Mylesinus

Mylesinus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Characiformes
Family:	Serrasalmidae
Genus:	Mylesinus Valenciennes, 1850
Type species
Mylesinus schomburgkii Valenciennes, 1850

Mylesinus is a genus of serrasalmids from South America, where found in the eastern Amazon, Essequibo and Orinoco basins. They are rheophilic, typically found at rapids and mainly feed on Podostemaceae plants. Because of their habitat preference, they are threatened by the building of dams. They reach up to 35 cm (1.15 ft) in length.

There are three recognized species:

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Wikipedia