Opinions from J. A. Efremov 1940
- 'Anthodon belongs to Pareiasauridae'
- 'Anthodon chlynoviensis belongs to Anthodon'
- 'Anthodon rossicus belongs to Anthodon'
- 'Benthosuchidae belongs to Neorhachitomi'
- 'Capitosaurus volgensis belongs to Capitosaurus' according to Hartmann-Weinberg and Kuzmin 1936
- 'Capitosaurus volgensis is recombined as Wetlugasaurus volgensis'
- 'Cliorhizodon belongs to Rhopalodontidae'
- 'Dicynodontidae belongs to Anomodontia'
- 'Endothiodontidae belongs to Anomodontia'
- 'Karpinskiosaurus belongs to Seymouridae'
- 'Kotlassia belongs to Seymouridae'
- 'Lyrocephalus acutirostris belongs to Lyrocephalus' according to Hartmann-Weinberg and Kuzmin 1936
- 'Lyrocephalus acutirostris is recombined as Thoosuchus acutirostris'
- 'Lystrosaurus belongs to Dicynodontidae'
- 'Lystrosaurus klimovi belongs to Lystrosaurus'
- 'Moschosauridae belongs to Tapinocephalia'
- 'Moschosaurus belongs to Moschosauridae'
- 'Myctosuchidae is a subjective synonym of Venjukoviidae'
- 'Myctosuchus is a subjective synonym of Venjukovia'
- 'Platyops belongs to Archegosauridae'
- 'Proelginia is a subjective synonym of Scutosaurus'
- 'Proelginia permiana is recombined as Scutosaurus permianus'
- 'Rhopalodontidae belongs to Titanosuchia'
- 'Scutosaurus belongs to Pareiasauridae'
- 'Thoosuchus belongs to Benthosuchidae'
- 'Titanophoneus belongs to Rhopalodontidae'
- 'Titanophoneus potens belongs to Titanophoneus'
- 'Titanosuchia was reranked as a suborder and belongs to Dinocephalia'
- 'Trematosuchus jakovlevi belongs to Trematosuchus' according to Riabinin 1927
- 'Trematosuchus jakovlevi is recombined as Thoosuchus yakovlevi'
- 'Venjukovia invisa belongs to Venjukovia'
- 'Venjukoviidae is corrected as Venyukoviidae and belongs to Tapinocephalia'
- 'Venyukovia prima [misspelled as Venjukovia prima] belongs to Venjukovia'
- 'Volgosuchus belongs to Benthosuchidae'
- 'Volgosuchus cornutus belongs to Volgosuchus'
- 'Zygosaurus belongs to Dissorophidae'