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By: Pedreira, Marcelo Mattos - Sampaio, Edson Vieira - Santos, José Cláudio Epaminondas dos - Pires, Aldrin VieiraType: ArticleIn: Neotropical IchthyologyVolume:Series:Issue:Date: 2012-01-01Page Range:Publication Info:Subjects: endemic Lophiosilurus alexandri Prochilodus costatus Rio São Francisco Visual perception