Oxytelus lividus Motschulsky, 1857

Lü, Liang & Zhou, Hong-Zhang, 2012, 3576, Zootaxa 3576, pp. 1-63 : 24-26

Oxytelus lividus Motschulsky, 1857

( Figs. 1B, D, L; 8A–O)

Motschulsky, 1857: 503 (Type locality: Indes orientales); Cameron, 1930: 231 (subgenus Caccoporus ; characters; Ceylon; Java; Shanghai); Herman, 1970: 410; Hammond, 1975: 149, 156 (distribution); Herman, 2001: 1440; Smetana, 2004: 517 (subgenus Oxytelus ; distribution).

Oxytelus gigantulus Fauvel, 1904: 99 (Type locality: Siam: Bangkok; Java; Sumatra: Deli ); Hammond, 1975: 156 (synonym of Oxytelus lividus ).

Material examined. 21 specimens, 12 males and 9 females. CHINA, Hainan : 4 males, 5 females, Wuzhishan, Shuiman , 600m, light trap, 8.V.2007, Zong-Yi Zhao leg. ( IZ-CAS) ; 1 female, same data as previous except: 12.V.2007 ( IZ-CAS) ; 1 male, Wuzhishan , 11.IV.2010, light trap, Tian-Yang Jiao leg. ( IZ-CAS) ; 1 female, Wuzhishan , near village tavern, 708m, light trap, 11.IV.2010, Kui-Yan Zhang leg. ( IZ-CAS) ; 1 male, Baisha, Yinggeling , light trap, 5.V.2009, Ting-Yu Hu leg. ( IZ-CAS) ; 2 males, same data as previous except: 6.V.2009, Xin- Lei Huang leg. ( IZ-CAS) ; CHINA, Yunnan: 1 male, 1 female, Xishuangbanna [=Sibsongbanna], Yunjinghong , 900m, 25.VI.1958, Yi-Ran Zhang leg., Oxytelus lividus Motsch. det. P.M.Hammond 1980 ( IZ-CAS) ; 1 male, Hot Spring , 26.III.1982, Pei-Yu Yu leg. ( IZ-CAS) ; 1 male, Dehongzhou, Yingjiang, Tongbiguanxiang , Jinzhuzhai , 1418m, light trap, 4.VI.2008, Hong-Liang Shi leg. ( IZ-CAS) ; LAOS: 1 male, Phungsoli [= Phongsali], Gnoi-ou , 1700m, 23/ 25.III.2007, Jing-Ke Li leg. ( FMNH) ; VIETNAM: 1 female, Cao Bang, Ba B ễ National Park , 28.III–7.IV.1997, A. Monastyrskii leg. ( FMNH) .

Redescription. Body khaki to dark ocher colored, flattened, cuticle rough. Lateral parts of pronotum, lateral and posterior margins of elytra yellow, extreme margins of pronotum and bases of elytra black. Mandibles testaceous or lateritious with black margins. Antennomeres 1 – 3, maxillary palpi, and legs testaceous. Abdomens along middle with longitudinal dark zone, with subbasal and basolateral ridges blackish. Length [average] male, 6.1 mm; female, 5.5 mm.

Male. Head ( Figs. 1D; 8A) subtrapezoidal and roughly coriaceous, widest at eyes. Disc rugose on basal half, not pubescent. Clypeus reversed trapezoidal and forward barely beyond anterior margin of supra-antennal ridges, as long as near 1/4 head length, with widest at anterior margin, slightly depressed in basal part, surface glabrous, impunctate and coriaceous; anterior margin truncate, with four denticles. Epistomal suture with lateral portions straight but lightly incurved at posterior end, running posteromedially to level of anterior 1/4 of head. Vertex slightly convex but flat anteriorly, posterior part not well-limited and continuous with neck in median; midlongitudinal suture obvious. Eyes with coarse facets, longer than temples (less than twice), convex, protruding laterally beyond temples. Temples dilated posterolaterally. Occipital suture with middle portion absent; nuchal ridge present but interrupted in middle and extending to lateral plate, dorsal basal ridge present.

Mandible ( Fig. 8C) stout, falciform, strongly incurved; two denticles on inner edge, one near middle and one near apex. Antenna (type I) of length a little shorter than head and pronotum together, with apical antennomere elongated as long as three preceding together.

Pronotum transverse, broadest at near anterior 1/4, as wide as head. Disc rugose and 3-sulcate (as Fig. 1H), median sulcus and two paramedial sulci deep and punctate; two paralateral depressions shallow, striate; lateral margin finely crenulate across length. Elytra rough and rugose, without lateral longitudinal ridge.

Abdomen coriaceous and pubescent, broadest at segment V. Sternite VII ( Fig. 8E) with strongly sclerotized area anterior to basal ridge; posterior margin with deep and acute emargination in middle, on each side with process. Sternite VIII ( Fig. 8F) strongly sclerotized in area anterior to basal ridge, with subbasal ridge feeble or discontinuous near middle; posterior margin deeply bi-emarginate forming three lobes; median lobe dark and with mid-longitudinal internal ridge, narrowed posteriorly and attached by finger-formed projection at either side of base and furnished with a pair of short setae near apex, apex weakly emarginate and behind with short transverse carina; lateral lobes triangular covered with long setae. Tergite X ( Fig. 8H) longer than wide, anterior margin straight, posterior margin bi-emarginate, with two lines of setae on haired posterior part.

Aedeagus ( Figs. 8K–O). Median lobe oblong-ovoid, weakly constricted at apical 1/4; with sclerite-like or membranous structures in apical part of median lobe; apico-medial hook bent at near middle, with apex alatiform, on each lateral margin with two denticles; dorsal membranous area not covering all dorsum and not across length of median lobe. Parameres arm-like, with hand-like apex enlarged and trifurcate (with three finger-formed projections), on ventral projection situated with long seta, and small process on lateral surface.

Female. Head ( Figs. 1B; 8B) subtriangular, smaller than male; clypeus subquadrate, as long as 1/3 head length, with widest at posterior 1/3, flat and not depressed in basal part; anterior margin but truncate in middle; epistomal suture with lateral portions incurved; vertex flat, even with clypeus, posterior part well-limited and separated from neck by occipital suture; eyes over 4 times length of temples, convex and protruding laterally beyond temples, covering most of lateral surface of head; occipital suture with median portion present and obvious. Mandible ( Fig. 8D) slender, incurved but not so strongly as male, with transverse ridge across in middle.

Abdominal sternite VII with posterior margin straight. Sternite VIII ( Fig. 8G) with posterior margin broadly rounded, but protruding in middle. Tergite X ( Fig. 8I) similar to male, but with anterior margin rounded.

Spermatheca ( Fig. 8J) comma-shaped, basal portion strongly bulbous, constricted at middle, with apex sharply pointed; basal half of basal portion membranous and furnished with long duct of stable conformation.

Distribution. China (Hainan, Shanghai, Yunnan); Sri Lanka; India; Myanmar; Malaysia; Thailand; Vietnam; Indonesia; Laos.