Allodidymocodium Yamaguti, 1970 (additional source)
Allodidymocodium euthynni Pozdnyakov, 1996 (original description)
Allonematobothrium Yamaguti, 1965 (additional source)
Allonematobothrium epinepheli Yamaguti, 1965 (redescription)
Colocyntotrema Yamaguti, 1951 (additional source)
Colocyntotrema auxis Yamaguti, 1951 (redescription)
Didymocystis Ariola, 1902 (additional source)
Didymocystis buccalis (Yamaguti, 1970) Pozdnyakov, 1990 (redescription)
Didymocystis exigua (Yamaguti, 1970) Podznyakov, 1990 (redescription)
Didymocystis ovata Ishii, 1935 (status source)
Didymodiclinus Pozdnyakov, 1993 (additional source)
Didymosulcus Pozdnyakov, 1990 (additional source)
Didymosulcus philobranchia (Yamaguti, 1970) Pozdnyakov, 1990 (redescription)
Didymosulcus soleiformis (Ishii, 1935) (status source)
Didymosulcus wedli (Ariola, 1902) (status source)
Didymozoidae Monticelli, 1888 (taxonomy source)
Didymozoon Taschenberg, 1879 (additional source)
Didymozoon gigas Ku & Shen, 1965 (status source)
Didymozoon platycephali Ku & Shen, 1965 accepted as Indodidymozoon platycephali (Ku & Shen, 1965) Anderson & Cribb, 1994 (status source)
Gonapodasmius Ishii, 1935 (additional source)
Koellikeria Cobbold, 1860 (additional source)
Koellikerioides Yamaguti, 1970 (additional source)
Koellikerioides orientalis (Yamaguti, 1934) Pozdnyakov, 1992 (redescription)
Lobatozoum Ishii, 1935 (additional source)
Lobatozoum sinicum (Shen, 1984) Pozdnyakov, 1996 (new combination reference)
Maccallozoum Ishii, 1935 (additional source)
Metanematobothrium Yamaguti, 1938 (additional source)
Nematobothrium van Beneden, 1858 (additional source)
Neometadidymozoon Yamaguti, 1971 (additional source)
Oesophagocystis Yamaguti, 1970 (additional source)
Oesophagocystis dissimilis (Yamaguti, 1938) Yamaguti, 1970 (redescription)
Paragonapodasmius Yamaguti, 1938 (additional source)
Wedlia Cobbold, 1860 (additional source)