Anthocotyle merluccii Van Beneden & Hesse, 1863 (additional source)
Capsala martinieri Bosc, 1811 (additional source)
Diclidophoroides maccallumi Price, 1943 accepted as Diclidophora maccallumi (Price, 1943) Sproston, 1946 (additional source)
Diclybothrium armatum Leuckart, 1835 (additional source)
Discocotyle sagittata (Leuckart, 1842) Diesing, 1850 (additional source)
Entobdella curvunca Ronald, 1957 accepted as Entobdella hippoglossi (Müller, 1776) Blainville, 1818 (basis of record)
Gyrodactylus adspersi Cone & Wiles, 1983 (basis of record)
Gyrodactylus groenlandicus Levinsen, 1881 (basis of record)
Gyrodactylus pleuronecti Cone, 1981 (basis of record)
Gyrodactylus salmonis Yin & Sproston, 1948 (basis of record)
Laminiscus gussevi (Bychowsky & Polyansky, 1953) Pálsson & Beverely-Burton, 1983 (additional source)
Macruricotyle newfoundlandiae Campbell, Correia & Haedrich, 1982 (basis of record)
Microbothrium apiculatum Olsson, 1869 (additional source)
Microcotyle poronoti MacCallum, 1915 (additional source)
Micropharynx parasitica Jägerskiöld, 1896 (additional source)
Nitzschia sturionis (Abildgaard, 1794) Krøyer, 1852 (additional source)
Pseudacanthocotyla verrilli (Goto, 1899) Yamaguti, 1963 accepted as Acanthocotyle verrilli Goto, 1899 (additional source)
Rajonchocotyle emarginata (Olsson, 1876) Sproston, 1946 (additional source)
Salsuginus angularis (Mueller, 1934) Beverley-Burton, 1984 (basis of record)
Salsuginus fundulus (Mizelle, 1940) Beverley-Burton, 1984 (basis of record)
Squalonchocotyle abbreviata (Olsson, 1876) Cerfontaine, 1899 (additional source)
Tristoma coccineum Cuvier, 1817 (additional source)
Tristoma integrum Diesing, 1850 (additional source)
Udonella caligorum Johnston, 1835 (additional source)