Saxatilia lepidota – comb.nov. from Crenicichla

Hypostomus isbrueckeri – first record from Argentina

Microglanis malabarbai – first record from Argentina

Imparfinis guttatus – first record from Argentina

Acrobrycon tarijae – revalidated from synonymy

Austrolebias univentripinnis – first record from Uruguay

Xiphophorus hellerii – first record from Argentina

Diapoma potamohadros – new species from Argentina

Diapoma pampeana – new species from Uruguay

Doras punctatus – comb.nov. from Ossancora