Trichomycterus varii sp.nov. from Jujuy, Argentina

Steindachnerina insculpta – not a species from Argentina

Steindachnerina insculpta – first record from Argentina

Steindachnerina nigrotaenia – resurrected from synonymy with S. brevipinna

Trichomycterus ytororo sp.nov. from Misiones

Trichomycterus yuska sp.nov. from Catamarca

Steindachneridion melanodermatum – first record from Argentina

Triportheus pantanensis – first record from Argentina

Silvinichthys pedernalensis sp.nov. from San Juan

Triportheus nematurus is a sr. synonym of T. paranensis