Acanthoparyphium spinulosum Johnston, 1917 (biology source)
Ascorhytis charadriformis (Young, 1949) Ching, 1965 (biology source)
Austrobilharzia variglandis (Miller & Northup, 1926) Penner, 1953 (biology source)
Catatropis johnstoni Martin, 1956 (biology source)
Cercaria foliatae Miller, 1925 (biology source)
Cercaria littorinalinae Penner, 1950 (biology source)
Cercaria margaritensis Ching, 1982 accepted as Parvatrema margaritense (Ching, 1982) Galaktionov, Irwin & Saville, 2006 (biology source)
Cercaria noblei Giles, 1962 (biology source)
Cercaria purpuracauda Miller, 1925 (biology source)
Cercaria searlesiae Miller, 1925 (biology source)
Cloacitrema michiganensis McIntosh, 1938 (biology source)
Cryptocotyle lingua (Creplin, 1825) Fischoeder, 1903 (biology source)
Euhaplorchis californiensis Martin, 1950 (biology source)
Gymnophallus deliciosus (Olsson, 1893) Odhner, 1900 (biology source)
Gymnophallus somateriae (Levinsen, 1881) Odhner, 1900 (biology source)
Himasthla rhigedana Dietz, 1909 (biology source)
Lacunovermis conspicuus Ching, 1965 accepted as Lacunovermis macomae (Lebour, 1908) Loos-Franck, 1970 (biology source)
Lecithaster salmonis Yamaguti, 1934 (original description (unavailable nomenclaturally))
Maritrema gratiosum Nicoll, 1907 (biology source)
Maritrema laricola Ching, 1963 (biology source)
Maritrema megametrios Deblock & Rausch, 1968 (biology source)
Maritrema pacifica Ching, 1974 (biology source)
Meiogymnophallus multigemmulus Ching, 1965 accepted as Gymnophallus affinis Jameson & Nicoll, 1913 (biology source)
Mesostephanus appendiculatus (Ciurea, 1916) Lutz, 1935 (biology source)
Microphallus nicolli (Cable & Hunninen, 1938) Baer, 1944 (biology source)
Microphallus pirum (Afanasyev, 1941) Rausch, 1953 accepted as Microphallus comandorensis Deblock, 1980 accepted as Microphallus enhydrae Rausch & Locker, 1951 (biology source)
Microphallus pygmaeus (Levinsen, 1881) Baer, 1944 (biology source)
Microphallus similis (Jägerskiöld, 1900) Baer, 1944 (biology source)
Neolebouria tinkerbellae Thompson & Margolis, 1987 accepted as Mesobathylebouria tinkerbellae (Thompson & Margolis, 1987) Martin, Huston, Cutmore & Cribb, 2019 (biology source)
Parastictodora hancocki Martin, 1950 accepted as Acanthotrema hancocki (Martin, 1950) Lafuente, Roca & Carbonell, 2000 (biology source)
Parorchis acanthus (Nicoll, 1906) Nicoll, 1907 (biology source)
Parvatrema borealis Stunkard & Uzmann, 1958 accepted as Parvatrema boreale Stunkard & Uzmann, 1958 (biology source)
Parvatrema obscurum (Ching, 1960) James, 1964 accepted as Gymnophallus obscurus Ching, 1960 (biology source)
Phocitremoides ovale Martin, 1950 (biology source)
Podocotyle enophrysi Park, 1937 (biology source)
Probolocoryphe uca (Sarkisian, 1957) Heard & Sikora, 1969 accepted as Probolocoryphe glandulosa (Coil, 1955) Heard & Sikora, 1969 (biology source)
Pronoprymna petrowi (Layman, 1930) Bray & Gibson, 1980 (biology source)
Pseudospelotrema japonicum Yamaguti, 1939 (biology source)
Psilostomum magniovum Ching, 1980 (biology source)
Pygidiopsoides spindalis Martin, 1951 (biology source)
Renicola buchanani (Martin & Gregory, 1951) (biology source)
Renicola cerithidicola Martin, 1971 (biology source)
Renicola thaidus Stunkard, 1964 accepted as Renicola parvicaudatus (Stunkard & Shaw, 1931) Galaktionov, Solovyeva, Blakeslee & Skírnisson, 2022 (biology source)
Telolecithus pugetensis Lloyd & Guberlet, 1932 (biology source)