Rhipidocotyle angusticolle Chandler, 1941 is refered for the first time in Brazil in a new host, Scomber colias Gm., from Cabo Frio Coast, Rio de Janeiro State. Opecoeloides pedicathedrae Travassos, Freitas & Bührnheim, 1966 is redescribed, also in a new host, Menticirrhus americanus (L.), from Mauá Beach, Rio de Janeiro State. Morphological redescriptions and original figures of this species are presented.