Caudotestis Issaitschikov, 1928 (identification resource)
Caudotestis glacialis (Zdzitowiecki, 1989) Cribb, 2005 (new combination reference)
Caudotestis kerguelensis (Prudhoe & Bray, 1973) Cribb, 2005 (new combination reference)
Discoverytrema Gibson, 1976 (identification resource)
Helicometra Odhner, 1902 (identification resource)
Macvicaria Gibson & Bray, 1982 (identification resource)
Neolebouria Gibson, 1976 (identification resource)
Opecoelidae Ozaki, 1925 (identification resource)
Opecoelinae Ozaki, 1925 (identification resource)
Opegaster Ozaki, 1928 (identification resource)
Plagioporinae Manter, 1947 (identification resource)
Plagioporus Stafford, 1904 (identification resource)
Podocotyle Dujardin, 1845 (identification resource)
Stenakridae Yamaguti, 1970 (identification resource)
Stenakron Stafford, 1904 (identification resource)