Hoplisoma osvaldoi – sp.nov. from Argentina

Urkumayu gen.nov. – with comb.nov. from Hoplisoma

Hypostomus nigropunctatus – first record from Argentina

Megalamphodus eques – comb.nov. from Hyphessobrycon

Bario australis – comb.nov. from Moenkhausia

Bario forestii – comb.nov. from Moenkhausia

Ctenobrycon kennedyi – comb.nov. from Psellogrammus

Psalidodon alleni – comb.nov. from Astyanax

Psalidodon dissimilis – comb.nov. from Astyanax

Psalidodon saguazu – comb.nov. from Astyanax