Chasmogenus abnormalis (Sharp, 1890)

Jia, Fenglong & Tang, Yu-dan, 2018, A faunistic study of genus Chasmogenus Sharp, 1882 of China (Coleoptera, Hydrophilidae), ZooKeys 738, pp. 59-66 : 62-63

Chasmogenus abnormalis (Sharp, 1890) Fig. 10

Philydrus abnormalis Sharp, 1890: 351; Hansen 1999: 174 (complete synonymy); Devi et al. 2016: 296.

Material examined.

CHINA: Guangdong: 4 males, 6 females (SYSU), Guangdong, Zhuhai, Hengqing island, 10.VII.2006, Fenglong Jia leg. [transcribed from Chinese]. Macau: 2 females (SYSU), Cotai Ecosystematic Reserve, part 1, 8.iv.2014, Weicai Xie et Jinwei Li leg. [transcribed from Chinese].

Remarks.

This species is close to C. orbus from which it can only be distinguished by the aedeagus. Parameres without or with small subapical tooth ( Devi et al. 2016: figs 10-13), apex broadened inwards (Fig. 10). Median lobe gradually narrowing from apical quarter to apex, moderately constricted in apical fifth and strongly curved subapically, apex truncate (Fig. 10).

Distribution.

China (Guangdong, Macau); Cambodia, India, Indonesia, Japan, Sri Lanka, Thailand, Vietnam.

Key to the species of the Chasmogenus of China