The genus Microserangium Miyatake (Coleoptera, Coccinellidae) from China

Abstract The genus Microserangium Chapinfrom China is reviewed. Nine species are recognized, including seven new species: M. erythrinum Wang & Ren, sp. n., M. fuscum Wang & Ren, sp. n., M. glossoides Wang & Ren, sp. n., M. shennongensis Wang & Ren, sp. n., M. semilunatum Wang & Ren, sp. n., M. deltoides Wang & Ren, sp. n., M. dactylicum Wang & Ren, sp. n. Male genitalia of M. hainanensis Miyatake, 1961 are described for the first time. All species are described and illustrated. A key and distribution map to the known species from China are given.


Introduction
The genus Microserangium was established by Miyatake (1961a) with M. shikokense Miyatake, 1961 as the type species, based on its antenna composed of nine antennomeres with the third antennomere strongly triangular, roughly quadrate mandible, and elytra at widest part (TW=EW); height, from the highest part of the beetle to elytral outer margins (TH); head width in frontal view, widest part (HW); pronotal length, from the middle of anterior margin to the base of pronotum (PL); pronotal width at widest part (PW); elytral length, along the suture, from the apex to the base including the scutellum (EL). Male and female genitalia were dissected, cleared in a 10% solution of NaOH by boiling for several minutes, and examined with an Olympus BX51 compound microscope.
Specimens were photographed with digital cameras (AxioCam HRc and Coolsnap-Procf & CRI Micro*Color), connected to the dissecting microscope. The software Axio-Vision Rel. 4.8 and Image-Pro Plus 5.1 were used to capture images from both cameras, and photos were cleaned up and laid out in plates with Adobe Photoshop CS 8.0.
Terminology follows Ślipiński (2007). Type specimens designated in the present paper are deposited at the Department of Entomology, South China Agriculture University (SCAU), Guangzhou, China.
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 . 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.
Distribution. China, India, Japan, Mayotte Island (Indian Ocean), Sri Lanka, Vietnam. 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.

Key to species of Microserangium from China
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).
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. Diagnosis. This species can be distinguished from other Microserangium species by its relatively small body, dark brown dorsum (Fig. 13), fine and sparse pronotal punctation, rather small penis capsule (Fig. 30), and rather wide penis guide (Fig. 33).
Head transverse and ventrally flattened; frons with four to six medium punctures and many fine punctures, and several long widely separated setae; eyes round, moderately large and coarsely faceted, widest interocular distance 0.57× width of head. Antennal club oval and flat, apex blunt (Fig. 35).
Male genitalia. Penis strongly curved along entire length, apex narrowed and pointed, penis capsule small (Figs 30-31). Tegmen slender and strongly asymmetrical. Penis guide in lateral view slender, almost straight, apex pointed (Fig. 32), in ventral view flat and rather wide (Fig. 33). Parameres small and short, less than 1/3 length of penis guide.
Types Diagnosis. This species can be distinguished from other Microserangium species by its male genitalia with relatively long parameres and tongue-shaped penis guide (Figs 40-41).
Body shiny and glabrous (Fig. 14). Dorsum uniformly dark brown to black. Head yellowish brown. Underside reddish brown, legs yellowish brown, tibiae and tarsi yellow.
Head transverse and ventrally flattened; frontal punctures medium-sized and densely distributed, 1.0-1.5 diameter apart, associated with several long sparsely distributed setae; eyes round, large and coarsely faceted, widest interocular distance 0.42× width of head. Antennal club oval and flat, apex angular (Fig. 43).
Pronotum transverse, anterior corners inconspicuous and blunt, Pronotal disk densley covered with large and fine punctures both associated with long sparsely distributed setae. Elytra smooth and shiny, with sparse row of long setae along margin, punctures extremely fine and inconspicuous. Prosternum mat and impunctate. Mesoventrite transverse, very short, surface mat, weakly furrowed. Metaventrite shiny and glabrous, punctures at center fine but conspicuous, 2.0-4.0 diameters apart. Mesoand metatibiae angulate externally beyond middle, almost triangular; tarsus with 3 tarsomeres (Fig. 44).
Male genitalia. Penis moderately curved, apex strongly narrowed and acicular, penis capsule with short outer arm and inconspicuous inner one (Figs 38-39). Tegmen slender and asymmetrical. Penis guide in lateral view slender, almost straight, apex pointed (Fig. 40), in ventral view flat and tongue-shape, apex slightly pointed (Fig.  41). Parameres moderately long, slightly less than ½ length of penis guide.
Head transverse and ventrally flattened; frontal punctures large and densely distributed, 0.3-1.0 diameter apart, associated with long sparsely distributed setae; eyes round, large and coarsely faceted, widest interocular distance 0.50× width of head. Antennal club oval and flat, apex blunt (Fig. 59).
Pronotum short and strongly transverse, anterior corner inconspicuous and blunt, mat and shagreened. Pronotal disk with densely distributed large and fine shallow punctures both associated with long sparsely distributed setae. Elytra smooth and shiny, with sparse row of long 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, 2.0-3.0 diameters apart. Meso-and metatibiae strongly angulate externally beyond middle; tarsus with 3 tarsomeres (Fig. 60).
Male genitalia. Penis strongly curved along entire length, apex narrowed and acicular, penis capsule with large outer arm and inconspicuous inner one (Figs 54-55). Tegmen rather slender and strongly asymmetrical. Penis guide in lateral view small, almost straight, apex pointed (Fig. 56), in ventral view small and semilunate (Fig. 57). Parameres conspicuous.
Pronotum strongly transverse, anterior corners inconspicuous and blunt, mat and shagreened. Pronotal disk with densely distributed large punctures associated with long sparsely distributed setae. 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, with densely distributed medium size punctures at center, 1.0-2.0 diameters apart. Meso-and metatibiae angulate externally beyond middle; tarsus with 3 tarsomeres (Fig. 68).
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).
Body shiny and glabrous (Fig. 19). Dorsum uniformly dark brown to black. Head reddish brown. Underside reddish brown, legs yellowish brown, tibiae and tarsi yellow.
Head transverse and ventrally flattened; frontal punctures fine and inconspicuous, with long sparsely distributed setae; eyes round, large and coarsely faceted, widest interocular distance 0.44× width of head. Antennal club oval and flat, apex blunt (Fig. 83).
Pronotum short and strongly transverse, anterior corners inconspicuous and blunt, mat and shagreened. Pronotal disk with densely distributed large and fine shallow punctures both associated with long sparsely distributed setae. Elytra smooth