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)
Aphallus tubarium (Rudolphi, 1819) Poche, 1926 (biology source)
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)
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)
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)
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 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)
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)
Crepidostomum cooperi Hopkins, 1932 (redescription)
Crepidostomum cornutum (Osborn, 1903) Stafford, 1904 (redescription)
Crepidostomum farionis (Müller, 1780) Lühe, 1909 (redescription)
Crepidostomum metoecus (Braun, 1900) Braun, 1900 (biology source)
Cryptogonimus chili Osborn, 1903 (biology source)
Cyclocoelum microstomum (Creplin, 1829) Kossack, 1911 accepted as Cyclocoelum mutabile (Zeder, 1800) Brandes, 1892 (redescription)
Cyclocoelum mutabile (Zeder, 1800) Brandes, 1892 (redescription)
Dasymetra conferta Nicoll, 1911 (redescription)
Dasymetra villicaeca Byrd, 1935 (redescription)
Derogenes varicus (Müller, 1784) Looss, 1901 (redescription)
Deropristis inflata (Molin, 1859) Odhner, 1902 (redescription)
Didymozoidae Monticelli, 1888 (biology source)
Diphterostomum brusinae (Stossich, 1888) Stossich, 1904 (redescription)
Diplodiscus amphichrus Tubangui, 1933 (biology source)
Diplodiscus japonicus Yamaguti, 1936 (biology source)
Diplodiscus subclavatus (Goeze, 1782) Diesing, 1836 (redescription)
Diplostomulum ranae (Cort & Brackett, 1938) (biology source)
Dolichoperoides macalpini (Nicoll, 1914) Johnston & Angel, 1940 (redescription)
Dollfuschella rodhaini Vercammen-Grandjean, 1960 (redescription)
Dollfustrema echinatum (Komiya & Tajimi, 1941) Skrjabin & Guschanskaja, 1962 accepted as Dollfustrema vaneyi (Tseng, 1930) Eckmann, 1934 (redescription)
Echinochasmus bagulai Verma, 1935 (redescription)
Echinochasmus beleocephalus (Linstow, 1873) Dietz, 1909 (biology source)