Heterophallus
Heterophallus is a genus of small poeciliids found near the coast in calm waters of river basins in southeastern Mexico.
Species
There are currently two or three recognized species in this genus:Heterophallus echeagarayi Heterophallus milleri Radda, 1987 Heterophallus rachovii Regan, 1914FishBase places Heterophallus echeagarayi in the genus Gambusia.