Melanorivulus punctatus comb.nov. from Rivulus

Megaleporinus piavussu – first record from Argentina

Megaleporinus macrocephalus comb.nov. from Leporinus

Loricaria luciae sp.nov. from Corrientes, Argentina

Loricaria holmbergi sp.nov. from Jujuy, Argentina

Leporinus amae – first record from Argentina

Jenynsia tucumana sp.nov. from Tucumán and Salta

Jenynsia sulfurica sp.nov. from Jujuy, Argentina

Jenynsia luxata sp.nov. from Tucumán, Argentina

Poecilia vivipara – not a species from Argentina