Acanthocollaritrema Travassos, Teixeira de Freitas & Bührnheim, 1965 (extant flag source)
Acanthocollaritrema Travassos, Teixeira de Freitas & Bührnheim, 1965 (basis of record)
Acanthocotyle Monticelli in Saggio, 1888 (extant flag source)
Acanthocotyle Monticelli in Saggio, 1888 (basis of record)
Accacladocoelium Odhner, 1928 (basis of record)
Accacladocoelium Odhner, 1928 (extant flag source)
Achillurbania (extant flag source)
Achillurbania (basis of record)
Aerobiotrema Yamaguti, 1958 (basis of record)
Aerobiotrema Yamaguti, 1958 (extant flag source)
Alaria Schrank, 1788 (extant flag source)
Alaria Schrank, 1788 (basis of record)
Albulatrema Yamaguti, 1965 (extant flag source)
Albulatrema Yamaguti, 1965 (basis of record)
Alcicornis MacCallum, 1917 (basis of record)
Alcicornis MacCallum, 1917 (extant flag source)
Allacanthocotylia (extant flag source)
Allacanthocotylia (basis of record)
Allassogonoporus Olivier, 1938 (extant flag source)
Allassogonoporus Olivier, 1938 (basis of record)
Allomicrocotyla Yamaguti, 1965 (extant flag source)
Allomicrocotyla Yamaguti, 1965 (basis of record)
Alloplectognathotrema Kamegai, 1970 (basis of record)
Alloplectognathotrema Kamegai, 1970 (extant flag source)
Allopseudodiclidophora Yamaguti, 1965 (extant flag source)
Allopseudodiclidophora Yamaguti, 1965 (basis of record)
Allopseudolevinseniella Yamaguti, 1971 (basis of record)
Allopseudolevinseniella Yamaguti, 1971 (extant flag source)
Allopyragraphorus Yamaguti, 1963 (basis of record)
Allopyragraphorus Yamaguti, 1963 (extant flag source)
Amblosoma Pojmanska, 1972 (basis of record)
Amblosoma Pojmanska, 1972 (extant flag source)
Anamonorchis Yamaguti, 1970 (extant flag source)
Anamonorchis Yamaguti, 1970 (basis of record)
Anchitrema Looss, 1899 (basis of record)
Anchitrema Looss, 1899 (extant flag source)
Anchorophorus Bychowsky & Nagibina, 1958 (extant flag source)
Anchorophorus Bychowsky & Nagibina, 1958 (basis of record)
Anenterotrema Stunkard, 1938 (extant flag source)
Anenterotrema Stunkard, 1938 (basis of record)
Anoplocotyloides Young, 1967 (extant flag source)
Anoplocotyloides Young, 1967 (basis of record)
Aphanhystera Guiart, 1938 accepted as Otodistomum Stafford, 1904 (extant flag source)
Aphanhystera Guiart, 1938 accepted as Otodistomum Stafford, 1904 (basis of record)
Arnola Strand, 1942 (extant flag source)
Arnola Strand, 1942 (basis of record)
Aspidogaster von Baer in Férussac, 1826 (extant flag source)
Aspidogaster von Baer in Férussac, 1826 (basis of record)
Asymphylodora Looss, 1899 (extant flag source)
Asymphylodora Looss, 1899 (basis of record)
Athesmia Looss, 1899 (extant flag source)
Athesmia Looss, 1899 (basis of record)
Auridistomum Stafford, 1905 (extant flag source)
Auridistomum Stafford, 1905 (basis of record)
Austromicrophallus Szidat, 1964 accepted as Levinseniella Stiles & Hassall in Ward, 1901 (basis of record)
Austromicrophallus Szidat, 1964 accepted as Levinseniella Stiles & Hassall in Ward, 1901 (extant flag source)
Aviella Sproston, 1946 accepted as Tetraonchus Diesing, 1858 (basis of record)
Aviella Sproston, 1946 accepted as Tetraonchus Diesing, 1858 (extant flag source)
Azygia Looss, 1899 (basis of record)
Azygia Looss, 1899 (extant flag source)
Balfouria Leiper, 1911 (extant flag source)
Balfouria Leiper, 1911 (basis of record)
Bathycotyle Darr, 1902 (basis of record)
Bathycotyle Darr, 1902 (extant flag source)
Batrachotrema Dollfus & Williams, 1966 (basis of record)
Batrachotrema Dollfus & Williams, 1966 (extant flag source)
Bianium Stunkard, 1930 (extant flag source)
Bianium Stunkard, 1930 (basis of record)
Bilaterocotyle Chauhan, 1945 (basis of record)
Bilaterocotyle Chauhan, 1945 (extant flag source)
Biovarium Yamaguti, 1934 (basis of record)
Biovarium Yamaguti, 1934 (extant flag source)
Bivesicula Yamaguti, 1934 (basis of record)
Bivesicula Yamaguti, 1934 (extant flag source)
Bivesiculoides Yamaguti, 1938 (extant flag source)
Bivesiculoides Yamaguti, 1938 (basis of record)
Bolbocephalodes Strand, 1935 (basis of record)
Bolbocephalodes Strand, 1935 (extant flag source)
Bothitrema Price, 1936 (basis of record)
Bothitrema Price, 1936 (extant flag source)
Botulisaccus Caballero, Bravo-Hollis & Grocott, 1955 (basis of record)
Botulisaccus Caballero, Bravo-Hollis & Grocott, 1955 (extant flag source)
Botulus Guiart, 1938 (basis of record)
Botulus Guiart, 1938 (extant flag source)
Brachycoelium Dujardin, 1844 (extant flag source)
Brachycoelium Dujardin, 1844 (basis of record)
Brahamputrotrema Dayal & Gupta, 1953 (basis of record)
Brahamputrotrema Dayal & Gupta, 1953 (extant flag source)
Braunina Heider, 1900 (basis of record)
Braunina Heider, 1900 (extant flag source)
Braunotrema Price, 1930 (extant flag source)
Braunotrema Price, 1930 (basis of record)
Brumptia Travassos, 1921 (extant flag source)
Brumptia Travassos, 1921 (basis of record)
Bucephaloides Hopkins, 1954 accepted as Prosorhynchoides Dollfus, 1929 (extant flag source)
Bucephaloides Hopkins, 1954 accepted as Prosorhynchoides Dollfus, 1929 (basis of record)
Bucephalus von Baer, 1827 (extant flag source)
Bucephalus von Baer, 1827 (basis of record)
Buckleytrema Gupta, 1956 (basis of record)
Buckleytrema Gupta, 1956 (extant flag source)