Trimerodytes

Trimerodytes is a genus of snakes in the subfamily Natricinae of the family Colubridae. The genus is endemic to East Asia and Southeast Asia.

Species
The genus Trimerodytes contains 7 species which are recognized as being valid.
 * Trimerodytes aequifasciatus (Barbour, 1908) – Asiatic annulate keelback, Asiatic water snake
 * Trimerodytes annularis (Hallowell, 1856) – red-bellied annulate keelback, ringed water snake
 * Trimerodytes balteatus Cope, 1895 – Hainan mountain keelback
 * Trimerodytes percarinatus (Boulenger, 1899) – eastern water snake, olive keelback, olive annulate keelback, Chinese keelback water snake
 * Trimerodytes praemaxillaris (Angel, 1929) – Angel's mountain keelback, brown stream snake
 * Trimerodytes yapingi (Guo, Zhu & Liu, 2019) – Jingdong water snake
 * Trimerodytes yunnanensis (Rao & Yang, 1998) – Yunnan water snake, Yunnan annulate keelback

Nota bene: A binomial authority in parentheses indicates that the species was originally described in a genus other than Trimerodytes.