (IZ-CAS).

Measurements. Body length: 18.4–21.9 mm. CL: 0.65; EL: 2.73; ELS: 1.14; EW: 3.08; HL: 2.65; HW: 3.28; PO: 1.40; PL: 3.33; PW: 2.89.

Description. Medium to large-sized species. Body elongate, entirely black to dark brownish black; maxillary and labial palpi brunneous, antennae dark brunneous, with apical segments vaguely paler; legs dark brownish black, with tibiae and protarsus covered with brunneous pubescence; pubescence of dorsal side of head and pronotum dark rufous, and that of elytra and abdominal tergites almost the same.

Head of quadrangular shape, large and wide, distinctly wider than pronotum in dorsal view, considerably wider than long (ratio 1.24), with almost parallel lateral sides and rounded posterior angles. Eyes small and slightly protruding, distinctly shorter than tempora (ratio 0.46) in dorsal view; punctation and pubescence on dorsal surface of head relatively dense, puncture intervals smaller than diameters of punctures; no impunctate midline present. Gular sutures distinctly separated. Antenna moderately long, segment 3 longer than segment 2 (ratio 1.14), segments 4 to 7 longer than wide, becoming shorter gradually, segments 8–10 about as long as wide. Pronotum longer than wide (ratio 1.15), with almost parallel lateral sides; narrow marginal groove disappearing downwards at half of pronotal length; disc with distinct, entire impunctate midline; punctation and pubescence on disc about same as that on dorsal surface of head, slightly sparser. Pronotal hypomeron lacking microsetae. Scutellum finely punctate and setose on entire surface. Elytra short, moderately depressed at base, vaguely dilated posteriad; elytral length shorter than pronotum along midline, with a ratio of 0.34 along suture and a ratio of 0.82 along sides; punctation finer and denser than that on disc of head, combined with very dense microsculpture. Wings markedly reduced. Abdominal tergite 2 covered with moderately dense and fine punctures and pubescence on entire surface; all visible abdominal tergites finely and densely punctate, punctation slightly becoming sparser and coarser toward apex of abdomen; no yellowish tomentose pubescence present on visible tergites 4 and 5.

Male. Sternite 8 with moderately deep and obtusely triangular medioapical emargination ( Fig. 2-2 J ). Sternite 9 with obtuse apical emargination wide and shallow, tapered basal portion relatively short ( Fig. 2-2 H ). Tergite 10 elongate, evenly narrowed toward widely arcuate apex, sparsely setose, with apical half strongly sclerotized ( Fig. 2-2 A ). Aedeagus large and elongate ( Figs. 2-1 B, C, 2-2 B–D ); median lobe simple and elongate, shaped as in Fig. 2-2 F ; paramere also elongate; sensory peg setae arranged along apical margin of paramere, not numerous ( Figs. 2- 1 D, 2-2 G ).

Female. Apical portion of second gonocoxite relatively narrow ( Figs. 2-1 E, 2- 2 I ). Tergite 10 of female relatively narrow, with strongly sclerotized apical portion and subtruncate apex, sparsely setose ( Fig. 2-2 E ).

Distribution. Ocypus denticulminis sp. nov. is at present known only from Wolong National Nature Reserve in central Sichuan Province.

Notes. Ocypus denticulminis sp. nov. can be easily distinguished from congeners by the wide head, the elongate body shape and the large and elongate aedeagus.

The shape of teeth on the mandibles of Ocypus denticulminis sp. nov. shows some interesting variations. Specimens have been seen with both teeth that can be easily distinguished from each other ( Fig. 2-3 A ), with both teeth combined to form a knife-shaped structure ( Fig. 2-3 C ) and many transitions between these two forms ( Fig. 2- 3 B ).

There are two special specimens collected in Wulidun (1 female, Wolong National Nature Reserve, Wulidun, 2395 m, man-made larch forest, pitfall traps, 23–26.V.2004, coll. Xiaodong Yu (IZ-CAS); 1 female, Wolong National Nature Reserve, Wulidun, 2430 m, man-made larch forest, pitfall traps, 22–25.VIII.2004, coll. Xiaodong Yu (IZ-CAS)) ( Fig. 2-3 D ). These two specimens are distinctly larger and can be easily distinguished from other specimens of Ocypus denticulminis sp. nov. However, except body size, most characteristics of these two specimens are similar to Ocypus denticulminis sp. nov. Since there are no similar male specimens, it’s hard to tell whether these two specimens merely represent intraspecific variation or another larger species. To be prudent, we didn’t list these two specimens among the paratypes of Ocypus denticulminis sp. nov.

Etymology. The specific epithet, denticulminis , is from Latin words " dentatus " (denticle, to indicate the denticle-like structure of mandibles) and " culmen " (culminis, tip, top).

Figures

FIGURE 1 - 2. Ocypus (Pseudocypus) pileaticulminis sp. nov.: A. male tergite 10; B and D. aedeagus, lateral view; C. aedeagus, ventral view; E. female tergite 10; F. apical portion of median lobe, ventral view, paramere removed; G. underside of apical portion of paramere; H. male sternite 9; I. second gonocoxite of female genital segment; J. male sternite 8. Scale bars = 0.50 mm.

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.