Acanthocolpidae Lühe, 1906 (biology source)
Acanthoparyphium paracharadrii Velasquez, 1964 (redescription)
Acanthoparyphium spinulosum Johnston, 1917 (redescription)
Acanthostomum floridense (McCoy, 1928) Price, 1940 (redescription)
Accacoeliinae Odhner, 1911 (biology source)
Acetodextra amiuri (Stafford, 1900) Pearse, 1924 (biology source)
Allassostomoides parvus (Stunkard, 1916) Stunkard, 1924 (redescription)
Allocreadium isoporum (Looss, 1894) Looss, 1902 (redescription)
Allocreadium lobatum Wallin, 1909 (biology source)
Alloglossidium corti (Lamont, 1921) Van Cleave & Mueller, 1934 (redescription)
Alloglossidium hirudicola Schmidt & Chaloupka, 1969 (biology source)
Amphimerus elongatus Gower, 1938 (redescription)
Aphallus tubarium (Rudolphi, 1819) Poche, 1926 (biology source)
Apharyngolevinseniella Yamaguti, 1975 accepted as Levinseniella Ward, 1901 (original description)
Apharyngolevinseniella capitanea (Overstreet & Perry, 1972) Yamaguti, 1975 accepted as Levinseniella capitanea Overstreet & Perry, 1972 accepted as Levinseniella (Monarrhenos) capitanea Overstreet & Perry, 1972 (new combination reference)
Apophallus bacalloti Morozov, 1952 (biology source)
Ascocotyle branchialis Timon-David, 1961 (redescription)
Ascocotyle leighi Burton, 1956 (biology source)
Ascorhytis charadriformis (Young, 1949) Ching, 1965 (redescription)
Astiotrema monticellii Stossich, 1904 accepted as Plesioastiotrema monticellii (Stossich, 1904) Karar, Blend, Dronan & Adel, 2023 (biology source)
Astiotrema trituri Grabda, 1959 accepted as Neoastiotrema trituri (Grabda, 1959) Tkach, 2008 (redescription)
Asymphylodora amnicolae Stunkard, 1959 (redescription)
Asymphylodora dollfusi Biguet, Deblock & Capron, 1956 (redescription)
Asymphylodora progenetica Serkova & Bykhowskii, 1940 (redescription)
Asymphylodora tincae (Modeer, 1790) Lühe, 1909 (redescription)
Atriophallophorus minutus (Price, 1934) Deblock & Rose, 1964 (redescription)
Auridistomum chelydrae (Stafford, 1900) Stafford, 1905 (redescription)
Austrobilharzia penneri Short & Holliman, 1961 (redescription)
Austrobilharzia terrigalensis Johnston, 1917 (redescription)
Austrobilharzia variglandis (Miller & Northup, 1926) Penner, 1953 (redescription)
Azygia acuminata Goldberger, 1911 (redescription)
Azygia longa (Leidy, 1852) Manter, 1926 (redescription)
Azygia lucii (Müller, 1776) Lühe, 1909 (redescription)
Azygia sebago Ward, 1910 accepted as Azygia longa (Leidy, 1852) Manter, 1926 (redescription)
Bacciger bacciger (Rudolphi, 1819) Nicoll, 1914 (redescription)
Bilharziella polonica (Kowalewski, 1895) Looss, 1899 (redescription)
Bivesicula caribbensis Cable & Nahhas, 1962 (redescription)
Bivesiculidae Yamaguti, 1934 (biology source)
Brachycoelium mesorchium Byrd, 1937 (redescription)
Brachycoelium obesum Nicoll, 1914 (redescription)
Brachylaima fuscatum (Rudolphi, 1819) Joyeux, Baer & Timon-David, 1932 accepted as Brachylaima fuscata (Rudolphi, 1819) Joyeux, Baer & Timon-David, 1932 (redescription)
Brachylaima nicolli (Witenberg, 1925) Joyeux, Baer & Timon-David, 1932 (biology source)
Brachylecithum alfortense Railliet in Dollfus, 1954 (biology source)
Brachylecithum mosquense (Skrjabin & Isaichikov, 1927) Shtrom, 1940 accepted as Brachydistomum ventricosum (Rudolphi, 1802) Sitko & Okulewicz, 2002 (redescription)
Brachylecithum orfi Kingston & Freeman, 1959 (redescription)
Bucephalopsis clara Komiya, 1943 accepted as Prosorhynchoides clara (Komiya, 1943) (redescription)
Bucephalopsis gracilescens (Rudolphi, 1819) Nicoll, 1914 accepted as Prosorhynchoides gracilescens (Rudolphi, 1819) Stunkard, 1976 (biology source)
Bucephalopsis haimeanus (Lacaze-Duthiers, 1854) Nicoll, 1914 accepted as Prosorhynchoides haimeana (Lacaze-Duthiers, 1854) (redescription)
Bucephalopsis pusilla (Stafford, 1904) Eckmann, 1932 accepted as Bucephalopsis pusillus (Stafford, 1904) accepted as Prosorhynchoides pusillus (Stafford, 1904) Margolis & Arthur, 1979 (redescription)
Bucephalus cuculus McCrady, 1874 accepted as Prosorhynchoides haimeana (Lacaze-Duthiers, 1854) (redescription)
Bucephalus elegans Woodhead, 1930 (redescription)
Bucephalus loeschi Hopkins, 1958 (biology source)
Bucephalus longicornutus (Manter, 1954) Howell, 1966 accepted as Alcicornis longicornutus Manter, 1954 (redescription)
Bucephalus mytili Cole, 1935 (redescription)
Bucephalus polymorphus von Baer, 1827 (biology source)
Bunocotyle cingulata Odhner, 1928 (redescription)
Bunodera luciopercae (Müller, 1776) Lühe, 1909 (redescription)
Bunoderella metteri Schell, 1964 (redescription)
Bunoderina eucaliae Miller, 1936 accepted as Bunodera eucaliae (Miller, 1936) Miller, 1940 (redescription)
Burnellus trichofurcatus (Johnston & Angel, 1940) Angel, 1971 accepted as Monodhelmis trichofurcata (Johnston & Angel, 1940) Cribb & Bray, 1994 (biology source)
Caecincola parvulus Marshall & Gilbert, 1905 (redescription)
Cainocreadium gulella (Linton, 1910) Durio & Manter, 1968 (biology source)
Cardicola alseae Meade & Pratt, 1965 (redescription)
Cardicola klamathensis (Wales, 1958) Meade & Pratt, 1965 (redescription)
Carneophallus basodactylophallus Bridgman, 1969 accepted as Microphallus basodactylophallus (Bridgman, 1969) Deblock, 1971 (biology source)
Carneophallus choanophallus Bridgman, 1969 accepted as Carneophallus turgidus Leigh, 1958 accepted as Microphallus turgidus (Leigh, 1958) Belopolskaya, 1963 (biology source)
Catatropis indicus Srivastava, 1935 (biology source)
Catatropis johnstoni Martin, 1956 (redescription)
Catatropis verrucosa (Frölich, 1789) Odhner, 1905 (redescription)
Cathaemasia hians (Rudolphi, 1809) Looss, 1899 (biology source)
Centrocestus armatus (Tanabe, 1922) Price, 1932 (redescription)
Centrocestus cuspidatus (Looss, 1896) Looss, 1899 (biology source)
Centrocestus formosanus (Nishigori, 1924) Price, 1932 (redescription)
Centrocestus nycticoracis (Izumi, 1935) Kobayashi, 1942 accepted as Centrocestus armatus (Tanabe, 1922) Price, 1932 (biology source)
Cephalogonimus americanus Stafford, 1902 (redescription)
Cephalouterina dicamptodoni Senger & Macy, 1953 (redescription)
Cercaria apalachiensis Holliman, 1961 (redescription)
Cercaria asymmetrica Holliman, 1961 (redescription)
Cercaria caribbea LIII of Cable (1963) (redescription)
Cercaria caribbea LX of Cable (1963) (redescription)
Cercaria coronanda Rothschild, 1938 accepted as Acanthostomum coronandum (Rothschild, 1938) Price, 1940 (biology source)
Cercaria cristulata Holliman, 1961 (redescription)
Cercaria fimbriata Holliman, 1961 (redescription)
Cercaria fragosa Holliman, 1961 (redescription)
Cercaria granosa Holliman, 1961 (redescription)
Cercaria imbecilla Holliman, 1961 (redescription)
Cercaria loossi Stunkard, 1929 (redescription)
Cercaria pusilla Holliman, 1961 (redescription)
Chione gallina (Linnaeus, 1758) accepted as Chamelea gallina (Linnaeus, 1758) (basis of record)
Clinostomum chabaudi Vercammen-Grandjean, 1960 (redescription)
Clinostomum complanatum (Rudolphi, 1814) Braun, 1899 (redescription)
Clinostomum giganticum Agarwal, 1959 (redescription)
Clinostomum heluans Braun, 1899 (redescription)
Clinostomum piscidium Southwell & Prashad, 1918 (redescription)
Clinostomum tilapiae Ukoli, 1966 (biology source)
Cloacitrema michiganensis McIntosh, 1938 (biology source)
Cloacitrema philippinum Velasquez, 1969 (redescription)
Coitocaecum anaspidis Hickman, 1934 (redescription)
Conspicuum icteridorum Denton & Byrd, 1951 (redescription)
Corpopyrum jaenschi (Johnston & Simpson, 1940) Yamaguti, 1958 accepted as Haematotrephus jaenschi (Johnston & Simpson, 1940) Dronen & Blend, 2015 (redescription)

Democratic Republic of the Congo for Clinostomum chabaudi Vercammen-Grandjean, 1960 
Japan for Megalophallus miyazakii Yamaguti, 1975 
Tennessee for Diplostomulum ranae (Cort & Brackett, 1938)