Oxytelus abiturus, Lü & Zhou, 2012

Lü, Liang & Zhou, Hong-Zhang, 2012, 3576, Zootaxa 3576, pp. 1-63 : 10-12

Oxytelus abiturus sp. nov.

( Figs. 2A–N)

Type material. Holotype: male, CHINA, Yunnan, Lijiang, Yongshengxian , 2180m, by heap trap, 2.VIII.2000, Hong-Zhang Zhou & Xiao-Dong Yu leg. ( IZ-CAS) . Paratypes: 3 males, 9 females, same data as holotype (IZ- CAS); CHINA, Sichuan : 1 male, Huilixian, Yimen, 29.VII.1974, Yin-Heng Han leg. ( IZ-CAS); CHINA, Yunnan : 1 male, Chuxiong, Lufeng, Guangtong, from weed heap in crop field, 28.VII.2006, Xiao-Yan Li leg. ( IZ-CAS) ; 1 female, same data as previous except: Kai Shi leg. ( IZ-CAS) .

Description. Body blackish or dark brown. Maxillary palpi, first 4 antennomeres, elytra, and legs light brown. Length [average] male, 4.0 mm; female, 4.3 mm.

Male. Head ( Fig. 2A) with widest at eyes or temples. Disc densely punctate, nearly glabrous. Clypeus transverse, as long as 1/4 head length, flat, surface glabrous, coriaceous, and with few punctures, protruding a little beyond anterior margin of supra-antennal ridges; anterior margin truncate or slightly emarginate. Epistomal suture with lateral portions broadly incurved and running backward to level of anterior margin of eyes. Vertex densely punctate, slightly convex; mid-longitudinal suture fine and obvious, two punctate paralateral sutures running anteriorly to middle level of eyes. Eyes with fine facets, almost as long as temples. Temples broadly rounded and dilated. Occipital suture with middle portion obsolete and continually punctate but obvious in some cases; nuchal ridge interrupted in middle, dorsal basal ridge present.

Mandible ( Fig. 2C) robust and curved; two denticles on inner edge, one near middle and one at apical 1/4. Antenna (type I) roughly as long as head and pronotum together, with apical antennomere a little shorter than two preceding together.

Pronotum transverse, broadest at about anterior 1/3, broader than head. Disc 5-sulcate (as Fig. 1I), median sulcus and two paramedial sulci long, deep, and punctate; two paralateral sulci short and deep. Lateral margins even in front and crenulate behind, posterolateral angles prominent. Elytra punctate but not rugose, without lateral longitudinal ridge.

Abdomen coriaceous and pubescent, broadest at segment V. Sternite VII ( Fig. 2E) with two pointed denticles near middle of posterior margin, between which weakly and broadly emarginate. Sternite VIII ( Fig. 2F) with subbasal ridge continuous and straight in middle, with posterior margin protruding into long subtriangular lobe, apex emarginate in middle and with fine and transverse carina a little behind apical margin. Tergite X ( Fig. 2H) longer than wide, posterior margin truncate or slightly emarginate, with two lines of setae on haired posterior part.

Aedeagus ( Figs. 2K–N). Median lobe oblong-ovoid, with sclerite-like or membranous structures inside; apicomedial hook with apical part short, with transverse ridge (like process in lateral view) a little behind apex; dorsal membranous area covering most of dorsum of median lobe but not across whole length. Paramere arm-like, with ventrally directed seta at half of apical arm.

Female. Head ( Fig. 2B) smaller than male, narrower than pronotum; clypeus protruding beyond anterior margin of supra-antennal ridges as much as in male, with anterior margin truncate or slightly emarginate; temples shorter than eyes, not dilated; mid-longitudinal suture invisible or very feeble, occipital suture continuous in middle. Mandible ( Fig. 2D) not so robust as in male.

Abdominal sternite VII without denticles on posterior margin. Sternite VIII ( Fig. 2G) with posterior margin broadly rounded but shortly protruding in middle. Tergite X ( Fig. 2I) with anterior margin narrower and posterior margin truncate or a little sinuate.

Spermatheca ( Fig. 2J) ʋ- shaped, almost sharply angulate at middle, basal portion slightly inflated, apex rounded.

Distribution. China (Sichuan, Yunnan).

Etymology. The specific epithet is derived from the future active participle of the Latin verb abire which means “to leave”.

Remarks. This species can be separated from O. lucens , O. dohertyi and O. ailaoshanicus sp. nov. by the transverse clypeus with truncate anterior margin, in addition to the characters on male sternites VII and VIII.