Atalostrophion MacCallum, 1915 (identification resource)
Atalostrophion biovarium Skrjabin, 1955 accepted as Procerozoum biovarium (Skrjabin, 1955) Pozdyakov, 1996 (original description)
Atalostrophion promicrops MacCallum, 1915 (additional source)
Atalostrophion sardae MacCallum, 1915 (redescription)
Coeliotrema Yamaguti, 1938 (identification resource)
Coeliotrema thynni Yamaguti, 1938 (redescription)
Didymocylindrus Ishii, 1935 (identification resource)
Didymocylindrus filiformis Ishii, 1935 (redescription)
Didymocystis Ariola, 1902 (identification resource)
Didymocystis abdominalis Yamaguti, 1938 (redescription)
Didymocystis acanthocybii Yamaguti, 1938 (redescription)
Didymocystis alalongae Yamaguti, 1938 (redescription)
Didymocystis bilobata Ishii, 1935 (redescription)
Didymocystis coatesi Nigrelli, 1939 accepted as Didymocystis acanthocybii Yamaguti, 1938 (redescription)
Didymocystis crassa Ishii, 1935 (redescription)
Didymocystis dissimilis Yamaguti, 1938 accepted as Oesophagocystis dissimilis (Yamaguti, 1938) Yamaguti, 1970 (redescription)
Didymocystis miliaris Yamaguti, 1938 (redescription)
Didymocystis opercularis Yamaguti, 1938 (redescription)
Didymocystis ovata Ishii, 1935 (redescription)
Didymocystis scomberomori (MacCallum & MacCallum, 1916) Pozdnyakov, 1990 (redescription)
Didymocystis semiglobularis Ishii, 1935 (redescription)
Didymocystis simplex Ishii, 1935 accepted as Didymocylindrus simplex (Ishii, 1935) Yamaguti, 1970 (redescription)
Didymocystis soleiformis Ishii, 1935 accepted as Didymosulcus soleiformis (Ishii, 1935) (redescription)
Didymocystis submentalis Yamaguti, 1938 (redescription)
Didymocystis thynni (Taschenberg, 1879) Dollfus, 1926 (redescription)
Didymocystis wedli Ariola, 1902 accepted as Didymosulcus wedli (Ariola, 1902) (redescription)
Didymocystis xiphiados (MacCallum & MacCallum, 1916) accepted as Maccallumtrema xiphiados (MacCallum & MacCallum, 1916) Yamaguti, 1970 (redescription)
Didymoproblema Ishii, 1935 accepted as Didymocylindrus Ishii, 1935 (identification resource)
Didymoproblema fusiforme Ishii, 1935 accepted as Didymocylindrus fusiformis (Ishii, 1935) Pozdnyakov, 1966 (redescription)
Didymozoidae Monticelli, 1888 (identification resource)
Didymozoon Taschenberg, 1879 (identification resource)
Didymozoon auxis Taschenberg, 1879 (redescription)
Didymozoon branchiale Yamaguti, 1938 accepted as Indodidymozoon branchiale (Yamaguti, 1938) Anderson & Cribb, 1994 (redescription)
Didymozoon brevicolle Yamaguti, 1938 accepted as Indodidymozoon brevicolle (Yamaguti, 1938) Anderson & Cribb, 1994 (redescription)
Didymozoon filicolle Ishii, 1935 (redescription)
Didymozoon koti Yamaguti, 1938 accepted as Indodidymozoon koti (Yamaguti, 1938) Anderson & Cribb, 1994 (redescription)
Didymozoon longicolle Ishii, 1935 (redescription)
Didymozoon minor Yamaguti, 1934 (redescription)
Didymozoon pretiosus Ariola, 1902 (redescription)
Didymozoon serrani Monticelli, 1889 (additional source)
Didymozoon sphyraenae Taschenberg, 1879 (additional source)
Didymozoon spirale Yamaguti, 1938 accepted as Helicodidymozoon spirale (Yamaguti, 1938) Anderson & Cribb, 1994 (redescription)
Diplotrema Yamaguti, 1938 accepted as Neodiplotrema Yamaguti, 1938 (identification resource)
Diplotrema pelamydis Yamaguti, 1938 accepted as Neodiplotrema pelamydis (Yamaguti, 1938) Yamaguti, 1970 (redescription)
Glomeritrema Yamaguti, 1942 (additional source)
Gonapodasmiinae Ishii, 1935 (identification resource)
Gonapodasmius Ishii, 1935 (identification resource)
Gonapodasmius cypseluri Yamaguti, 1940 accepted as Didymodiclinus cypseluri (Yamaguti, 1940) Pozdnyakov, 1994 (redescription)
Gonapodasmius haemuli (MacCallum & MacCallum, 1916) Ishii, 1935 (redescription)
Gonapodasmius okushimai Ishii, 1935 accepted as Paragonapodasmius okushimae (Ishii, 1935) Pozdnyakov, 1994 (redescription)
Gonapodasmius pacificus Yamaguti, 1938 accepted as Didymodiclinus pacificus (Yamaguti, 1938) Pozdnyakov, 1993 (redescription)
Koellikeria Cobbold, 1860 (identification resource)
Koellikeria filicollis (Rudolphi, 1819) Cobbold, 1860 (redescription)
Koellikeriinae Ishii, 1935 (identification resource)
Lobatozoum Ishii, 1935 (identification resource)
Lobatozoum multisacculatum Ishii, 1935 (redescription)
Metanematobothrium Yamaguti, 1938 (identification resource)
Metanematobothrium guernei (Moniez, 1891) Yamaguti, 1938 (redescription)
Nematobothriinae Ishii, 1935 (identification resource)
Nematobothrium van Beneden, 1858 (identification resource)
Nematobothrium (Maclarenozoum) Ishii, 1935 accepted as Nematobothrium van Beneden, 1858 (identification resource)
Nematobothrium (Maclarenozoum) lampridis Yamaguti, 1940 accepted as Nematobothrium lampridis Yamaguti, 1940 accepted as Metadidymocystis lampridis (Yamaguti, 1940) Pozdnyakov, 1996 (redescription)
Nematobothrium (Maclarenozoum) molae (Maclaren, 1903) Ishii, 1935 accepted as Nematobothrium molae Maclaren, 1904 (redescription)
Nematobothrium (Maclarenozoum) pristipomatis Yamaguti, 1934 accepted as Nematobothrium pristipomatis Yamaguti, 1934 accepted as Didymodiclinus pristipomatis (Yamaguti, 1934) Pozdnyakov, 1994 (redescription)
Nematobothrium faciale (Baylis, 1938) Skrjabin, 1955 accepted as Didymodiclinus facialis (Baylis, 1938) Pozdnyakov, 1996 (redescription)
Nematobothrium faciale (Baylis, 1938) Skrjabin, 1955 accepted as Didymodiclinus facialis (Baylis, 1938) Pozdnyakov, 1996 (new combination reference)
Nematobothrium filarina Van Beneden, 1858 (redescription)
Nematobothrium filiforme Yamaguti, 1934 (redescription)
Nematobothrium okujimai Dollfus, 1935 (additional source)
Nematobothrium pelamydis (Taschenberg, 1879) Ishii, 1935 accepted as Unitubulotestis pelamydis (Taschenburg, 1879) Nikolaeva, 1980 (redescription)
Nematobothrium sabae Ishii, 1935 accepted as Nematobothrium filiforme Yamaguti, 1934 (redescription)
Nematobothrium sardae MacCallum & MacCallum, 1916 accepted as Unitubulotestis pelamydis (Taschenburg, 1879) Nikolaeva, 1980 (redescription)
Nematobothrium scombri (Taschenberg, 1879) Ishii, 1935 (redescription)
Paragonapodasmius Yamaguti, 1938 (identification resource)
Paragonapodasmius managatuwo Yamaguti, 1938 (redescription)
Philopinna Yamaguti, 1936 (identification resource)
Philopinna higai Yamaguti, 1936 (redescription)
Platocystis Yamaguti, 1938 (identification resource)
Platocystis alalongae Yamaguti, 1938 (redescription)
Tricharrhen Poche, 1926 accepted as Koellikeria Cobbold, 1860 (identification resource)
Tricharrhen okenii (Koelliker, 1847) Poche, 1926 accepted as Koellikeria okenii (Koelliker, 1847) Ariola, 1906 accepted as Koellikeria filicollis (Rudolphi, 1819) Cobbold, 1860 (additional source)
Wedlia Cobbold, 1860 (identification resource)
Wedlia bipartita (Wedl, 1855) Cobbold, 1860 (redescription)
Wedlia globosa Ishii, 1935 (redescription)
Wedlia orientalis Yamaguti, 1934 accepted as Koellikerioides orientalis (Yamaguti, 1934) Pozdnyakov, 1992 (redescription)
Wedlia reniformis Ishii, 1935 (redescription)