Hypostomus arecuta sp.nov. from Argentina

Moenkhausia sanctaefilomenae – not a species from Argentina

Mimagoniates inequalis – first record from Argentina

Jenynsia obscura is a senior synonym of J. pygogramma

Hypophthalmichthys nobilis – a new exotic from Argentina

Hypobrycon maromba – first record from Argentina

Hyphessobrycon togoi sp.nov. from Buenos Aires, Argentina

Hyphessobrycon nicolasi sp.nov. from Entre Ríos, Argentina

Hyphessobrycon isiri sp.nov. from Entre Ríos and Corrientes

Hyphessobrycon auca sp.nov. from Corrientes, Argentina