[New data on trematodes of the families Opecoelidae and Accacoeliidae from fishes in Atlantic ocean and its seas].

The additions concerning the morphological characters and measurements of Anomalotrema koiae, Helicometra fasciata, Accacladocoelium macrocotyle, A. petasiporum, and Paraccacladium jamiesoni have been made. Podocotyle atomon (Rud., 1802) in Gaevskaya, Umnova, 1977 described from Sebastes marinus from the northwest Atlantic is considered as Anomalotrema koiae. Helicometra fasciata is found in Mugilidae for the first time. Accacladocoelium macrocotyle and A. petasiporum are found in the new region--the Azores.