Acanthatrium anaplocami Etges, 1960 (redescription)
Acanthatrium hitaensis Koga, 1953 (redescription)
Acanthatrium oregonense Macy, 1939 (redescription)
Acanthatrium ovatum Yamaguti, 1939 (redescription)
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)
Alaria alata (Goeze, 1782) Krause, 1914 (redescription)
Alaria arisaemoides Augustine & Urtibe, 1927 (redescription)
Alaria canis La Rue & Fallis, 1936 accepted as Alaria americana Hall & Wigdor, 1918 (biology source)
Alaria intermedia (Olivier & Odlaug, 1938) Odlaug, 1940 accepted as Alaria (Paralaria) mustelae Bosma, 1931 accepted as Paralaria mustelae (Bosma, 1931) Dubois, 1963 (redescription)
Alaria marcianae (La Rue, 1917) Walton, 1950 (redescription)
Alaria mustelae Bosma, 1931 accepted as Paralaria mustelae (Bosma, 1931) Dubois, 1963 (redescription)
Allassogonoporus vespertilionis Macy, 1940 accepted as Allassogonoporus marginalis Olivier, 1938 (redescription)
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)
Apatemon cobitidis (von Linstow, 1890) Vojtek, 1964 (redescription)
Apatemon gracilis (Rudolphi, 1819) Szidat, 1928 (redescription)
Apatemon intermedius (Johnston, 1904) Dubois, 1937 accepted as Australapatemon intermedius (Johnston, 1904) Sudarikov, 1959 (redescription)
Apatemon minor Yamaguti, 1933 accepted as Australapatemon minor (Yamaguti, 1933) (redescription)
Apatemon pellucidus Yamaguti, 1933 (biology source)
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)
Apharyngolevinseniella capitanea (Overstreet & Perry, 1972) Yamaguti, 1975 accepted as Levinseniella capitanea Overstreet & Perry, 1972 accepted as Levinseniella (Monarrhenos) capitanea Overstreet & Perry, 1972 (biology source)
Apharyngostrigea cornu (Zeder, 1800) Ciurea, 1927 (redescription)
Apharyngostrigea ibis Azim, 1935 (additional source)
Apharyngostrigea pipientis (Faust, 1918) Olivier, 1940 (redescription)
Apophallus bacalloti Morozov, 1952 (biology source)
Apophallus donicus (Skrjabin & Lindtrop, 1919) Price, 1931 (biology source)
Apophallus imperator Lyster, 1940 (biology source)
Apophallus itascensis Warren, 1953 (biology source)
Apophallus muehlingi (Jägerskiöld, 1899) Lühe, 1909 (redescription)
Apophallus venustus (Ransom, 1920) Cameron, 1936 (biology source)
Artyfechinostomum mehrai (Faruqui, 1930) Yadav, 1959 (redescription)
Artyfechinostomum sufrartyfex Lane, 1915 (biology source)
Ascocotyle branchialis Timon-David, 1961 (redescription)
Ascocotyle leighi Burton, 1956 (biology source)
Ascocotyle pachycystis Schroeder & Leigh, 1965 (redescription)
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)
Bolbophorus confusus (Krause, 1914) Dubois, 1935 (biology source)
Bolbophorus confusus levantinus Paperna & Lengy, 1963 accepted as Bolbophorus levantinus Paperna & Lengy, 1963 (redescription)
Brachycoelium mesorchium Byrd, 1937 (redescription)
Brachycoelium obesum Nicoll, 1914 (redescription)
Brachylaima erinacei Blanchard, 1847 (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)
Brachylaima oesophagei Shaldybin, 1953 (redescription)
Brachylaima recurvum Dujardin, 1845 (biology source)
Brachylaima spinosulum (Hofmann, 1899) Krull, 1933 (biology source)
Brachylaima suis Balozet, 1936 (redescription)
Brachylaima thompsoni (Sinitsin, 1931) Ubelaker & Dailey, 1966 (biology source)
Brachylaima virginianus (Dickerson, 1930) Krull, 1934 (redescription)
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 myadestis Carney, 1972 (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)
Bunoderina sacculata (Van Cleave & Mueller, 1932) Yamaguti, 1958 accepted as Bunodera sacculata Van Cleave & Mueller, 1932 (biology source)
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)

Brazil for Cotylurus (Cotyluroides) lutzi Basch, 1969 
Democratic Republic of the Congo for Clinostomum chabaudi Vercammen-Grandjean, 1960 
Japan for Megalophallus miyazakii Yamaguti, 1975 
New Zealand for Calicophoron ijimai (Fukui, 1922) Nasmark, 1937 
North Dakota for Apatemon pellucidus Yamaguti, 1933 
Oregon for Philophthalmus megalura (Cort, 1914) 
Tennessee for Diplostomulum ranae (Cort & Brackett, 1938)