• Absonifibula bychowskyi Lawler & Overstreet, 1976
• Acanthocotyle borealis Brinkmann, 1940 accepted as Acanthocotyle verrilli Goto, 1899
• Acanthocotyle elegans Monticelli, 1890
• Acanthocotyle greeni Macdonald & Llewellyn, 1980
• Acanthocotyle lobianchi Monticelli, 1888
• Acanthocotyle monticellii Scott, 1902 (uncertain > taxon inquirendum)
• Acanthocotyle oligoterus Monticelli, 1899 accepted as Acanthocotyle lobianchi Monticelli, 1888
• Acanthocotyle verrilli Goto, 1899
• Allencotyla mcintoshi Price, 1962
• Allodiclidophora charcoti (Dollfus, 1922) Yamaguti, 1963
• Allodiclidophora squillarum (Parona & Perugia, 1889) Yamaguti, 1963
• Allogastrocotyle bivaginalis Nasir & Fuentes Zambrano, 1984
• Allogastrocotyle dillonhargisorum Bouguerche, Tazerouti, Gey & Justine, 2020
• Allopseudaxine macrova (Unnithan, 1957) Price, 1962
• Amphibdella flavolineata MacCallum, 1916
• Amphibdella paronaperugiae Llewellyn, 1960
• Amphibdella torpedinis Chatin, 1874
• Amphibdelloides benhassinae Tazerouti, Neifar & Euzet, 2006
• Amphibdelloides kechemirae Tazerouti, Neifar & Euzet, 2006
• Amphibdelloides maccallumi (Johnston & Tiegs, 1922) Price, 1937
• Amphibdelloides vallei Llewellyn, 1960
• Ancyrocephalus cobitis Ergens, 1963 accepted as Haliotrema cobitis (Ergens, 1963) Merella, Dmitrieva, Piras, Huyse, Gerasev & Garippa, 2010 accepted as Xenoligophoroides cobitis (Ergens, 1963) Dmitrieva, Sanna, Piras, Garippa & Merella, 2018
• Ancyrocephalus paradoxus Creplin, 1839
• Ancyrocephalus parvus Linton, 1940 accepted as Hemirhamphiculus parvus (Linton, 1940) Kritsky & Bakenhaster, 2024
• Ancyrocotyle vallei (Parona & Perugia, 1895) Parona & Monticelli, 1903
• Anoplodiscus richiardii Sonsino, 1890
• Anthocotyle americana MacCallum, 1916
• Anthocotyle americanus MacCallum, 1916 accepted as Anthocotyle americana MacCallum, 1916
• Anthocotyle merluccii Van Beneden & Hesse, 1863
• Anthocotyle radkeaminorum Bouguerche, 2025
• Aspinatrium euzeti Ktari, 1971 accepted as Pseudoaspinatrium euzeti (Ktari, 1971) Mamaev, 1986 accepted as Pauciconfibula euzeti (Ktari, 1971) Chisholm, Beverley-Burton & McAlpine, 1991
• Aspinatrium gallieni Euzet & Ktari, 1971 accepted as Pseudoaspinatrium gallieni (Euzet & Ktari, 1971) Mamaev, 1986
• Aspinatrium spari (Yamaguti, 1937) Yamaguti, 1963
• Aspinatrium trachini (Parona & Perugia, 1889) Yamaguti, 1963 accepted as Bradyhaptorus trachini (Parona & Perugia, 1890) Unnithan, 1971 accepted as Pauciconfibula trachini (Parona & Perugia, 1889) Dilllon & Hargis, 1965
• Atriaster acanthopagri Mamaev & Parukhin, 1975
• Atriaster bifidacanthus Mamaev & Parukhin, 1975
• Atriaster heterodus Lebedev & Parukhin, 1969
• Atriaster maillardi Lopez-Roman & De Armas Hernandez, 1989
• Atriaster spinifer Mamaev & Parukhin, 1975
• Atrispinum acarne Maillard & Noisy, 1979
• Atrispinum labracis (Van Beneden & Hesse, 1863) Winch, 1983 accepted as Serranicotyle labracis (Van Beneden & Hesse, 1863) Maillard, Euzet & Silan, 1988
• Atrispinum mormyri (Lorenz, 1878) Orecchia & Paggi, 1983 accepted as Pagellicotyle mormyri (Lorenz, 1878) Mamev, 1984 accepted as Bychowskicotyla mormyri (Lorenz, 1878) Unnithan, 1971
• Atrispinum salpae (Parona & Perugia, 1890) Maillard & Noisy, 1979
• Atrispinum sargi (Parona & Perugia, 1890) Euzet & Maillard, 1974
• Atrispinum seminalis (Euzet & Maillard, 1973)
• Axine belones Abildgaard, 1794
• Axine hyporhampi Price, 1962
• Axinoides euzeti Châari, Derbel & Neifar, 2016
• Axinoides gracilis (Linton, 1940) Sproston, 1946 accepted as Nudaciraxine gracilis (Linton, 1940) Price, 1962
• Axinoides strongylurae Price, 1962
• Benedenia innobilitata Burnheim, Gomes & Varela, 1973
• Benedenia leucanthemum Euzet & Maillard, 1967 accepted as Trimusculotrema leucanthemum (Euzet & Maillard, 1967) Whittington & Barton, 1990
• Benedenia micracantha Euzet & Maillard, 1967 accepted as Trimusculotrema micracantha (Euzet & Maillard, 1967) Whittington & Barton, 1990
• Benedenia monticellii (Parona & Perugia, 1895) Johnston, 1929
• Benedenia pompatica Burnheim, Gomes & Varela, 1973
• Benedenia posterocolpa Hargis, 1955 accepted as Benedeniella posterocolpa (Hargis, 1955) Yamaguti, 1963 accepted as Parabenedeniella posterocolpa (Hargis, 1955) Brule & Bullard in Brule, Warren & Bullard, 2026
• Benedenia sciaenae (Van Beneden, 1852) Odhner, 1905
• Benedeniella posterocolpa (Hargis, 1955) Yamaguti, 1963 accepted as Parabenedeniella posterocolpa (Hargis, 1955) Brule & Bullard in Brule, Warren & Bullard, 2026
• Bicotylophora trachinoti (MacCallum, 1921) Price, 1936
• Bivagina alcedinis (Parona & Perugia, 1889) Yamaguti, 1963
• Bivagina centrodonti (Brown, 1929) Mamaev & Parukhin, 1975
• Bivagina pagrosomi (Murray, 1931) Dillon & Hargis, 1965
• Bothitrema bothi (MacCallum, 1913) Price, 1936
• Bradyhaptorus trachini (Parona & Perugia, 1890) Unnithan, 1971 accepted as Pauciconfibula trachini (Parona & Perugia, 1889) Dilllon & Hargis, 1965
• Bychowskicotyla mormyri (Lorenz, 1878) Unnithan, 1971
• Caballerocotyla abidjani Bussieras & Baudin-Laurencin, 1970 accepted as Capsala biparasitica (Goto, 1894) Price, 1938
• Caballerocotyla manteri (Price, 1951) Price, 1960 accepted as Capsala manteri Price, 1951
• Caballerocotyla pelamydis (Taschenberg, 1878) Price, 1960 accepted as Capsala pelamydis (Taschenberg, 1878) Johnston, 1929
• Caballerocotyla pseudomagronum Busserias, 1972 accepted as Capsala magronum (Ishii, 1936) Price, 1938
• Caballerocotyla verrucosa Busserias, 1972 accepted as Capsala paucispinosa (Mamaev, 1968) Chisholm & Whittington, 2007
• Cadenatia polytestis Euzet & Maillard, 1967 accepted as Neodermophthirius harkemai Price, 1963
• Calceostoma calceostoma (Wagener, 1857) Johnston & Tiegs, 1922
• Calceostoma glandulosum Johnston & Tiegs, 1922
• Calceostoma herculanea Euzet & Vala, 1976
• Calceostoma paronai Gupta & Sachdeva, 1992
• Calceostomella inermis (Parona & Perugia, 1889) Palombi, 1943
• Calicobenedenia polyprioni Kritsky & Fennessy, 1999
• Calicotyle affinis Scott, 1911
• Calicotyle carmenae Higueruelo, Dallarés & Schaeffner, 2026
• Calicotyle kroyeri Diesing, 1850
• Calicotyle palombi Euzet & Williams, 1960
• Calicotyle stossichi Braun, 1899
• Calicotyle vicina Neifar, Euzet & Ben Hassine, 2001
• Capsala biparasitica (Goto, 1894) Price, 1938
• Capsala grimaldii (Guiart, 1938) Sproston, 1946 accepted as Capsala martinieri Bosc, 1811
• Capsala interrupta (Monticelli, 1891) Johnston, 1929
• Capsala katsuwoni (Ishii, 1936) Price, 1938
• Capsala laevis (Verrill, 1875) Johnston, 1929
• Capsala maccallumi Price, 1939
• Capsala magronum (Ishii, 1936) Price, 1938
• Capsala manteri Price, 1951
• Capsala martinieri Bosc, 1811
• Capsala nozawae (Goto, 1894) Price, 1938
• Capsala onchidiocotyle (Setti, 1899) Johnston, 1929
• Capsala paucispinosa (Mamaev, 1968) Chisholm & Whittington, 2007
• Capsala pelamydis (Taschenberg, 1878) Johnston, 1929
• Capsala thynni (Guiart, 1938) Sproston, 1946
• Capsaloides cornutus (Verrill, 1875) Price, 1938
• Capsaloides perugiai (Setti, 1898) Price, 1938
• Cathariotrema selachii (MacCallum, 1916) Johnston & Tiegs, 1922