Microserangium Miyatake, 1961

Wang, Xingmin, Ślipinski, Adam & Ren, Shunxiang, 2013, The genus Microserangium Miyatake (Coleoptera, Coccinellidae) from China, ZooKeys 359, pp. 13-33 : 15-17

Genus Microserangium Miyatake, 1961

Microserangium Miyatake, 1961a: 37. Type species, original designation, Microserangium shikokense Miyatake, 1961a.

Serangiella Chapin, 1940: 271. Unavailable name.

Diagnosis.

This genus is very similar to Pangia Wang & Ren, 2012 but it can be distinguished from the latter as follows: mandible reduced, apical tooth erect (Fig. 4), penis guide usually simple (Figs 25, 33, 41), ovipositor elongate-oval and without styli, spermatheca composed of two or three globular parts (Figs 10-11). In Pangia , the mandible is normal, apical tooth is bent, penis guide is strongly asymmetrical and complex, ovipositor is triangularly elongate and usually bearing short styli, and spermatheca has a large part and a small process.

This genus is also similar to Catanella Miyatake, 1961, but it can be distinguished from the latter as follows: mandible reduced with erect apical tooth (Fig. 4), antenna with 9 antennomeres, with antennomere 3 strongly triangular (Fig. 5). In Catanella , the mandible is normal, apical tooth is bent, antennae with 8 antennomeres, with antennomere 3 elongate and not expanded.

Description.

Body minute, hemispherical with head in repose drawn into prothorax and closely fitting ventrally against prominent prosternal lobe (Fig. 1); dorsum glabrous, pronotum and elytral outer margins with sparse long setation (Figs 12-20). Head transverse, ventrally flattened with clypeal region prominent anteriorly (Fig. 2); frontoclypeus deeply emarginated around exposed antennal insertions. Mandible reduced, apical tooth erect (Fig. 4). Antenna with 9 antennomeres; antennomere 1 stout, antennomere 2 globular and smaller than 1, antennomere 3 strongly triangular; club, oval and flat with apex angulate (Fig. 5). Terminal maxillary palpomere always longer than wide, barrel-shaped, truncate at apex (Fig. 6).

Pronotum strongly transverse, anterior corner rounded. Scutellum relatively large, triangular. Elytra usually smooth without visible punctures. Wings with greatly reduced venation. Prosternum strongly prominent medially forming a broad lobe concealing mouthparts from below; prosternal process subtruncate apically, broad, without carinae (Fig. 3). Mesoventrite very short and broad. Metaventrite large and broad, surface shining and glabrous (Fig. 1). Epipleuron moderately narrow, incomplete, reaching 2/3 of elytral length, with clearly delimited cavities to accommodate apices of meso- and metafemora. Abdomen with 5 ventrites (Fig. 7), ventrite 1 and 5 much longer than 2-4; hind margin of terminal ventrite rounded and smooth. Abdominal postcoxal lines incomplete, reaching lateral margin of ventrite, without associated pits or pores. Femora, especially profemur, broad, flat, closely fitting into depressions on ventral surface, protecting tibiae and tarsi from below; meso- and metatibiae conspicuously protuberant externally beyond middle, usually triangular; tarsus with 3 (Figs 8-9), rarely 4 tarsomeres.

Male genitalia: tegmen strongly asymmetrical, parameres extremely short or distinctly reduced sparsely setose apically (Figs 24-25). Female genitalia: ovipositor oval, without styli; spermatheca small and well sclerotised (Figs 10-11).

Distribution.

China, India, Japan, Mayotte Island (Indian Ocean), Sri Lanka, Vietnam.

Key to species of Microserangium from China