Leporinus tigrinus – first record from Argentina

Engraulisoma taeniatum – first record from Uruguay

Xyliphius barbatus – not a species from Uruguay

Leporinus inexpectatus – first record from Paraguay

Osteogaster aenea – comb.nov. from Corydoras

Gastrodermus undulatus – comb.nov. from Corydoras

Gastrodermus hastatus – comb.nov. from Corydoras

Brochis britskii – comb.nov. from Corydoras

Hoplisoma carlae – comb.nov. from Corydoras

Hoplisoma diphyes – comb.nov. from Corydoras