Serangium clauseni (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 : 40-41

Serangium clauseni (Chapin, 1940) Figs 1430-3592

Catana clauseni Chapin, 1940: 267; Miyatake, 1961b: 139; Ren et al., 2009: 36.

Serangium clauseni : Ślipiński & Burckhardt, 2006: 50.

Diagnosis.

This species can be identified by the unique dorsal color pattern and spatulately elongate terminal antenna segment (Fig. 14). The male genitalia are similar to Serangium japonicum , but it can be distinguished from latter as follow: penis is stout (Fig. 31), penid guide in ventral view wider than latter (Fig. 33) and right paramere in lateral view is stout and 2/3 of penid guide (Fig. 32).

Description.

TL: 1.95-2.24mm, TW: 1.66-1.98mm, TH: 0.89-1.15mm, TL/TW: 1.13-1.17; PL/PW: 0.44-0.47; EL/EW: 0.93-0.95.

Body minute, hemispherical, dorsum strongly convex, shiny and glabrous (Fig. 14). Head orange to brown, pronotum reddish to dark brown, except light-colored anterior angles. Scutellum reddish to dark brown and ground color of elytra reddish to dark brown, with a large reniform spot on each elytron bright castaneous. Underside yellowish to reddish brown, except prosternum dark brown. Legs yellowish brown.

Head transverse and ventrally flattened, 0.41 × elytral width (HW/EW=1: 2.45); punctures on frons moderated large, separated by 1.5-4.0 times their diameter, with short sparse setae; eyes moderately large and coarsely faceted, widest interocular distance 0.37 × head width. Antenna 9-segmented, terminal segment large, spatulately elongate.

Pronotum short and strongly transverse, 0.68 × elytral width (PW/EW=1: 1.46), sparsely covered in moderated large punctures associated with long sparse setae, punctures similar to those on head, separated by 2.0-6.0 times their diameter. Punctures on elytra very fine and sparse, smaller than those on pronotum, separated by 3.0-8.0 times their diameter, with a row of evenly spaced setae along margin. Prosternum shiny and glabrous, with sparse punctures and setae. Mesoventrite small, transverse, surface mat, weakly furrowed. Metaventrite shiny, basal half with distinctly median discrimen; punctures around median discrimen very large and dense, with short thick setae, and on other parts moderated large, sparse, separated by 2.0-5.0 times their diameter, with short sparse setae.

Male genitalia. Penis stout, strongly curved in whole length, apex narrowing and rounded, penis capsule indistinctly (Fig. 31). Tegmen slender and strongly asymmetrical (Figs 32-33). Penis guide in ventral view flattened and tongue-shape, slightly wider and shorter than Serangium japonicum (Fig. 33). 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. Penis guide in lateral view thin and straight, apex pointed. Right paramere in lateral view stout, about 2/3 of penis guide (Fig. 32).

Female genitalia. Genital plate elongate triangular with a rounded apex, sparsely hairy on the apical portion, stylus rather long, bearing few setae (Fig. 35). 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. 34).

Specimens examined.

China, Hainan: 9♂♂23♀♀, Wuzhishan, 18°47.07'N, 109°31.97'E, ca 700m, 3.v.1996, Peng ZQ leg.; 4♂♂3♀♀, Wushi, 19°8.99'N, 109°53.84'E, ca 320m, 14.vii.1999, Peng ZQ leg.

Distribution.

China (Hainan).