Family Opisthorchiidae Braun, 1901

Pachytrema Looss 1907

Pachytrema magnum Travassos, 1921 Syn.: Pachytrema calculus Looss, 1907 Other host: L. argentatus .

Location: small intestine.

Locality: Cabo Frio, Rio de Janeiro (Brazil). Reference: Travassos et al. (1962).