Rio Grande minnow
- kingdom: Animalia
- phylum: Chordata
- class: Actinopterygii
- order: Cypriniformes
- family: Cyprinidae
- genus: Hybognathus
- species: Hybognathus amarus
Reynosa
Tamaulipas
MexicoBrownsville
Hidalgo
Roma-Los Saenz
Texas
United States