Xenurobryconinae

Tyttocharax is a genus of freshwater ray-finned fish belonging to the family Stevardiidae. The fishes in this genus are found in tropical South America.

Xenurobrycon is a genus of freshwater ray-finned fish belonging to the family Stevardiidae. The fishes in this genus are found in tropical South America.

species of fish

Scopaeocharax is a genus of freshwater ray-finned fishes belonging to the family Stevardiidae. The fishes in this genus are endemic to Peru, where both species are found in the upper and middle Huallaga River basin.

Iotabrycon is a monospecific genus of freshwater ray-finned fish belonging to the family Stevardiidae. The only species in the genus is Iotabrycon praecox, a fish which is endemic to Ecuador, where it is found in the Vinces River basin..