Serangium drepnicum Xiao, 1992

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 : 51-52

Serangium drepnicum Xiao, 1992 Figs 2168-7394

Serangium drepnicum : Xiao & Li, 1992: 368; Ślipiński & Burckhardt, 2006: 50; Ren et al., 2009: 40.

Serangium lygacum : Pang et al., 2004: 66.

Diagnosis.

This species is close to Serangium japonicum in general appearance and genitalia, but can be distinguished as follows by indistinctly right paramere and flat and wide penis guide (Figs 70-71).

Description.

TL: 1.98-2.11mm, TW: 1.68-1.81mm, TH: 0.96-0.99mm, TL/TW: 1.16-1.18; PL/PW: 0.47-0.48; EL/EW: 0.94-0.96.

Body minute, hemispherical, dorsum strongly convex, shiny and glabrous (Fig. 21). Dorsum uniformly black. Head yellow, with basal frons black. Underside black, except prosternum orange. Legs reddish brown, except tibiae and tarsi yellow.

Head transverse and ventrally flattened, 0.41 × elytral width (HW/EW=1: 2.43); punctures on frons fine, separated by 1.0-4.0 times their diameter, with sparse setae; eyes moderately large and coarsely faceted, widest interocular distance 0.48 × head width. Antenna 9-segmented, terminal segment large, elongate oval and flat, apex angular.

Pronotum short and strongly transverse, 0.70 × elytral width (PW/EW=1: 1.43), covered in fine punctures associated with long sparse setae, separated by 1.0-3.0 times their diameter. Punctures on elytra fine and sparse, smaller than those on pronotum, separated by 2.0-4.0 times their diameter, with a row of evenly spaced setae along margin. Prosternum mat, with sparse setae. Mesoventrite glabrous and impunctate, with sparse setae. Metaventrite shiny and glabrous, basal half with distinctly median discrimen; punctures fine and sparse, separated by 2.0-5.0 times their diameter, with short sparse setae.

Male genitalia. Penis strongly curved in whole length, apex shortly narrowing and rounded, penis capsule indistinct (Fig. 69). Tegmen rather slender and strongly asymmetrical (Figs 70-71). Penis guide in ventral view flattened and elongate tongue-shape. Left paramere in ventral view indistinct bearing a few long setae, and right piece distinctly projecting, bearing a few long setae (Fig. 71). Penis guide in lateral view long and thin, straight, apex sharply pointed (Fig. 70).

Female genitalia. Genital plate elongate triangular with a rounded apex, sparsely hairy on the apical portion, stylus long, bearing few setae (Fig. 73). Spermatheca divided into two parts, one of which is somewhat globular with a feeble constriction and two small pinch-like projections, the other is long tubular, becoming slightly more slender distally (Fig. 72).

Types.

Holotype: 1♂, Hefeng, Hubei, 29°53.0'N, 110°2.38'E, ca 800m, 27.vii.1989, Xiao NN leg. (KIZ); Paratypes: 2♂♂, Lichuan, Hubei, 30°19.12'N, 108°55.35'E, ca 800m, 2.viii.1989, Xiao NN leg. (KIZ).

Other specimens examined.

China, Fujian: 1♂1♀, Sangang, Wuyi, 26°11.89'N, 119°15.97'E, ca 380m, 16.viii.1984, Pang XF leg.; Henan: 2♂♂1♀, Baiyushan, Songxian, 33°40.14'N, 110°50.56'E, ca 1520m, 1375m, 14.vii.2009, Wang XM et al. Leg.; 1♂, Baotianman, Neixiang, 33°32.15'N, 111°51.38'E, ca 1030m, 6.vii.2009, Wang XM Leg.

Distribution.

China (Fujian, Henan, Hubei).