Serangium trimaculatum 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 : 42-43

Serangium trimaculatum Wang & Ren sp. n. Figs 1642-4593

Diagnosis.

This is a very distinctive species having three black spots on the elytra (Fig. 16). The male genitalia are similar to Serangium punctum , but can be distinguished from latter by long left paramere and apexof penis guide (Figs 44-45).

Description.

TL: 2.09-2.21mm, TW: 1.75-1.88mm, TH: 0.79-0.89mm, TL/TW: 1.18-1.20; PL/PW: 0.43-0.47; EL/EW: 0.89-0.93.

Body minute, hemispherical, dorsum strongly convex, shiny and glabrous (Fig. 16). Head orange, pronotum and scutellum orange. Elytra orange, with three black spots: two on the center of elytra and one on the middle of suture. Underside yellowish brown, except pro-, meso- and metaventrites black. Legs yellowish brown.

Head transverse and ventrally flattened, 0.38 × elytral width (HW/EW=1: 2.65); punctures on frons moderated large, separated by 0.5-1.5 times their diameter, with long sparse setae; eyes moderately large and coarsely faceted, widest interocular distance 0.58 × 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), sparsely covered in fine punctures associated with long sparse setae, punctures smaller than those on head, separated by 1.5-4.0 times their diameter. Punctures on elytra very fine and sparse, similar to those on pronotum, with a row of evenly spaced setae along margin. Prosternum glabrous, punctures fine and sparse, separated by 2.0-3.0 times their diameter, with a few short setae. Mesoventrite small, transverse, surface shiny and impunctate. Metaventrite shiny, basal half with distinctly median discrimen; punctures inconspicuous, with short sparse setae.

Male genitalia. Penis long and slender, strongly curved in whole length, apical half of siphon strongly narrowing apical, and apex very thin and sharply pointed, penis capsule broadening basally and with a distinct inner process (Fig. 43). Tegmen strongly asymmetrical and extremely complicate (Figs 44-45). Penis guide moderatedly elongate, with a finger-like apex, a small prominence at right side near the apex, bearing many distinct hairs dorsally (Fig. 45). Right lateral lobe of tegmen short, bearing dense setae. Left lateral lobe of tegmen relatively long, rounded apical without any setae (Fig. 45). Basal piece of tegmen with a long process.

Female genitalia. Unknown.

Type materials.

Holotype: 1♂, China, Sichuan: Heizhugou Forest Park, Ebian, 29°2.51'N, 103°0.34'E, ca 1900m, 22.ix.2007, Wang XM leg. (SCAU). Paratypes (1): Yunnan: 1♂, Heiwadi Town, Gongshan, 27°46.48'N, 98°36.16'E, ca 2020m, 19.vii.2010, Wang XM leg. (SCAU).

Distribution.

China (Sichuan, Yunnan).

Etymology.

The specific epithet formed from the Latin prefixion tri- and noun macula referring to elytra with three spots.