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 (Álvarez, 1952) (Maya gambusia)
- Heterophallus milleri Radda, 1987 (Grijalva gambusia)
- Heterophallus rachovii Regan, 1914 (Coatzacoalcos gambusia)
FishBase places Heterophallus echeagarayi in the genus Gambusia.
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