Microserangium erythrinum Wang & Ren

Wang, Xingmin, Ślipinski, Adam & Ren, Shunxiang, 2013, The genus Microserangium Miyatake (Coleoptera, Coccinellidae) from China, ZooKeys 359, pp. 13-33 : 18-21

Microserangium erythrinum Wang & Ren sp. n. Figures 12, 21-28, 93

Diagnosis.

This species can be distinguished from other Microserangium species by its yellow or burgundy elytral disk with dark brown margins and its penis guide acutely triangular (Figs 12, 25).

Description.

TL: 1.32-1.42mm, TW: 1.20-1.30mm, TH: 0.76-0.86mm, TL/TW: 1.09-1.10; PL/PW: 0.38-0.40; EL/EW: 0.88-0.89; HW/TW: 0.46; PW/TW: 0.73.

Body shiny and glabrous (Fig. 12). Head brown, frons yellowish brown. Pronotum brown to black, scutellum dark brown. Elytra with disk yellow to burgundy and margins dark brown. Underside dark red. Legs yellowish brown, tibiae and tarsi yellow.

Head transverse and ventrally flattened; frontal punctures large and sparsely distributed, with short sparsely distributed setae on frons; eyes round, large and coarsely faceted, widest interocular distance 0.39 × width of head. Antennal club oval and flat, apex rounded (Fig. 27).

Pronotum transverse, anterior corners rounded. Pronotal disk with large and fine punctures both associated with long sparsely distributed setae, the large punctures distinctly larger than those on frons, 0.5-3.0 diameters apart. Elytra smooth and shiny with sparsely distributed long setae along margins, punctures inconspicuous. Prosternum mat and impunctate. Mesoventrite transverse, very short, surface mat, weakly furrowed. Metaventrite shiny and glabrous, punctures fine and sparsely distributed, 1.0-2.0 diameters apart. Meso- and metatibiae angulate externally beyond middle, almost triangular; tarsus with 3 tarsomeres (Fig. 28).

Male genitalia. Penis strongly curved along entire length, apex narrowed and acicular, penis capsule with short outer arm and indistinct inner one (Figs 22-23). Tegmen slender and strongly asymmetrical. Penis guide in lateral view slender, almost straight, pointed apically (Fig. 24); in ventral view acutely triangular (Fig. 25). Parameres distinct, small, about half as long as penis guide.

Types.

Holotype ♂: China, Yunnan: Menglun, Xishuangbanna, 21°55.27'N, 101°16.64'E, ca 550m, 21.viii.2005, Wang XM leg. Paratypes (8): Yunnan: 1♀, Mengxing, Mengla, Xishuangbanna, 21°52.63'N, 101°27.07'E, ca 690m, 3.v.2008, Wang XM leg.; 1♀, Xishuangbanna Plant Park, Xishuangbanna, 21°56.05'N, 101°15.55'E, ca 550m, 22.viii.2005, Wang XM leg.; 1♀, Nuozadu, Simao, 22°34.0'N, 100°33.39'E, ca 750m, 12.v.2008, Wang XM leg.; 2♂♂, Dadugang, Puer, 22°22.35'N, 100°56.68'E, ca 950m, 5.v.2009, Ren SX & Wang XM leg.; 1♂1♀, Yaoqu, Mengla, 21°46.98'N, 101°29.34'E, ca 700m, 7.v.2009, Wang XM leg.; 1♂, Daheishan, Jiangcheng, 22°33.74'N, 101°50.87'E, ca 1300m, 17.v.2009, Wang XM leg.

Distribution.

China (Yunnan).

Etymology.

The specific epithet is formed from the Latin adjective erythrinus red colored, referring to the elytral disk being of yellow to burgundy color.