Opinions from R. M. Sullivan 1991
- 'Anguidae belongs to Anguimorpha'
- 'Autarchoglossa belongs to Scleroglossa'
- 'Batrachosauroididae belongs to Proteoidea'
- 'Habrosaurus belongs to Sirenidae'
- 'Habrosaurus dilatus belongs to Habrosaurus'
- 'Haplodontosaurus is a nomen dubium'
- 'Harpagosaurus excedens is a nomen dubium'
- 'Harpagosaurus silberlingii is recombined as Proxestops silberlingii'
- 'Lacertoidea belongs to Scincomorpha'
- 'Machaerosaurus belongs to Anguidae'
- 'Machaerosaurus torrejonensis belongs to Machaerosaurus'
- 'Melanosaurini belongs to Glyptosaurinae'
- 'Opisthotriton belongs to Batrachosauroididae'
- 'Opisthotriton gidleyi belongs to Opisthotriton'
- 'Opisthotriton kayi belongs to Opisthotriton'
- 'Palaeoxantusia belongs to Xantusiidae'
- 'Palaeoxantusia fera belongs to Palaeoxantusia'
- 'Proxestops jepseni is a subjective synonym of Proxestops silberlingii'
- 'Peltosaurus piger is recombined as Odaxosaurus piger'
- 'Proxestops belongs to Melanosaurini'
- 'Proxestops gastrodon belongs to Proxestops' according to Bartels 1988
- 'Proxestops gastrodon is a subjective synonym of Proxestops silberlingii'
- 'Proxestops jepsoni is a subjective synonym of Proxestops silberlingii'
- 'Scapherpeton belongs to Scapherpetonidae'
- 'Scapherpeton tectum belongs to Scapherpeton'
- 'Scapherpetonidae is corrected as Scapherpetontidae and belongs to Ambystomatoidea'
- 'Scincomorpha belongs to Autarchoglossa'
- 'Scleroglossa belongs to Squamata'
- 'Sirenidae belongs to Salamandroidea'
- 'Xantusiidae belongs to Lacertoidea'