''Heterophallus'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of small

poeciliid The Poeciliidae are a family of freshwater fishes of the order Cyprinodontiformes, the tooth-carps, and include well-known live-bearing aquarium fish, such as the guppy, molly, platy, and swordtail. The original distribution of the family was t ...

s found near the coast in calm waters of river basins in southeastern

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

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 The family name Regan, along with its cognates O'Regan, O Regan, Reagan, and O'Reagan, is an Anglicized form of the Irish surname Ó Riagáin or Ó Ríogáin, from Ua Riagáin. The meaning is likely to have originated in ancient Gaelic ''ri'' ...

, 1914 (Coatzacoalcos gambusia) FishBase places ''Heterophallus echeagarayi'' in the genus ''

Gambusia ''Gambusia'' is a large genus of viviparous fish in the family Poeciliidae (order Cyprinodontiformes). ''Gambusia'' contains over 40 species, most of which are principally found in freshwater habitats, though some species may also be found in br ...

''.

References

Poeciliidae Freshwater fish genera Taxa named by Charles Tate Regan Ray-finned fish genera Endemic fish of Mexico Freshwater fish of Mexico {{Cyprinodontiformes-stub