Review of the genus Cybister in China, with description of a new species from Guangdong (Coleoptera: Dytiscidae)

Abstract: The genus Cybister Curtis, 1827 is reviewed with respect to the fauna of China. A new species, Cybister (Melanectes) danxiaensis sp. nov. is described and illustrated. Altogether, 16 Cybister species are recorded from China, although the status of two of them remains in question. All species are diagnosed, with their habitus and male genitalia illustrated. Additional faunistic data from China are provided for the following species: C. guerini Aubé, 1838 from Hainan; C. lewisianus Sharp, 1873 from Guangdong and Hainan; C. limbatus (Fabricius, 1775) from Guangdong, Guangxi and Hainan; C. rugosus (W. S. Macleay, 1825) from Chongqing, Guangdong, Hubei, Hunan, Jiangxi, Yunnan, Zhejiang; C. tripunctatus lateralis (Fabricius, 1798) from Chongqing, Guangxi, Jiangxi, Shanghai; C. brevis Aubé, 1838 from Guizhou, Hunan, Zhejiang; and C. sugillatus Erichson, 1834 from Guangxi and Yunnan. An updated identification key and distribution maps for all species are provided. Cybister lateralimarginalis torquatus (Fischer von Waldheim, 1829) is recorded for the first time from Tajikistan and Uzbekistan.

Key words: Coleoptera, Dytiscidae, Cybistrinae, Cybister, taxonomy, new species, new records, China, Palaearctic Region