Opinions from R. B. J. Benson et al. 2012
- 'Archaeonectrus belongs to Rhomaleosauridae'
- 'Attenborosaurus belongs to Pliosauridae'
- 'Avalonnectes belongs to Rhomaleosauridae'
- 'Avalonnectes arturi belongs to Avalonnectes'
- 'Eoplesiosaurus belongs to Plesiosauroidea'
- 'Eoplesiosaurus antiquior belongs to Eoplesiosaurus'
- 'Eretmosaurus belongs to Microcleididae'
- 'Eurycleidus belongs to Rhomaleosauridae'
- 'Hauffiosaurus belongs to Pliosauridae'
- 'Macroplata belongs to Rhomaleosauridae'
- 'Meyerasaurus belongs to Rhomaleosauridae'
- 'Microcleididae belongs to Plesiosauroidea'
- 'Microcleidus belongs to Microcleididae'
- 'Neoplesiosauria belongs to Plesiosauria'
- 'Occitanosaurus is a subjective synonym of Microcleidus'
- 'Plesiopterys belongs to Plesiosauroidea'
- 'Plesiosauroidea belongs to Neoplesiosauria'
- 'Plesiosaurus belongs to Plesiosauroidea'
- 'Plesiosaurus (Thaumatosaurus) victor is recombined as Meyerasaurus victor'
- 'Plesiosaurus brachypterygius is recombined as Microcleidus brachypterygius'
- 'Plesiosaurus guilelmiimperatoris is recombined as Seeleyosaurus guilelmiimperatoris'
- 'Plesiosaurus homalospondylus is recombined as Microcleidus homalospondylus'
- 'Plesiosaurus rugosus is recombined as Eretmosaurus rugosus'
- 'Plesiosaurus tournemirensis is recombined as Microcleidus tournemirensis'
- 'Pliosauridae belongs to Neoplesiosauria'
- 'Rhomaleosauridae belongs to Plesiosauria'
- 'Rhomaleosaurus belongs to Rhomaleosauridae'
- 'Seeleyosaurus belongs to Microcleididae'
- 'Stratesaurus belongs to Rhomaleosauridae'
- 'Stratesaurus taylori belongs to Stratesaurus'
- 'Thalassiodracon belongs to Pliosauridae'
- 'Westphaliasaurus belongs to Microcleididae'