Abstract:The examination of the holotype and 61 of the 64 paratypes of Pimelodus heraldoi, syntypes of P. microstoma and additional specimens from the upper rio Paraná showed that the former species is a junior synonym of the latter. Both species were originally described from the rio Mogi-Guaçu, upper rio Paraná.O exame do holótipo e 61 dos 64 parátipos de Pimelodus heraldoi, dos síntipos de P. microstoma e de exemplares adicionais do alto rio Paraná, mostrou que a primeira espécie é um sinônimo júnior da segunda. Amb… Show more
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