• Acanthuritrema magnireceptaculum Yamaguti, 1970
• Acanthuritrema multivitellosum Yamaguti, 1970
• Accacladium arii Wang, 1982
• Accacladium nematulum Noble & Noble, 1937 accepted as Accacladium serpentulus Odhner, 1928 accepted as Accacladium serpentulum Odhner, 1928
• Accacladium serpentulum Odhner, 1928
• Accacladium serpentulus Odhner, 1928 accepted as Accacladium serpentulum Odhner, 1928
• Accacladocoelium alveolatum Robinson, 1934
• Accacladocoelium leontjevae Korotaeva, 1976 accepted as Paraccacladium leontjevae (Korotaeva, 1976) Bray & Gibson, 1977
• Accacladocoelium macrocotyle (Diesing, 1858) Robinson, 1934
• Accacladocoelium megnini (Poirier, 1885) Dollfus, 1946 accepted as Accacladocoelium nigroflavum (Rudolphi, 1819) Robinson, 1934
• Accacladocoelium nigroflavum (Rudolphi, 1819) Robinson, 1934
• Accacladocoelium petasiporum Odhner, 1928
• Accacoelium calyptrocotyle (Monticelli, 1893) Stiles & Hassall, 1908 accepted as Odhnerium calyptocotyle (Monticelli, 1893) Yamaguti, 1934
• Accacoelium contortum (Rudolphi, 1819) Looss, 1899
• Accacoelium foliatum (LInton, 1898) Stafford, 1904 accepted as Mneiodhneria foliata (Linton, 1898) Dollfus, 1935 accepted as Odhnerium calyptocotyle (Monticelli, 1893) Yamaguti, 1934
• Accacoelium macrocotyle (Diesing, 1858) Lühe, 1901 accepted as Accacladocoelium macrocotyle (Diesing, 1858) Robinson, 1934
• Accacoelium nigroflavum (Rudolphi, 1819) Lühe, 1901 accepted as Accacladocoelium nigroflavum (Rudolphi, 1819) Robinson, 1934
• Accacoelium pelagiae (Kölliker, 1849) Monticelli, 1893 (uncertain > taxon inquirendum)
• Acerointestinecola karachiensis Jahan, 1970 accepted as Stomachicola muraenesocis Yamaguti, 1934
• Adenodidymocystis intestinalis Yamaguti, 1970
• Adinosoma exodica (MacFarlane, 1936) Skrjabin & Guschanskaja, 1955 accepted as Lecithochirium exodicum MacFarlane, 1936
• Adinosoma gaevskaye Zubchenko, 1978
• Adinosoma hawaiiense (Yamaguti, 1970) Gibson & Bray, 1979
• Adinosoma japonica (Yamaguti, 1938) Skrjabin & Guschanskaja, 1955 accepted as Lecithochirium japonicum Yamaguti, 1938
• Adinosoma microstoma (Chandler, 1935) Skrjabin & Gushanskaja, 1955 accepted as Lecithochirium microstomum Chandler, 1935
• Adinosoma robusta (Manter, 1934) Manter, 1947
• Aerobiotrema acinovaria Tang, 1981
• Aerobiotrema muraenesocis Yamaguti, 1958
• Ahemiurus karachii (Srivastava, 1941) Chauhan, 1953 accepted as Opisthadena karachii (Srivastava, 1941) Skrjabin & Guschanskaja, 1955
• Albulatrema ovale Yamaguti, 1965
• Allodidymocodium euthynni Pozdnyakov, 1996
• Allodidymocodium kawakawa (Yamaguti, 1970) Pozdnyakov, 1996 accepted as Opepherocystis kawakawa Yamaguti, 1970
• Allodidymocodium unitubulare Yamaguti, 1970
• Allodidymozoon apharyngi (Job, 1961) Madhavi, 1982 accepted as Didymocylindrus apharyngi (Job, 1961) Pozdnyakov, 1996
• Allodidymozoon cylindricum Madhavi, 1982 accepted as Didymocylindrus cylindricus (Madhavi, 1982)
• Allodidymozoon gasterale Abdul-Salam & Sreelatha, 1995 accepted as Didymocylindrus gasteralis (Abdul-Salam & Sreelatha, 1995) Pozdnyakov, 1996
• Allodidymozoon operculare Madhavi, 1982 accepted as Didymocylindrus opercularis (Madhavi, 1982) Pozdnyakov, 1996
• Allodidymozoon pharyngi Abdul-Salam & Sreelatha, 1995 accepted as Didymocylindrus pharyngi (Abdul-Salam & Sreelatha, 1995)
• Allodidymozoon sphyraenae Yamaguti, 1959 accepted as Didymocylindrus sphyraenae (Yamaguti, 1959) Pozdnyakov, 1996
• Allodidymozoon trilobata Abdul-Salam & Sreelatha, 1995 accepted as Didymocylindrus trilobatus (Abdul-Salam & Sreelatha, 1995)
• Allogenarchopsis bareilliensis Gupta, Gupta & Urabe, 2016
• Allogenarchopsis problematica (Faust, 1924) Urabe & Shimazu, 2013
• Allogenarchopsis yaritanago (Shimazu, Urabe & Grygier, 2011) Urabe & Shimazu, 2013 accepted as Allogenarchopsis problematica (Faust, 1924) Urabe & Shimazu, 2013
• Allometanematobothrioides lepidocybii Yamaguti, 1965
• Allonematobothrioides baueri Nikolaeva & Tkachuk, 1986
• Allonematobothrioides hirosaba Pozdnyakov, 1988
• Allonematobothrioides scombri Yamaguti, 1970
• Allonematobothrium apharei Yamaguti, 1970
• Allonematobothrium epinepheli Yamaguti, 1965
• Allonematobothrium ghanense Fischthal & Thomas, 1968
• Allonematobothrium ghanensis Fischthal & Thomas, 1968 accepted as Allonematobothrium ghanense Fischthal & Thomas, 1968
• Allonematobothrium megalaspi Pozdnyakov, 1996
• Allonematobothrium xishaense Gu & Shen, 1983
• Allonematobothrium yucatanense Moravec, Vidal-Martínez, Vargas-Vázquez, Vivas-Rodríguez, González-Solís, Mendoza-Franco, Simá-Alvarez & Güemez-Ricalde, 1997
• Allopseudocolocyntotrema alioshkini Pozdnyakov, 1994
• Allopseudocolocyntotrema claviforme Yamaguti, 1970
• Allostomachicola chirocentri Jehan & Azam, 1975
• Allostomachicola lepturusi (Gupta & Gupta, 1976) Gupta & Singh, 1985
• Allostomachicola mugili Bilqees & Khan, 1993
• Allostomachicola rauschi (Gupta & Ahmad, 1978) Gupta & Singh, 1985
• Allostomachicola secundus (Srivastava, 1939) Yamaguti, 1958
• Allotangiopsis shanghaiensis (Yeh & Wu, 1955) Yamaguti, 1971
• Anadichadena binoyi Dutta, 1995 accepted as Lecithaster binoyi (Dutta, 1995)
• Anahemiurus manteri Dutta, 1995 accepted as Parahemiurus manteri (Dutta, 1995)
• Anahemiurus microcercus Manter, 1947 accepted as Parahemiurus microcercus (Manter, 1947)
• Anahemiurus trachuri Kurashvili, 1958 accepted as Parahemiurus trachuri (Kurashvili, 1958)
• Anaplerurus thynnusi Srivastava & Sahai, 1978 accepted as Lecithochirium thynnusi (Srivastava & Sahai, 1978)
• Angionematobothrium cephalodomus Nikolaeva & Dubina, 1985
• Angionematobothrium jugulare Yamaguti, 1970
• Anguillotrema papillatum Chin & Ku, 1974
• Annulocystis auxis Yamaguti, 1970
• Annulocystis katsuwoni (Yamaguti, 1970) Pozdnyakov, 1996
• Aphanhystera monacensis Guiart, 1938 accepted as Otodistomum cestoides (Van Beneden, 1870) Odhner, 1911
• Aphanuroides lethrini Nagaty & Abdel-Aal, 1962
• Aphanurus bailloni Nagaty & Abdel-Aal, 1962
• Aphanurus balticus Slusarski, 1957
• Aphanurus caesionis Yamaguti, 1952
• Aphanurus dorosomatis Yamaguti, 1953
• Aphanurus dussumierii Hussain, Hanumantha Rao & Shyamasundari, 1984
• Aphanurus harengulae Yamaguti, 1938
• Aphanurus laguncula accepted as Aponurus laguncula Looss, 1907
• Aphanurus magniprotesticus (Tang, Shi & Pan in Tang, Shi & Cao Hua, 1983) Liu, Peng, Gao, Fu, Wu, Lu, Gao & Xiao, 2010
• Aphanurus microrchis Chauhan, 1945
• Aphanurus monolecithus (Srivastava, 1941) Manter, 1947 accepted as Aphanurus stossichii (Monticelli, 1891) Looss, 1907
• Aphanurus mugilus Tang, 1981
• Aphanurus multiprostatus Pan, 1984
• Aphanurus orientalis Liu, 1995
• Aphanurus pimelopteri Ramadan, 1985 accepted as Opisthadena dimidia Linton, 1910
• Aphanurus stossichii (Monticelli, 1891) Looss, 1907
• Aphanurus tuberculatus Hafeezullah, 1981
• Aphanurus virgula Looss, 1907
• Aphanurus xiamenensis Liu, 1995
• Apoblema appendiculatum (Rudolphi, 1802) Dujardin, 1845 accepted as Hemiurus appendiculatus (Rudolphi, 1802) Looss, 1899
• Apoblema crenatum (Rudolphi, 1819) Juel, 1889 accepted as Brachyphallus crenatus (Rudolphi, 1802) Odhner, 1905
• Apoblema excisum (Rudolphi, 1819) Juel, 1889 accepted as Lecithocladium excisum (Rudolphi, 1819) Lühe, 1901
• Apoblema microporum (Monticelli, 1889) Monticelli, 1891 accepted as Hemiurus microporum (Monticelli, 1889) Looss, 1899 accepted as Botulus microporus (Monticelli, 1889) Gibson & Bray, 1977
• Apoblema mollissimum (Levinsen, 1881) Juel, 1889 accepted as Lecithaster gibbosus (Rudolphi, 1802) Lühe, 1901
• Apoblema ocreatum (Rudolphi, 1802) Dujardin, 1845 accepted as Hemiurus luehei Odhner, 1905
• Apoblema rufoviride (Rudolphi, 1819) Juel, 1889 accepted as Lecithochirium rufoviride (Rudolphi, 1819) Lühe, 1901
• Apoblema stossichii Monticelii, 1891 accepted as Hemiurus stossichii (Monticelli, 1891) accepted as Aphanurus stossichii (Monticelli, 1891) Looss, 1907