Episcapha (Ephicaspa) quadriconcava, Li, Jing & Ren, Guo-Dong, 2012

Li, Jing & Ren, Guo-Dong, 2012, A key to known species of Episcapha (subgenus Ephicaspa Chujo) (Coleoptera, Erotylidae, Megalodacnini), with the description of two new species, ZooKeys 203, pp. 47-53 : 49-51

Episcapha (Ephicaspa) quadriconcava sp. n.

Type material.

Holotype. female, CHINA: Guangxi Zhuang Autonomous Region, Leye County, 24.7833°N, 106.5666°E, 26 VII 2004, Yang YU and Chao GAO (MHU). Paratypes. 1 male and 4 females, same data as holotype (MHU).

Description.

Body (Fig. 12) elongate, length: 8.5-9.1 mm; width: 3.3-3.6 mm (bl/bw = 2.53-2.58; average = 2.56); general color black and shining; mouthparts and tarsi brown. Each elytron with 2 orange bands; anterior band extending obliquely from humerus to the middle of striae I and II, with 3 teeth at anterior and posterior borders, not reaching base at humeral angle; posterior band at four fifths length of elytron, almost quadrate, extending from the suture to near the lateral border.

Head (Fig. 13) strongly and sparsely punctured on vertex, without ocular lines. Clypeus finely and closely punctured, with anterior border nearly straight, with a fovea on each side of the base. Eyes large, prominent laterally. Antennae (Fig. 14) long, extending behind posterior border of pronotum; antennomere III about 1.2 times as long as IV; antennomere VIII slightly wider than VII, about 1.2 times as wide as long; antennomere IX blow-shaped; antennomere X almost asymmetrical triangular; antennomere XI almost pentagonal; relative lengths of antennomeres II–XI: 8.0: 12.0: 10.0: 9.0: 9.0: 10.0: 10.0: 11.0: 10.0: 13.0. Mentum (Fig. 15) pentagonal, pointed apically, with fine punctures and short setae; submentum with sparse coarse punctures.

Pronotum (Fig. 16) widest at middle (pl/pw = 0.59-0.63; average = 0.61); sides almost parallel on posterior half, and narrowing toward apex. Pronotum distinctly punctured on median area; finely and closely punctured on the lateral areas; with a transverse depression at base. Anterior angles projected; posterior angles obtuse. Prosternum (Fig. 17) coarsely and densely punctured on lateral areas, almost confluent and forming oblique rugae; surface with golden pubescence. Prosternal process dilated apically; strongly emarginated at apical border; distinctly depressed in the middle. Prosternal femoral lines extended a little in front of the prosternal cavity, almost straight and parallel.

Scutellum pentagonal, with fine and spare punctures.

Elytra widest at one fourth from base, then gradually narrowing to apex; each elytron with 7 striae; intervals with fine punctures.

Mesoventrite (Fig. 18) finely and sparsely punctured, with a median quadrate depression; surface with pubescence.

Aedeagus (Fig. 19) with median lobe moderately curved, narrowing to a point in lateral view; median strut long, about 1.5 times as long as median lobe. Anterior end of internal sac as in Fig. 20.

Female genitalia (Fig. 21) with styli most narrow at apex; proctigeral lobes rounded apically; female spermatheca (Fig. 22) with head almost kidney-shaped.

Distribution.

Known only from the type locality (China: Guangxi Zhuang Autonomous Region, Leye County).

Diagnosis.

Episcapha (Ephicaspa) quadriconcava is closest to Episcapha (Ephicaspa) yunnanensis Li & Ren, 2006, due to the similar form and color of the body in both species. The new species can be distinguished from Episcapha (Ephicaspa) yunnanensis by the head without ocular lines, pronotum widest at middle, mesoventrite with a median quadrate depression, aedeagus with median lobe narrowing to a point in lateral view. Episcapha (Ephicaspa) yunnanensis with ocular lines on head, pronotum widest at base, mesoventrite with a median trapezoidal depression, aedeagus with median lobe hooked at apex in lateral view.

Etymology.

The species is named with a quadrate depression on the median of mesoventrite.

Key to the species of subgenus Ephicaspa Chûjô