''Xenodexia'' is a genus of
poeciliid
Poeciliidae are a family of freshwater ray-finned 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 fam ...
fish. It contains the single species ''Xenodexia ctenolepis'', the Grijalva studfish, which is
endemic
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...
to river basins in
Guatemala
Guatemala, officially the Republic of Guatemala, is a country in Central America. It is bordered to the north and west by Mexico, to the northeast by Belize, to the east by Honduras, and to the southeast by El Salvador. It is hydrologically b ...
where it lives in both slow- and fast-flowing waters. Females reach up to in
total length
Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including taxonomy and fishery biology.
Overall length
Standard length (SL) is the length of a fish measured f ...
and males are somewhat smaller.
It is the only member of the subfamily Xenodexiinae.
References
Poeciliidae
Endemic fauna of Guatemala
Fish of Guatemala
Freshwater fish of Central America
Monotypic freshwater fish genera
Taxa named by Carl Leavitt Hubbs
Fish described in 1950
{{Poeciliidae-stub