Hydromorphus

Hydromorphus is a genus of snakes in the subfamily Dipsadinae.

Geographic range
The genus Hydromorphus is endemic to Central America.

Species
Two species are recognized as being valid.
 * Hydromorphus concolor W. Peters, 1859 - Costa Rica water snake
 * Hydromorphus dunni Slevin, 1942 - Dunn's water snake

Etymology
The specific name, dunni, is in honor of American herpetologist Emmett Reid Dunn.