Microserangium dactylicum Wang & Ren

Wang, Xingmin, Ślipinski, Adam & Ren, Shunxiang, 2013, The genus Microserangium Miyatake (Coleoptera, Coccinellidae) from China, ZooKeys 359, pp. 13-33 : 29-30

Microserangium dactylicum Wang & Ren sp. n. Figures 20, 85-93

Diagnosis.

This species is similar to Microserangium bacthaiensis Hoàng, 1978 in morphological characters and male genitalia, but it can be distinguished by the different shape of the penis guide.

Description.

TL: 1.25-1.38mm, TW: 1.12-1.22mm, TH: 0.76-0.82mm, TL/TW: 1.12-1.14; PL/PW: 0.42-0.44; EL/EW: 0.94-0.95; HW/TW: 0.43; PW/TW: 0.76.

Body shiny and glabrous (Fig. 20). Dorsum uniformly black. Head brown, except frons yellowish brown. Underside dark brown, except prosternum brown. Legs yellowish brown, tibiae and tarsi yellow (Fig. 1).

Head transverse and ventrally flattened; frontal punctures inconspicuous and sparsely distributed, with long sparsely distributed setae (Fig. 2); eyes round, large and coarsely faceted, widest interocular distance 0.44 × width of head (Fig. 2). Antennal club, oval and flat, apex angular (Fig. 5).

Pronotum short and strongly transverse, with anterior corners inconspicuous and blunt, mat and shagreened. Pronotal disk with densely distributed large and fine punctures both associated with long sparsely distributed setae, punctures inconspicuous. Elytra smooth and shiny, with several long setae along margins, punctures extremely fine and inconspicuous. Prosternum mat and impunctate. Mesoventrite transverse, very short, surface mat, weakly furrowed (Fig. 3). Metaventrite shiny and glabrous, punctures fine and sparsely distributed, 3.0-4.0 diameters apart. Meso- and metatibiae protuberant externally beyond middle; tarsus with 3 tarsomeres (Fig. 9).

Male genitalia. Penis strongly curved along entire length, apex strongly narrowed and acicular, penis capsule with large outer arm and inconspicuous inner one (Figs 86-87). Tegmen rather slender and strongly asymmetrical. Penis guide in lateral view slender, straight, apex pointed (Fig. 88), in ventral view flat and triangular, apex finger-shaped (Fig. 89). Parameres conspicuous, small (Fig. 88).

Types.

Holotype ♂: China, Yunnan: Dadugang, Puer, 22°22.35'N, 100°56.68'E, ca 950m, 26.iv.2008, Wang XM leg. Paratypes (20): Yunnan: 3♂♂2♀♀, same data to holotype; 2♂♂2♀♀, Tongbiguan, Nabang, Yingjiang, 24°37.86'N, 97°34.75'E, ca 1000m, 22-23.v.5.2008, Wang XM et al.leg.; 2♂♂5♀♀, Ganlongjing, Lianhuatan, Hekou, 22°56.59'N, 103°31.68'E, ca 710m, 20.v.2009, Wang XM et al. leg.; 1♀, Yaoqu, Mengla, 700m, 7.v.2009, Wang XM leg.; 1♂, Ainiguzhai, Jinghong, 21°54.67'N, 101°10.31'E, ca 660m, 11.v.2009, Wang XM leg.; 1♂, Lianhuatan, Hekou, 22°53.86'N, 103°34.04'E, ca 900m, 22.iv.2008, Wang XM leg.; 1♂, Daheishan, Jiangcheng, 22°33.62'N, 101°50.16'E, ca 1240m, 17.v.2009, Wang XM leg.

Distribution.

China (Yunnan).

Etymology.

The specific epithet is formed from the Latin adjective dactylicus, referring to the finger-shaped apex of the penis guide.