Hisonotus yasi comb.nov. from Epactionotus

Hisonotus nigricauda – first record from Argentina

Hisonotus hungy sp.nov. from Misiones, Argentina

Hisonotus charrua – first record from Argentina

Hisonotus aky comb.nov. from Epactionotus

Heptapterus qenqo sp.nov. from Tucumán, Argentina

Heptapterus mbya sp.nov. from Misiones, Argentina

Heptapterus mandimbusu sp.nov. from Misiones, Argentina

Gymnotus sylvius – first record from Argentina

Gymnotus pantanal – first record from Argentina