Serangium leigongicus 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 : 45

Serangium leigongicus Wang & Ren sp. n. Figs 1852-5593

Diagnosis.

This species is similar to Serangium centrale in male genitalia, but it is easily distinguished from the latter by minute body size, slender penis, shorter penis capsule, apex of penis guide with a triangular process at left side (Figs 47-49, 53-55).

Description.

TL: 1.58mm, TW: 1.35mm, TH: 0.40mm, TL/TW: 1.17; PL/PW: 0.45; EL/EW: 0.93.

Body minute, hemispherical, dorsum strongly convex, shiny and glabrous (Fig. 18). Head brown, except frons yellowish brown. Pronotum and scutellum dark brown. Elytra burgundy, with a dark area in the middle of suture. Underside dark red. Legs yellowish brown.

Head transverse and ventrally flattened, 0.44 × elytral width (HW/EW=1: 2.28); punctures on frons moderated large, separated by 0.5-1.5 times their diameter, with sparse setae; eyes moderately large and coarsely faceted, widest interocular distance 0.56 × head width. Antenna 9-segmented, terminal segment large, elongate oval and flat, apex angular.

Pronotum short and strongly transverse, 0.76 × elytral width (PW/EW=1: 1.32), sparsely covered in fine punctures associated with moderately dense setae, punctures smaller than as those on head, separated by 1.0-3.0 times their diameter. Punctures on elytra fine, similar as those on pronotum, separated by 2.0-4.0 times their diameter, with a row of evenly spaced setae along margin. Prosternum mat, shagreened and impunctate. Mesoventrite glabrous. Metaventrite shiny and glabrous, without median discrimen; punctures fine and sparse, separated by 2.0-5.0 times their diameter, slightly larger and denser in center.

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 distinct inner and outer processes (Fig. 53). Tegmen strongly asymmetrical and extremely complicate (Figs 54-55). Penis guide relatively short with a distinctly pointed apex, a small triangular process at left side and a prominence at left side near the apex, bearing dense setae dorsally and ventrally (Fig. 55). Right lateral lobe of tegmen short, bearing spaesrly setae. Left lateral lobe of tegmen slightly longer than right, without any setae (Fig. 55). Basal piece of tegmen with a long process.

Female genitalia. Unknown.

Type materials.

Holotype: 1♂, China, Guizhou: Xiaodanjiang, Leigongshan National Natural Reserve, Leishan, 26°26.53'N, 108°15.45'E, ca 1160m, 12.x.2008, Liang JB leg. (SCAU).

Distribution.

China (Guizhou).

Etymology.

The specific epithet is named after Leigongshan, the type locality of this ladybird.