Opinions from L. B. Tarlo 1960
- 'Liopleurodon belongs to Pliosauridae'
- 'Liopleurodon ferox belongs to Liopleurodon'
- 'Peloneustes belongs to Pliosauridae'
- 'Peloneustes irigisensis is recombined as Pliosaurus irgisensis'
- 'Pleiosaurus macromerus is recombined as Stretosaurus macromerus'
- 'Plesiosaurus (Pleiosaurus) was reranked as Pliosaurus and belongs to Pliosauridae'
- 'Plesiosaurus (Pleiosaurus) brachydeirus is recombined as Pliosaurus brachydeirus'
- 'Plesiosaurus brachyspondylus is recombined as Pliosaurus brachyspondylus'
- 'Plesiosaurus giganteus is a nomen nudum'
- 'Plesiosaurus nitidus belongs to Plesiosaurus' according to Phillips 1871
- 'Plesiosaurus philarchus is recombined as Peloneustes philarchus'
- 'Plesiosaurus recentior is a nomen nudum'
- 'Pliosauridae belongs to Plesiosauria'
- 'Pliosaurus aequalis is a nomen dubium'
- 'Pliosaurus andrewsi belongs to Pliosaurus'
- 'Pliosaurus evansi is a subjective synonym of Peloneustes philarchus'
- 'Pliosaurus gamma [misspelled as Pleiosaurus gamma] belongs to Pliosaurus' according to Phillips 1871
- 'Pliosaurus gamma belongs to Pliosaurus'
- 'Pliosaurus nitidus is a subjective synonym of Pliosaurus brachyspondylus'
- 'Pliosaurus pachydeirus is recombined as Liopleurodon pachydeirus'
- 'Pliosaurus rossicus belongs to Pliosaurus'
- 'Pliosaurus wosinskii belongs to Pliosaurus' according to Fischer de Waldheim 1846
- 'Pliosaurus wosinskii is a subjective synonym of Pliosaurus brachyspondylus'
- 'Polyptychodon archiaci belongs to Polyptychodon' according to Deslongchamps 1872
- 'Polyptychodon archiaci is a subjective synonym of Stretosaurus macromerus'
- 'Simolestes belongs to Pliosauridae'
- 'Simolestes nowackianus belongs to Simolestes' according to Huene 1938
- 'Simolestes vorax belongs to Simolestes'
- 'Spondylosaurus frearsi belongs to Spondylosaurus' according to Fischer de Waldheim 1845
- 'Spondylosaurus frearsi is a subjective synonym of Pliosaurus brachyspondylus'
- 'Stretosaurus belongs to Pliosauridae'
- 'Thaumatosaurus calloviensis belongs to Thaumatosaurus' according to Bogolubov 1912
- 'Thaumatosaurus calloviensis is a subjective synonym of Simolestes vorax'