On some freshwater fish species reported by Perugia (1891) from Argentina

Perugia (1891) described and recorded many fish species from Argentina, Paraguay and Brazil, whose voucher speci- mens were deposited at the Museo Civico di Storia Naturale di Genova (MSNG). Several species recorded by Perugia (1891) from Argentina were misidentified, which lead to er- roneous citations of species for the Rio de la Plata basin dur- ing more than one century, species which in fact are restrict- ed to river drainages from northern South America. The re- evaluation of the specimens identified by Perugia (1891) as Pimelodus cristatus Muller & Troschel, Ramphichtys brevi- rostris Steindachner, and Myletes asterias Muller & Troschel, and the records of Serrasalmo humeralis Valenciennes, and Serrasalmo gymnogenys Gunther allowed us to rectify these records and exclude these species from the fish fauna lists of both the Rio de la Plata basin and Argentina. Resumen Perugia (1891) describio y registro muchas especies de