Author: Andrade, Machado, Jégu, Farias & Giarrizzo, 2017
Comments: Inhabits rapids associated with rocky outcropping covered in aquatic macrophytes of the families Podostemaceae and Fabaceae, which serve as a food source for this fish.  The stomach contents of one large specimen measuring 34.0 cm SL consisted mainly of large pieces of Podostemaceae (leaves and flowers), but also comprised of three small Fabaceae fruits and a cricket (Orthoptera).  Occurs syntopically with three other serrasalmid, rapids-adapted species, namely, <i>Mylesinus paucisquamatus</i>, <i>Myleus setiger</i>, and <i>Tometes ancylorhynchus</i>.  Commonly captured by local, professional and amateur fishermen in the Itacaiúnas River.  One of the most in demand species for game fishing in the region based on fishermen report (Ref. 116762).