Brycon opalinus (Cuvier, 1819)

dos Santos, Sergio Alexandre & de Britto, Marcelo Ribeiro, 2021, The ichthyofauna of a poorly known area in the middle-southern Espinhaco mountain range, state of Minas Gerais, Brazil: diagnostics and identification keys, ZooKeys 1054, pp. 25-66 : 25

Brycon opalinus (Cuvier, 1819)

Distribution.

Rio Paraíba do Sul and rio Doce basins.

Diagnosis.

Brycon opalinus is diagnosed from its congeners by having one humeral spot and another in the caudal peduncle, never extending up to median caudal fin rays; tubules of the lateral line without secondary branches.