Coeliotrema Yamaguti, 1938 (identification resource)
Coeliotrema thynni Yamaguti, 1938 (redescription)
Didymocystis Ariola, 1902 (identification resource)
Didymocystis thynni (Taschenberg, 1879) Dollfus, 1926 (redescription)
Didymocystis xiphiados (MacCallum & MacCallum, 1916) accepted as Maccallumtrema xiphiados (MacCallum & MacCallum, 1916) Yamaguti, 1970 (redescription)
Didymozoidae Monticelli, 1888 (identification resource)
Didymozoon Taschenberg, 1879 (identification resource)
Didymozoon auxis Taschenberg, 1879 (redescription)
Didymozoon pretiosus Ariola, 1902 (redescription)
Didymozoon serrani Monticelli, 1889 (additional source)
Didymozoon sphyraenae Taschenberg, 1879 (additional source)
Gonapodasmiinae Ishii, 1935 (identification resource)
Gonapodasmius Ishii, 1935 (identification resource)
Koellikeria Cobbold, 1860 (identification resource)
Koellikeria filicollis (Rudolphi, 1819) Cobbold, 1860 (redescription)
Koellikeriinae Ishii, 1935 (identification resource)
Metanematobothrium Yamaguti, 1938 (identification resource)
Metanematobothrium guernei (Moniez, 1891) Yamaguti, 1938 (redescription)
Nematobothriinae Ishii, 1935 (identification resource)
Nematobothrium van Beneden, 1858 (identification resource)
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 scombri (Taschenberg, 1879) Ishii, 1935 (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)