Serangium japonicum Chapin, 1940

Wang, Xing-Min, Ren, Shun-Xiang & Chen, Xiao-Sheng, 2011, A review of the genus Serangium Blackburn (Coleoptera, Coccinellidae) from China, ZooKeys 134, pp. 33-63 : 37-40

Serangium japonicum Chapin, 1940 Figs 1-5, 7, 91325-2992

Serangium japonicum Chapin, 1940: 269; Miyatake, 1961b: 140-142; Sasaji, 1971: 55; Pang & Mao, 1979: 28; Cao, 1992: 106; Ślipiński & Burckhardt, 2006: 50; Ren et al., 2009: 40.

Diagnosis.

This species can be identified by its completely black body with yellowish brown anterior angles of pronotum, and spatulately elongate terminal antenna segment, flattened and elongate tongue-shape penis guide in ventral view. (Fig. 28).

Description.

TL: 1.60-2.08mm, TW: 1.40-1.98mm, TH: 0.82-1.02mm, TL/TW: 1.14-1.15; PL/PW: 0.52-0.53; EL/EW: 0.94-0.98.

Body minute, hemispherical, dorsum strongly convex, shiny and glabrous (Fig. 13). Dorsum uniformly black, except anterior angles of pronotum yellowish brown. Head yellowish brown. Underside reddish brown, except metaventrite dark brown. Legs yellowish brown (Fig. 1).

Head transverse and ventrally flattened, 0.40 × elytral width (HW/EW=1: 2.50); punctures on frons fine and sparse, separated by 1.5-6.0 times their diameter, with short sparse setae (Fig. 2); eyes moderately large and coarsely faceted, widest interocular distance 0.45 × width of head (Fig. 2). Antenna 9-segmented, terminal segment large, spatulately elongate (Fig. 5).

Pronotum short and strongly transverse, 0.58 × elytral width (PW/EW=1: 1.72), densely covered in fine punctures associated with long sparse setae, punctures slightly larger than those on head, separated by 1.0-3.0 times their diameter. Punctures on elytra fine and sparse, similar to those on pronotum, with a few long setae at humeral angles and a row of evenly spaced setae along margin. Prosternum shiny, glabrous and impunctate with sparse setae. Mesoventrite small, transverse, surface mat weakly fu rrowed, sparsely setae. Metaventrite shiny, basal half with distinctly median discrimen; punctures around median discrimen very large and dense, with short thick setae, and on other parts fine and sparse, separated by 2.0-6.0 times their diameter, with short sparse setae.

Male genitalia. Penis strongly curved in whole length, apex shortly narrowing and rounded, penis capsule indistinct (Fig. 26). Tegmen rather slender and strongly asymmetrical (Figs 27-28). Penis guide in ventral view flattened and elongate tongue-shape. Left paramere in ventral view flat and short bearing a few long setae, and right piece short but distinctly projecting, bearing a few long setae (Fig. 28). Penis guide in lateral view long and thin, almost straight, apex pointed. Right paramere in lateral view about 1/2 of penis guide (Fig. 27).

Female genitalia. Genital plate elongate triangular with a rounded apex, sparsely hairy on the apical portion, stylus rather long, bearing few setae (Fig. 29). Spermatheca divided into two parts, one of which is somewhat globular with a feeble constriction and two small pinch-like projections, the other is tubular, becoming slightly more slender distally (Fig. 29).

Specimens examined.

China, Anhui: 4♂♂1♀, Guniujiang National Natural Reserve, Shitai, 29°58.97'N, 117°39.51'E, ca 490m, 24.ix.2010, Wang XM et al. leg.; Fujian: 6♂♂6♀♀, Fuzhou, 26°4.66'N, 119°22.05'E, ca 30m, 15.vi.1983, Tang YQ leg.; 1♂3♀♀, Shaowu, 27°20.56'N, 117°28.75'E, ca 220m, 24.viii.1984, Pang XF leg.; Guangdong: 4♂♂4♀♀, Gaoyao, 23°01.97'N, 112°26.41'E, ca 40m, 4.xii. 1985, Jiang N. leg.; 1♂, Shipai Country, Guangzhou, 23°7.85'N, 113°20.49'E, ca 5m, 29.vii.29, Ren SX leg.; 2♂♂2♀♀, Chenjia, Yangshan, 24°45.51'N, 112°51.68'E, ca 310m, 9.vii. 1996, Tian MY leg.; 4♂♂5♀♀, Shimentai Mountain, Yingde, 24°23.83'N, 113°17.24'E, ca 550m, 3.xi.2004, Wang XM et al. leg.; 2♂♂, campus of SCAU, 23°9.49'N, 113°21.07'E, ca 30m, viii.2008, Wang XM leg.; 1♂, Qinshuigu, Nanling Mountain, Shaoguan, 24°54.95'N, 113°6.46'E, ca 560m, 29. ix.2004, Wang XM leg.; Guangxi: 9♂♂10♀♀, Guilin, 25°13.93'N, 110°15.20'E, ca 300m, 23.ix.1987, Pang XF leg.; 1♀, Hongqilinchang, Shiwandashan Mountian, Shangsi, 21°54.45'N, 107°54.57'E, ca 350m, 10. xi. 2004, Lv XB leg.; 1♂, Maoershan Mountain, Guilin, 25°49.51'N, 111°01.07'E, ca 440m, 16.x. 2004, Wang XM leg.; Guizhou: 1♀, Huaxi, Guiyang, 26°24.60'N, 106°40.07'E, ca 1120m, 11.viii.1987, Peng XF leg.; 12♂♂17♀♀, Suoluo National Natural Preserve, Chishui, 28°26.42'N, 105°59.80'E, ca 430m, 9.viii. 1994, Tian MY leg.; 1♂1♀, Xifeng, 27°5.35'N, 106°44.59'E, ca 1100m, 9.viii.1997. Peng ZQ leg.; 2♂♂3♀♀, Dongtang, Libo, 25°17.28'N, 108°0.94'E, ca 730m, 15.x.2008, Liang JB leg.; 2♂♂, Leigongshan Moutain, Leishan, 26°22.71'N, 108°11.03'E, ca 1500m, 30.vii.1997, Peng ZQ leg.; 1♂3♀♀, Sanchahe, Libo, 25°24.53'N, 108°5.22'E, ca 730m, 19.x.2008, Liang JB leg.; Hainan: 2♂♂1♀, Jianfengling, 18°44.49'N, 108°51.85'E, ca 840m, 3.xi.1989, Ren SX leg.; 2♂♂, Jianfengling, 18°44.49'N, 108°51.85'E, ca 840m, ix.1995, Peng ZQ leg.; Hubei: 1♂1♀, Wudangshan Mountain, Shiyan, 32°24.50'N, 111°1.31'E, ca 1090m, 17.vii.1997, Peng ZQ leg.; Hunan: 1♂, Zhubotang, Yiyang, 28°29.07'N, 112°26.70'E, ca 50m, 18.viii.2001, Peng ZQ leg.; Sichuan: 2♂♂3♀♀, Zhon gxian, 30°18.78'N, 107°59.80'E, ca 360m, 24.viii.1989, Ren SX leg.; 1♂1♀, Kaixian, 31°9.55'N, 108°24.26'E, ca 330m, 25.vi.1989, Ren SX leg.; 3♂♂4♀♀, Jiulidi, 30°42.80'N, 104°3.16'E, ca 500m, 27.vi.1983, Pang XF leg.; 4♂♂4♀♀, Puge, 27°35.32'N, 102°25.98'E, ca 2000m, 15.ix.2007, Wang XM leg.; 10♂♂16♀♀, Pangzhihua, 26°36.69'N, 101°35.35'E, ca 1200m, 1400m, 16.ix.2007, Wang XM leg.; 1♂1♀, Miyi, 26°50.01'N, 102°3.86'E, ca 1150m, 30.ix.2000, Peng ZQ leg.; Zhejiang: 4♂♂6♀♀, Cixi, 30°8.72'N, 121°18.91'E, ca 70m, 18.x.1988, Yu GY leg.; Yunnan: 2♂♂2♀♀, Ailaoshan, Mountain, Jingdong, 24°25.41'N, 101°3.80'E, ca 2000m, 1.x.2006, Wang XM et al. leg.; 1♂, Yingjiang, 24°36.53'N, 97°43.95'E, ca 1500m, 20.ix.2006, Wang XM leg.

Distribution.

China (Anhui, Chongqing, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hubei, Hunan, Shanghai, Shaanxi, Sichuan, Taiwan, Zhejiang, Yunnan); Japan.