Piabina argentea Reinhardt, 1867

Fig. 3N

Distribution.

Upper rio Paraná, rio São Francisco, rio Itapicuru, rio Paraíba do Sul, and rio Itapemirim basins: Brazil and Paraguay.

Diagnosis.

Piabina argentea is diagnosed by having longitudinal dark band in the lateral of the body; dark spot in caudal peduncle absent; 18-21 rays in anal fin.