Serangium magnipunctatum Wang & Ren

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 : 41-42

Serangium magnipunctatum Wang & Ren sp. n. Figs 1536-4192

Diagnosis.

This species is similar to Serangium clauseni in general appearance and male genitalia, from which it differs in its dorsal color pattern, elytra with a few large inner punctures at basal margins and along elytral suture (Fig. 15). The male genitalia are also diagnostic: penis is slightly thinner than Serangium clauseni (Figs 31, 37), paramere about 1/3 of penis guide which is 2/3 in Serangium clauseni (Figs 32, 39).

Description.

TL: 2.09-2.18mm, TW: 1.75-1.85mm, TH: 1.02-1.05mm, TL/TW: 1.18-1.20; PL/PW: 0.47-0.49; EL/EW: 0.96.

Body minute, hemispherical, dorsum strongly convex, glabrous (Fig. 15). Head yellow, pronotum reddish brown to black, except light-colored anterior angles and basal margin. Scutellum reddish brown to black. Elytra red to black, sometimes elytra black with median part red. Underside reddish brown and legs yellow.

Head transverse and ventrally flattened, 0.42 × elytral width (HW/EW=1: 2.41); punctures on frons fine and conspicuous, separated by 1.5-5.0 times their diameter, with short sparse setae; eyes moderately large and coarsely faceted, widest interocular distance 0.45 × head width. Antenna 9-segmented, terminal segment large, spatulately elongate.

Pronotum short and strongly transverse, 0.72 × elytral width (PW/EW=1: 1.39), sparsely covered in fine punctures associated with long sparse setae, punctures smaller than those on head, separated by 2.0-4.0 times their diameter. Elytra with a few large inner punctures at basal margins and two rows of large punctures along elytral suture. Pro- and mesoventrites mat and weakly furrowed, with short sparse setae. Metaventrite shiny and glabrous, basal half with distinctly median discrimen; punctures around median discrimen large and dense, with short thick setae.

Male genitalia. Penis strongly curved in whole length, apex shortly narrowing and rounded, penis capsule indistinctly (Fig. 37). Tegmen rather slender and strongly asymmetrical (Figs 38-39). Penis guide in ventral view flattened and tongue-shape (Fig. 39). Left paramere in ventral view very short bearing a few long setae, and right piece short and stout, distinctly projecting, bearing a few long setae (Fig. 39). Penis guide in lateral view thin and straight, apex pointed. Right paramere in lateral view short, about 1/3 of penis guide (Fig. 38).

Female genitalia. Genital plate elongate triangular with a rounded apex, sparsely hairy on the apical portion, stylus long, bearing few setae (Fig. 41). 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. 40).

Type materials.

Holotype: 1♂, China, Yunnan: Jiluoshan, Xishuangbanna, 21°58.78'N, 101°7.79'E, ca 1020m, 28.iv.2008, Wang XM leg. (SCAU). Paratypes (19): Guangxi: 1♂, Guilongshan, Napo, 23°21.63'N, 105°41.74'E, ca 880m, 4.viii.2005, Wang XM leg. (SCAU); Yunnan: 2♀♀, Mengxing, Mengla, 21°52.63'N, 101°27.07'E, ca 690m, 1000m, 13.v.2008, Wang XM leg. (SCAU); 4♂♂12♀♀, Lincang, 23°52.56'N, 100°5.88'E, ca 1460m, 27.viii.2005, Wang XM et al. leg. (2♂♂6♀♀ SCAU, 2♂♂6♀♀ IOZ).

Distribution.

China (Guangxi, Yunnan).

Etymology.

The specific epithet is formed from the Latin adjective magnus and punctatus, referring to elytra with large inside punctures.