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 Charles [Tate Regan|Regan], 1914