It is proved histologically that lacking of tegumented papillae in Paramphistomum cervi is based on the alteration of the tegument furnished with papillae in the normal state. The differences in the dorsal extension of the vitellaria, in the histological structure of the genital opening complex and in other features, used by Eduardo (1982) for the division of P. cervi into 3 species, are refuted as not existing. Therefore the forms P. leydeni, P. scotiae and P. hiberniae remain well established synonyms of P. cervi.