Allopodocotyle Pritchard, 1966 (identification resource)
Anisorchis opisthorchis Polyanski, 1955 accepted as Caudotestis opisthorchis (Polyanski, 1955) Cribb, 2005 (source of synonymy)
Anomalotrema Zhukov, 1957 (identification resource)
Bathycreadium Kabata, 1961 (identification resource)
Cainocreadium Nicoll, 1909 (identification resource)
Caudotestis Issaitschikov, 1928 (identification resource)
Caudotestis opisthorchis (Polyanski, 1955) Cribb, 2005 (new combination reference)
Gaevskajatrema Gibson & Bray, 1982 (identification resource)
Genitocotyle Park, 1937 (identification resource)
Hamacreadium Linton, 1910 (identification resource)
Helicometra Odhner, 1902 (identification resource)
Macvicaria Gibson & Bray, 1982 (identification resource)
Neonotoporus Srivastava, 1942 (identification resource)
Nicolla Wisniewski, 1934 (identification resource)
Opecoelidae Ozaki, 1925 (identification resource)
Opecoelina Manter, 1934 (identification resource)
Opecoelinae Ozaki, 1925 (identification resource)
Opecoelininae Gibson & Bray, 1984  (identification resource)
Opecoeloides Odhner, 1928 (identification resource)
Pachycreadium Manter, 1954 (identification resource)
Peracreadium Nicoll, 1909 (new combination reference)
Plagioporinae Manter, 1947 (identification resource)
Plagioporus Stafford, 1904 (identification resource)
Podocotyle Dujardin, 1845 (identification resource)
Poracanthium Dollfus, 1948 (identification resource)
Pseudopecoelus von Wicklen, 1946 (identification resource)
Pseudopycnadena Saad-Fares & Maillard, 1986 (identification resource)
Pycnadenoides Yamaguti, 1938 (identification resource)
Sphaerostoma Rudolphi, 1809 (identification resource)
Stenakridae Yamaguti, 1970 (identification resource)
Stenakron Stafford, 1904 (identification resource)
Tellervotrema Gibson & Bray, 1982 (identification resource)