Oxytelus bengalensis Erichson, 1840

Lü, Liang & Zhou, Hong-Zhang, 2012, 3576, Zootaxa 3576, pp. 1-63 : 17-18

Oxytelus bengalensis Erichson, 1840

( Figs. 1F, J; 5A–M)

Erichson, 1840: 789 (Type locality: Bengala); Cameron, 1930: 232 (subgenus Caccoporus ); Herman, 1970: 409; Hammond, 1975: 149, 155 ( China); Yuh, Paik, Kwon, and Lee, 1985: 227 ( Korea); Herman, 2001: 1422; Biswas, 2003: 238 (subgenus Caccoporus ; Sikkim); Ades and Kendrick, 2004: 53 ( Hong Kong); Smetana, 2004: 516 (subgenus Oxytelus ; distribution); Lee and Ahn, 2007: 22 ( Korea, Japan, China, and Oriental region).

Oxytelus bicolor Walker, 1859: 52 (Type locality: Ceylon); Scheerpeltz, 1933: 1094 (synonym of Oxytelus bengalensis ).

Oxytelus opacifrons Sharp, 1874: 93 (Type locality: Japan); Hammond, 1975: 155 (synonym of Oxytelus bengalensis ).

Material examined. 58 specimens, 28 males and 30 females. CHINA, Guangxi : 1 female, Longzhou, Sanlian , 350m, 13.VI.2000, Jun Chen leg., Oxytelus bengalensis Er. det. P.M.Hammond 1980 ( IZ-CAS) ; CHINA, Hubei: 1 male, Zigui, Maoping , 80m, 28.IV.1994, Wen-Zhu Li leg. ( IZ-CAS) ; CHINA, Jiangxi, Fuzhou : 1 male, 1 female, Huaxi, Zhanjiadi , 4.IX.2010, Jian-Hua Zhou & Xiao-Yun Huang leg. ( IZ-CAS) ; 1 female, Luohuxiang, Zhanjiacun , 7.VIII.2010, Yu-Lingzi Zhou leg. ( IZ-CAS) ; CHINA, Shanghai: 1 female, 18.VI.1932 ( IZ-CAS) ; CHINA, Shanghai, Zi-ka-wei [= Xujiahui] : 11 males, 20.V–13.X.1938 ( IZ-CAS) ; 1 male, 4.XI.1938, Oxytelus bengalensis Er. det. P.M.Hammond 1980 ( IZ-CAS) ; 1 male, 1 female, 13.XI.1938 ( IZ-CAS) ; 1 male, 21.IV.1939 ( IZ-CAS) ; 1 male, 3.X.1940 ( IZ-CAS) ; 18 females, 25.III–8.XI.1938 ( IZ-CAS) ; 1 female, 4.XI.1938, Oxytelus bengalensis Er. det. P.M.Hammond 1980 ( IZ-CAS) ; 1 female, 11.XI.1938 ( IZ-CAS) ; 1 female, 13.VIII.1939 (IZ- CAS) ; CHINA, Zhejiang: 1 female, Lin’an, Shunxi , 400m, cow dung, 9.VIII.2008, Yu-Lingzi Zhou leg. ( IZ-CAS) ; LAOS: 2 males, Vientiane Pr., Phou Khao Khouay NBCA, Ban Vangheua (= Khua ) school, 18º20.37'N 102º48.529'E, 775m, settlement near forests & rice fields, at light (UV & MV), 25–30.V.2008, A. Newton, M. Thayer et al. legg. ( FMNH) ; VIETNAM: 9 males, 3 females, Tonkin, Hoa-Binh , A. De Cooman leg., Oxytelus bengalensis Er. det. P.M.Hammond 1980 ( IZ-CAS) .

Redescription. Body brown to dark testaceous. Head pitchy, pronotum brown with dark posterior and lateral margins. Abdomen brownish. Length [average] male, 5.0 mm; female, 4.7 mm.

Male. Head ( Fig. 5A) far broader than long, widest at eyes. Disc sparsely punctate, less pubescent. Clypeus trapezoidal and not protruding, almost 1/3 head length, weakly depressed in anterior part (lower than anterior margin), surface impunctate and coriaceous; anterior margin truncate. Supra-antennal ridges moderately elevated upward. Epistomal suture, lateral portions running posterolaterally curved medially after posterior 1/3. Vertex almost flat, definitely distinguished from neck by middle portion of occipital suture; with mid-longitudinal suture distinct. Eyes with coarse facets, strongly convex and protruding laterally, twice or more longer than temples. Temples broadly rounded at posterolateral angles. Occipital suture arcuate in dorsal view; nuchal ridge present and visible in middle, dorsal basal ridge present.

Mandible ( Fig. 5C) stout, slightly curved; two denticles on inner edge near middle. Antenna (type I) a little shorter than or equal to head and pronotum together, with apical antennomere longer than preceding one.

Pronotum transverse, broadest at near anterior 1/3, slightly wider than or equal to head. Disc 3-sulcate (as Fig. 1H), but with two paramedial sulci and two paralateral depressions shallow; lateral margin even in front, crenulate behind, posterolateral angles rounded. Elytra ( Fig. 1J) punctate and rugose, and with lateral longitudinal ridge present.

Abdomen coriaceous and pubescent, broadest at segment IV or V. Sternite VII ( Fig. 5E) with posterior margin shortly produced in middle and weakly emarginate at apex. Sternite VIII ( Fig. 5F) broad, with subbasal ridge continuous in middle, with two deeply V-shaped ruptures near middle, forming large and subrectangular median plate, apical margin of median plate straight but a little produced in middle, in center of median plate with small tubercle, with seta at each posterolateral corner, with mid-longitudinal internal ridge on inside surface. Tergite X ( Fig. 5H) longer than wide, posterior margin truncate with a little notch in middle, posterior margin with two lines of setae on haired posterior part.

Aedeagus ( Figs. 5K–M). Median lobe oblong-ovoid, widest at middle; with membranous structures inside apical part of median lobe; apical orifice large; apico-medial hook flattened C-shaped in lateral view and bent at near middle, with apical tip pointed, basal process well developed and with round tip; dorsal membranous area not covering all dorsum but across length of median lobe. Paramere arm-like, with seta on apical 1/3 of apical arm and with highlighted zone nearby; apex pointed; with shallow furrow on basal arm.

Female. Head ( Fig. 5B) smaller than male. Eyes convex and protruding laterally beyond temples, temples almost invisible in lateral view. Mandible ( Fig. 5D) as long as in male but slenderer and shaper at apex.

Abdominal sternite VII with posterior margin straight and not modified. Posterior margin of sternite VIII ( Fig. 5G) broadly rounded but moderately produced in middle and furnished with small tooth on each side, a little processed between middle process and each of teeth. Tergite X ( Fig. 5I) scutiform, with posterior margin truncate.

Spermatheca ( Fig. 5J) slim and 3-bent.

Distribution. China (Gansu, Guangxi, Guizhou, Hong Kong, Hubei, Jiangsu, Jiangxi, Liaoning, Shanghai, Sichuan, Taiwan, Zhejiang); South Korea; Japan; Vietnam; Laos; Myanmar; Thailand; Malaysia; Singapore; Bangladesh; Sri Lanka; Nepal; Pakistan; India.

Remarks. O. nigriceps and O. ruptus are two species that are probably confused with O. bengalensis , for their difference please see the key to species and remarks under the species O. nigriceps .