Opinions from F. R. O'Keefe 2001

  • 'Alzadasaurus colombiensis is recombined as Callawayasaurus colombiensis'
  • 'Attenborosaurus belongs to Pliosauroidea'
  • 'Augustasaurus belongs to Pistosauridae'
  • 'Augustasaurus hagdorni belongs to Augustasaurus' according to Sander et al. 1997
  • 'Augustasaurus hagdorni belongs to Augustasaurus'
  • 'Brachauchenius belongs to Pliosauridae'
  • 'Brachauchenius lucasi belongs to Brachauchenius' according to Williston 1903
  • 'Brachauchenius lucasi belongs to Brachauchenius'
  • 'Brancasaurus belongs to Elasmosauridae'
  • 'Brancasaurus brancai belongs to Brancasaurus'
  • 'Callawayasaurus belongs to Elasmosauridae'
  • 'Cimoliasauridae belongs to Tricleidia'
  • 'Cimoliosaurus snowii is recombined as Styxosaurus snowii' according to Welles 1943
  • 'Cimoliosaurus snowii is recombined as Styxosaurus snowii'
  • 'Cryptocleidoidea belongs to Euplesiosauria'
  • 'Cryptoclididae belongs to Cryptocleidoidea'
  • 'Cymatosaurus belongs to Pistosauria'
  • 'Cymatosaurus fridericianus belongs to Cymatosaurus' according to Frtisch 1894
  • 'Cymatosaurus fridericianus belongs to Cymatosaurus'
  • 'Dolichorhynchops belongs to Polycotylidae'
  • 'Dolichorhynchops osborni belongs to Dolichorhynchops'
  • 'Elasmosauridae belongs to Euplesiosauria'
  • 'Elasmosaurus morgani is recombined as Libonectes morgani'
  • 'Eosauropterygia belongs to Sauropterygia'
  • 'Euplesiosauria belongs to Plesiosauroidea'
  • 'Eurycleidus belongs to Pliosauroidea'
  • 'Hauffiosaurus belongs to Pliosauridae'
  • 'Hauffiosaurus zanoni belongs to Hauffiosaurus'
  • 'Kimmerosaurus belongs to Cimoliasauridae'
  • 'Kimmerosaurus langhami belongs to Kimmerosaurus'
  • 'Kronosaurus belongs to Pliosauridae'
  • 'Kronosaurus queenslandicus belongs to Kronosaurus'
  • 'Leptocleidus belongs to Rhomaleosauridae'
  • 'Libonectes belongs to Elasmosauridae'
  • 'Liopleurodon belongs to Pliosauridae'
  • 'Liopleurodon ferox belongs to Liopleurodon' according to Sauvage 1873
  • 'Liopleurodon ferox belongs to Liopleurodon'
  • 'Macroplata belongs to Pliosauridae'
  • 'Macroplata tenuiceps belongs to Macroplata'
  • 'Microcleidus belongs to Euplesiosauria'
  • 'Morturneria belongs to Cimoliasauridae'
  • 'Muraenosaurus belongs to Cryptoclididae'
  • 'Muraenosaurus (Cryptoclidus) was reranked as Cryptoclidus and belongs to Cryptoclididae'
  • 'Muraenosaurus leedsii belongs to Muraenosaurus'
  • 'Peloneustes belongs to Pliosauridae'
  • 'Pistosauria was reranked as a unranked clade and belongs to Sauropterygia'
  • 'Pistosauridae belongs to Pistosauria'
  • 'Pistosaurus belongs to Pistosauridae'
  • 'Pistosaurus grandaevus belongs to Pistosaurus' according to Meyer 1839
  • 'Pistosaurus longaevus belongs to Pistosaurus'
  • 'Placodontia belongs to Sauropterygia'
  • 'Plesiosauria belongs to Pistosauria'
  • 'Plesiosauroidea belongs to Plesiosauria'
  • 'Plesiosaurus belongs to Plesiosauroidea'
  • 'Plesiosaurus (Pleiosaurus) brachydeirus is recombined as Pliosaurus brachydeirus'
  • 'Plesiosaurus (Thaumatosaurus) victor is recombined as Thaumatosaurus victor' according to Fraas 1920
  • 'Plesiosaurus (Thaumatosaurus) victor is recombined as Rhomaleosaurus victor'
  • 'Plesiosaurus arcuatus is recombined as Eurycleidus arcuatus'
  • 'Plesiosaurus brachypterygius belongs to Plesiosaurus'
  • 'Plesiosaurus capensis is recombined as Leptocleidus capensis'
  • 'Plesiosaurus conybeari is recombined as Attenborosaurus conybeari'
  • 'Plesiosaurus cramptoni is recombined as Rhomaleosaurus cramptoni' according to Seeley 1874
  • 'Plesiosaurus cramptoni is recombined as Rhomaleosaurus cramptoni'
  • 'Plesiosaurus dolichodeirus belongs to Plesiosaurus' according to Conybeare 1824
  • 'Plesiosaurus dolichodeirus belongs to Plesiosaurus'
  • 'Plesiosaurus eurymerus is recombined as Cryptoclidus eurymerus'
  • 'Plesiosaurus guilelmiimperatoris belongs to Plesiosaurus'
  • 'Plesiosaurus hawkinsii is recombined as Thalassiodracon hawkinsi'
  • 'Plesiosaurus homalospondylus is recombined as Microcleidus homalospondylus'
  • 'Plesiosaurus longirostris belongs to Plesiosaurus' according to Blake 1876
  • 'Plesiosaurus longirostris is recombined as Macroplata longirostris'
  • 'Plesiosaurus megacephalus belongs to Plesiosaurus' according to Stutchbury 1846
  • 'Plesiosaurus megacephalus is recombined as Rhomaleosaurus megacephalus'
  • 'Plesiosaurus philarchus is recombined as Peloneustes philarchus'
  • 'Plesiosaurus zetlandicus is recombined as Rhomaleosaurus zetlandicus' according to Phillips 1854
  • 'Plesiosaurus zetlandicus is recombined as Rhomaleosaurus zetlandicus'
  • 'Pliosauridae belongs to Pliosauroidea'
  • 'Pliosauroidea belongs to Plesiosauria'
  • 'Polycotylidae belongs to Tricleidia'
  • 'Polycotylus belongs to Polycotylidae'
  • 'Polycotylus latipinnis belongs to Polycotylus'
  • 'Rhomaleosauridae belongs to Pliosauroidea'
  • 'Rhomaleosaurus belongs to Rhomaleosauridae'
  • 'Simolestes belongs to Rhomaleosauridae'
  • 'Simolestes vorax belongs to Simolestes' according to Andrews 1909
  • 'Simolestes vorax belongs to Simolestes'
  • 'Simosaurus gaillardoti belongs to Simosaurus'
  • 'Styxosaurus belongs to Elasmosauridae'
  • 'Thalassiodracon belongs to Plesiosauria'
  • 'Tricleidia belongs to Cryptocleidoidea'
  • 'Tricleidus belongs to Tricleidia'
  • 'Tricleidus seeleyi belongs to Tricleidus' according to Andrews 1909
  • 'Tricleidus seeleyi belongs to Tricleidus'
  • 'Trinacromerum belongs to Polycotylidae'
  • 'Trinacromerum bentonianum belongs to Trinacromerum' according to Cragin 1888
  • 'Trinacromerum bentonianum belongs to Trinacromerum'
  • 'Turneria seymouriensis is recombined as Morturneria seymourensis'