Trematoda Rudolphi, 1808
Aporocotylidae Odhner, 1912
Bolbocephalodidae Strand, 1935
Brauninidae Wolf, 1903
Clinostomatidae Luhe, 1901
Cyathocotylidae Poche, 1926
Diplostomatidae Poirier, 1886
Neostrigeidae
Ophiodiplostomatidae
Protrodiplostomatidae Dubois, 1936
Sanguinicolidae Graff, 1907
Schistosomatidae Stiles & Hassall, 1898
Spirorchiidae Stunkard, 1921
Strigeidae Railliet, 1919
