Oxytelus ailaoshanicus, Lü & Zhou, 2012

Lü, Liang & Zhou, Hong-Zhang, 2012, 3576, Zootaxa 3576, pp. 1-63 : 12-14

Oxytelus ailaoshanicus sp. nov.

( Figs. 3A–O)

Type material. Holotype: male, CHINA, Yunnan, Jingdong, Ailaoshan [=Mt. Ailao], South of the Ailaoshan station , 24º32.36'N 101º01.67'E, 2475–2480m, pitfall trap, 18.IX.2010, Liang Lü & Xi Zhang legg. ( IZ-CAS) . Paratypes: CHINA, Shaanxi, Meixian : 3 males, 1 female, Taibaishan [=Mt. Taibai], 2400m, grass heap trap, 5.VI.2007, Hong-Zhang Zhou leg. ( IZ-CAS) ; CHINA, Sichuan, Wolong: 1 male, Wulidun , 2650m, pitfall trap, 21–24.VI.2004, Xiao-Dong Yu leg. ( IZ-CAS) ; 1 male, Wulidun , 2220m, in pine forest, pitfall trap, 1–4.IV.2005, Xiao-Dong Yu leg. ( IZ-CAS) ; 2 males, Wuyipeng , 2580m, birch forest, pitfall trap, 17–20.IV.2005, Xiao-Dong Yu leg. ( IZ-CAS) ; CHINA, Yunnan, Jingdong, Ailaoshan : 3 males, 11 females, same data as holotype ( IZ-CAS) ; 3 males, same data as holotype except: 24º32.359'N 101º01.668'E, 2485–2520m, forest litter, sifting, 17.IX.2010, Yu-Lingzi Zhou leg. ( IZ-CAS) ; 2 males, same data as holotype except: 2450–2465m ( IZ-CAS) ; 2 males, 1 female, same data as holotype except: 2482–2520m ( IZ-CAS) ; 1 male, 1 female, same data as holotype except: 24º32.359'N 101º01.668'E, 2440–2485m, flight interception trap ( IZ-CAS) ; 1 female, same data as previous except: 2497m, Yu-Lingzi Zhou & Xi Zhang legg. ( IZ-CAS) ; 1 female, same data as previous except: 21.IX.2010 ( IZ-CAS) ; 4 females, same data as holotype except: 24º32.359'N 101º01.668'E, 2440–2485m, 20.IX.2010, Xi Zhang & Liang Lü legg. ( IZ-CAS) ; 1 male, same data as holotype except: 2513m, flight interception trap, 19.IX.2010, Yu-Lingzi Zhou & Xi Zhang legg. ( IZ-CAS) ; 3 males, same data as holotype except: 24º32.359'N 101º01.668'E, 2440–2485m, 20.IX.2010, Xi Zhang & Liang Lü legg. ( IZ-CAS) ; 3 males, same data as holotype except: North of the research station, 24º32.806'N 101º01.665'E, 2485m, tea plantation, 20.IX.2010 ( IZ-CAS) ; 2 females, same data as holotype except: 24º32.951'N 101º01.656'E, 2500m, flight interception trap, 15–16.IX.2010, Yu-Lingzi Zhou leg. ( IZ-CAS) ; 2 males, 2 females, same data as previous except: 21.IX.2010 ( IZ-CAS) ; 2 females, same data as holotype except: 24º32.682'N 101º01.668'E, 2513m, flight interception trap, 21.IX.2010, Yu-Lingzi Zhou & Xi Zhang legg. ( IZ-CAS) ; 1 male, Xujiaba reservoir, 24º32.411'N 101º01.012'E, 2400m, flight interception trap, 21.IX.2010, Yu-Lingzi Zhou leg. ( IZ-CAS) ; 1 male, 1 female, same data as previous except: flight interception trap, 22.IX.2010 ( IZ-CAS) ; 1 female, West of the Ailaoshan station , 2500m, cow dung, 21.IX.2010, Yu-Lingzi Zhou & Xi Zhang legg. ( IZ-CAS) ; 2 females, East of the Ailaoshan station , 24º32.94'N 101º02.27'E, 2465m, pitfall trap, 22.IX.2010, Xi Zhang & Liang Lü legg. ( IZ-CAS) ; CHINA, Yunnan, Lijiang: 7 males, 6 females, Maoniuping , 3115m, coniferous forest, fungi, 1.VIII.2000, Xiao-Dong Yu leg. ( IZ-CAS) ; 5 males, 6 females, same data as previous except: Hong-Zhang Zhou leg. ( IZ-CAS) ; 8 males, 27 females, same data as previous except: Abies forest, 3.VIII.2000, Xiao-Dong Yu leg. ( IZ-CAS) ; 24 males, 31 females, same data as previous except: Hong-Zhang Zhou leg. ( IZ-CAS) ; 1 male, East of the town, river bank, 2450m, Juglans forest, pitfall trap, 2–3.VIII.2000, Xiao-Dong Yu & Hong-Zhang Zhou legg. ( IZ-CAS) ; 3 males, 2 females, Yulongxueshan [=Mt. Satseto] Nature Reserve , 2980m, pine forest, fungi, 3.VIII.2000, Hong-Zhang Zhou leg. (IZ- CAS) ; 1 male, 2 females, same data as previous except: pine forest, pitfall trap, 1–3.VIII.2000, Xiao-Dong Yu & Hong-Zhang Zhou legg. ( IZ-CAS) ; 1 female, Shiguzhen, West of the town, roadside, 1895m, grass heap trap, 4.VIII.2000, Hong-Zhang Zhou leg. ( IZ-CAS) ; CHINA, Yunnan, Yongshengxian : 2 males, roadside, 2180m, grass heap trap, 2.VIII.2000, Hong-Zhang Zhou & Xiao-Dong Yu legg. ( IZ-CAS) .

Description. Head blackish; pronotum and abdomen dark brown; elytra light brown, but inner and posterior margins darker. Mandibles, maxillary palpi, first 4 antennomeres, and legs brownish. Length [average] male, 4.7 mm; female, 4.6 mm.

Male. Head ( Fig. 3A) with widest at eyes or temples. Disc densely punctate, nearly glabrous. Clypeus subquadrangular, as long as 1/3–2/5 head length, slightly depressed in basal part, surface glabrous and coriaceous, with scattered large punctures (same as those in vertex, but not so densely distributed) in anterior part; anterior margin emarginate, thickened, and forward a little beyond anterior margin of supra-antennal ridges. Epistomal suture with lateral portions incurved and running backward to level of anterior margin of eyes. Vertex densely punctate, slightly convex, posterior part well-limited from neck by occipital suture; two punctate paralateral sutures running anteriorly to middle level of head. Eyes with fine facets, longer than temples, and obviously protruding laterally. Temples punctate and moderately dilated. Occipital suture with middle portion present but feeble; nuchal ridge interrupted in middle, dorsal basal ridge present.

Mandible ( Fig. 3C) curved, with apices pointed; two denticles on inner edge. Antenna (type I) as long as head and pronotum together, with apical antennomere shorter than two preceding together.

Pronotum transverse, broadest at near anterior 1/3, wider than head. Disc 5-sulcate (as Fig. 1I), median sulcus and two paramedial sulci deep and punctate; two paralateral sulci shorter and oblique, each with punctate depression on lateral side. Lateral margins smooth, finely crenulate at prominent posterolateral angles. Elytra punctate but not rugose, without lateral longitudinal ridge.

Abdomen coriaceous and pubescent, broadest at segment V. Sternite VII ( Fig. 3E) with two considerably obsolete denticles near middle of posterior margin. Sternite VIII ( Fig. 3F) with subbasal ridge continuous in middle, with two neighbored triangular tubercles in middle but behind posterior margin, posterior margin protruding in middle into short lobe narrowed posteriorly, truncate at apex and with fine and curved transverse carina a little behind apical margin. Tergite X ( Fig. 3H) longer than wide, posterior margin emarginate in middle, with two lines of setae on haired posterior part.

Aedeagus ( Figs. 3K–O). Median lobe ovoid, with sclerite-like or membranous structures inside; apico-medial hook curved, apical part weakly upcurved and sharply pointed, at middle with transverse ridge (like process in lateral view); dorsal membranous area covering more than half of dorsum of median lobe but not across whole length. Paramere arm-like, with seta on apical 1/4, with triangular dorsal process pointing medially, that on right paramere curved and smaller than that on left.

Female. Head ( Fig. 3B) smaller than male; clypeus less protruding, with anterior margin not so emarginate as in male; temples shorter than eyes, not dilated; occipital suture present in middle. Mandible ( Fig. 3D) slenderer and shorter.

Abdominal sternite VII without denticles on posterior margin. Sternite VIII ( Fig. 3G) with posterior margin transparent, broadly rounded and slightly protruding in middle. Tergite X ( Fig. 3I) with posterior margin truncate.

Spermatheca ( Fig. 3J) ʋ- shaped, almost rightly angulate at middle, basal portion slightly bulbous, apex rounded.

Distribution. China (Shaanxi, Sichuan, Yunnan).

Etymology. The specific epithet is from the Chinese name (Pinyin) of the type locality “Ailaoshan” in Yunnan, China.

Remarks. The males of this species are different from the male O. dohertyi in combination of the narrower base of protruding lobe on posterior margin of sternite VIII and the emarginate posterior margin of tergite X, but what is more definitive is the asymmetric parameres and the pattern of internal sac seen from dorsal view. The delimitation of female O. ailaoshanicus sp. nov. and O. dohertyi is obscure so they are easily confused, but the basal portion of spermatheca of O. ailaoshanicus sp. nov. is a little more inflated.