Microserangium deltoides Wang & Ren

Wang, Xingmin, Ślipinski, Adam & Ren, Shunxiang, 2013, The genus Microserangium Miyatake (Coleoptera, Coccinellidae) from China, ZooKeys 359, pp. 13-33 : 26-28

Microserangium deltoides Wang & Ren sp. n. Figures 18, 69-76, 93

Diagnosis.

This species is similar to Microserangium okinawense , but can be separated from the latter by the inconspicuous inner arm of the penis capsule and triangular penis guide (Figs 70-73). In Microserangium okinawense , the inner arm of the penis capsule is small but distinct, and the penis guide is almost triangular with inner and outer margins arcuate (Figs 78-81).

Description.

TL: 1.19-1.35mm, TW: 1.02-1.15mm, TH: 0.66-0.76mm, TL/TW: 1.16-1.17; PL/PW: 0.38-0.44; EL/EW: 0.87-1.00; HW/TW: 0.43; PW/TW: 0.71.

Body shiny and glabrous (Fig. 18). Dorsum uniformly black, anterior corner of pronotum yellowish brown. Head dark brown, except frons medium brown. Underside dark brown, legs yellowish brown, tibiae and tarsi yellow.

Head transverse and ventrally flattened; frontal punctures fine and sparsely distributed, 1.0-2.0 diameters apart, with long sparsely distributed setae; eyes round, large and coarsely faceted, widest interocular distance 0.40 × width of head. Antennal club oval and flat, apex blunt (Fig. 75).

Pronotum strongly transverse, anterior corners inconspicuous and blunt, mat and shagreened. Pronotal disk with densely distributed large and fine punctures both as sociated with long sparsely distributed setae, the finer punctures slightly deeper than the large ones. Elytra smooth and shiny, with long sparsely distributed setae along margins, punctures extremely fine and inconspicuous. Prosternum mat and impunctate. Mesoventrite transverse, very short, surface mat, weakly furrowed. Metaventrite shiny and glabrous, punctures fine and sparsely distributed, 1.5-3.0 diameters apart. Meso- and metatibiae distinctly angulate externally beyond middle, almost triangular; tarsus with 3 tarsomeres (Fig. 76).

Male genitalia. Penis strongly curved along entire length, apex narrowed and pointed, penis capsule with large outer arm and inconspicuous inner one (Figs 70-71). Tegmen slender and asymmetrical. Penis guide in lateral view slender and straight, apex pointed (Fig. 72), in ventral view flat and triangular, apex pointed (Fig. 73). Parameres conspicuous, small (Fig. 72).

Types.

Holotype ♂: China, Guangxi: Pinglongshan, Fulong, Shangsi, 21°49.88'N, 107°56.79'E, ca 160m, 29.vii.2005, Wang XM leg. Paratypes (28): Guangxi: 1♂4♀♀, same data to holotype; 6♂♂3♀♀, Fulong, Shiwandashan, Shangsi, 21°49.88'N, 107°56.79'E, ca 160m, 7.xi.2004, Wang XM et al.leg.; 2♂♂11♀♀, Hongqilinchang, Shiwandashan, Shangsi, 21°52.79'N, 107°55.05'E, ca 900m, 7.xi.2004, Wang XM et al.leg.; Guizhou: 1♂, Xianheping, Anlong, 24°58.66'N, 105°36.45'E, ca 1500m, 12.ix.2007, Wang XM leg.

Distribution.

China (Guangxi, Guizhou).

Etymology.

The specific epithet is formed from the Latin adjective deltoides, referring to the triangular penis guide.