Oxytelus robustus Schubert, 1906

Oxytelus robustus Schubert, 1906 View in CoL

( Figs. 17A–P)

Schubert, 1906: 383 ( Type locality: Kashmir, Sintan); Bernhauer and Schubert, 1911: 118; Cameron, 1930: 228 (subgenus Tanycraerus ; Kashmir); Koch, 1932: 655; Scheerpeltz, 1933: 1102; Herman, 1970: 410; Abdullah and Qadri, 1970: 122 ( West Pakistan); Coiffait, 1983: 276 (Kashmir); Herman, 2001: 1453; Smetana, 2004: 517 (subgenus Tanycraerus ).

Material examined. 44 specimens, 28 males and 16 females. 1 male, Kashmir, lg. Rost.// 9// robustus Schub. Cotypus // Chicago NHMus, M.Bernhauer Collection// Oxytelus robustus Schub , Paralectotype, P.Hammond det. 1970 ♂ ( FMNH); 1 male, Sintan Kashmir// robustus Sch. det.Bernhauer, Staudinger.// Chicago NHMus, M.Bernhauer Collection// Oxytelus robustus Schub , Paralectotype, P.Hammond det. 1970 ♂ ( FMNH); 1 female, Sintan Kashmir// robustus Sch. , det.Bernhauer, Staudinger.// Chicago NHMus, M.Bernhauer Collection// Oxytelus robustus Schub , Paralectotype, P.Hammond det. 1970 ♀ ( FMNH); CHINA, Beijing, Donglingshan [=Mt. Dongling]: 2 males, 4 females, 2000-2300m, 23.VI.2000, Hong-Zhang Zhou leg. ( IZ-CAS); 2 males, 1 females, 2070m, birch forest, sifting, 23.VI.2000, Xiao-Dong Yu leg. ( IZ-CAS); CHINA, Gansu: 1 female, Wenxian, Qiujiaba, 3200–3400m, 30.VI.1998, Jun Chen leg. ( IZ-CAS); CHINA, Sichuan: 1 male, Wolong, Balangshan [=Mt. Balang], 3700m, alpine meadow, pitfall trap, 4–7.VIII.2004, Xiao-Dong Yu leg. ( IZ-CAS); 1 female, same data as previous except: 3800m [elevation] ( IZ-CAS); 1 male, same data as previous except: 20–23.VIII.2004 (IZ- CAS); 1 male, 1 female, Ludingxian, Yajiagen mountain pass, 3984m, cow dung, 22.V.2009, Yu-Lingzi Zhou leg. ( IZ-CAS); 1 male, 1 female, near the outfall of Yajiang river, Jianzi mountain pass, 4440m, 25.V.2009, Hong-Bin Liang leg. ( IZ-CAS); 1 male, Litang, Gemuxiang, Tu'ershan, 3656m, cow dung, 31.V.2009, Yu-Lingzi Zhou leg. ( IZ-CAS); 17 males, 5 females, Batangxian, Cuopugou Lake, 4060m, cow dung, 4.VI.2009, Yu-Lingzi Zhou leg. ( IZ-CAS); INDIA: 1 female, Kashmir, Gulmarg, VI–VII.1931, M. Cameron leg. ( FMNH).

Redescription. Body black. Antennae, elytra and legs testaceous to black. Maxillae a little lighter. Length [average] male, 4.7 mm; female, 4.7 mm.

Male. Head ( Fig. 17A) widest at temples or eyes. Disc punctate, not pubescent. Clypeus subrectangular, protruding beyond anterior margin of supra-antennal ridges, a little longer than 1/4 head length, depressed in anterior part, surface sparingly punctate; anterior margin broadly emarginate, with denticle at either end. Epistomal suture with lateral portions incurved and running posteriorly a little beyond level of anterior margin of eyes. Vertex slightly convex but flat anteriorly, posterior part poorly limited and continuous with neck in median; midlongitudinal suture feeble, paralateral sutures extending anteriorly but not touching level of posterior margin of eyes. Eyes with fine facets, lightly convex, a little shorter than temples. Temples rounded and dilated. Occipital suture with middle portion absent; nuchal ridge present but discontinuous in middle, dorsal basal ridge present.

Mandible ( Fig. 17C) stout, slightly curved; two denticles on inner edge near middle and near apex each. Antenna ( type I) shorter than head and pronotum together, with apical antennomere shorter than two preceding together.

Pronotum transverse, broadest at near anterior 1/3, obviously wider than head. Disc punctate and 3-sulcate (as Fig. 1H), median sulcus and two slightly curved paramedial sulci deep; two paralateral depressions shallow; lateral margin even, only weakly crenulate at posterolateral angles; posterolateral angles not prominent. Elytra punctate and rugose, lateral longitudinal ridge absent.

Abdomen coriaceous and pubescent, broadest at segment V or VI. Sternite VII ( Fig. 17E) with posterior margin straight, adorned with two denticles near middle a little behind posterior margin. Sternite VIII ( Fig. 17F) produced in middle of posterior margin forming narrow median lobe, apex of which emarginate and with fine transverse carina a little behind; at base of median lobe with two elevated denticles directed backward. Tergite IX ( Fig. 17H) with “ventral strut” ( Naomi 1989: 726, 728) broadened, flattened and thickened. Tergite X ( Fig. 17J) longer than wide, posterior margin weakly and narrowly emarginate in middle, with two lines of setae on haired posterior part.

Aedeagus ( Figs. 17M–P). Median lobe oblong-ovoid, weakly bulbous at base, obviously constricted from middle and narrowing toward apex; with membranous structures in apical part of median lobe; apical orifice small; apico-medial hook fishhook-shaped in lateral view, diverging at base and bent at near middle, with apical tip pointed; dorsal membranous area not covering all dorsum and not across length of median lobe. Paramere arm-like, broadened in dorsal view, with seta on apical 1/3, with furrow on basal arm.

Female. Head ( Fig. 17B) subtriangular; clypeus with lateral portions of epistomal suture not incurved at posterior; vertex posterior part well-limited and separated from neck by occipital suture; mid-longitudinal suture feeble; paralateral sutures running forward to level of posterior margin of eyes; eyes longer than temples, convex and protruding laterally; occipital suture with median portion present and obvious. Mandible ( Fig. 17D) slender and less curved, with transverse carina across middle of dorsal surface.

Abdominal sternite VII without denticles behind posterior margin. Sternite VIII ( Fig. 17G) with middle portion of posterior margin shortly and gradually produced backward and deflexed in ventral view. Tergite IX ( Fig. 17I) without “ventral strut”, but anterior margin somewhat serrate, anterior to tergite IX with separate transverse ventral sclerite, and connected with tergite IX by membrane. Tergite X ( Fig. 17K) scutiform, with anterior margin broadly rounded in middle, with posterior margin truncate.

Spermatheca ( Fig. 17L) ʋ- shaped, constricted and bended at middle, basal portion slightly inflated, and apex rounded.

Distribution. China ( Beijing, Gansu, Sichuan); Pakistan; India.