Opinions from E. C. Olson 1962
- 'Angelosaurus belongs to Caseidae'
- 'Angelosaurus dolani belongs to Angelosaurus'
- 'Angelosaurus greeni belongs to Angelosaurus'
- 'Anomodontia was reranked as a suborder and belongs to Therapsida'
- 'Brithopodidae belongs to Eodeinocephalia'
- 'Captorhinidae belongs to Captorhinomorpha'
- 'Captorhinomorpha was reranked as a order and belongs to Eureptilia'
- 'Caseidae belongs to Pelycosauria'
- 'Caseoides belongs to Caseidae'
- 'Caseoides sanangeloensis belongs to Caseoides'
- 'Caseopsis belongs to Caseidae'
- 'Caseopsis agilis belongs to Caseopsis'
- 'Cotylorhynchus belongs to Caseidae'
- 'Cotylorhynchus hancocki belongs to Cotylorhynchus'
- 'Dimacrodon belongs to Dimacrodontidae'
- 'Dimacrodon hottoni belongs to Dimacrodon'
- 'Dimacrodontidae belongs to Venjukovioidea'
- 'Dinocephalia [misspelled as Deinocephalia] belongs to Therapsida'
- 'Driveria belongs to Driveriidae'
- 'Driveria ponderosa belongs to Driveria'
- 'Driveriidae belongs to Eodeinocephalia'
- 'Eodeinocephalia belongs to Deinocephalia'
- 'Eosyodon belongs to Brithopodidae'
- 'Eosyodon hudsoni belongs to Eosyodon'
- 'Eotheriodonta belongs to Theriodonta'
- 'Eotitanosuchus belongs to Phthinosuchidae'
- 'Eotitanosuchus olsoni belongs to Eotitanosuchus' according to Tchudinov 1960
- 'Eotitanosuchus olsoni belongs to Eotitanosuchus'
- 'Eureptilia belongs to Reptilia'
- 'Gecatogomphius [misspelled as Hecatogomphius] belongs to Captorhinidae'
- 'Gecatogomphius kavejevi [misspelled as Hecatogomphius kavejevi] belongs to Gecatogomphius'
- 'Gorgodon belongs to Phthinosuchidae'
- 'Gorgodon minutus belongs to Gorgodon'
- 'Kahneria belongs to Captorhinidae'
- 'Kahneria seltina belongs to Kahneria'
- 'Knoxosaurus belongs to Phthinosuchidae'
- 'Knoxosaurus niteckii belongs to Knoxosaurus'
- 'Leptoropha belongs to Rhipeosauridae'
- 'Leptoropha novojilovi belongs to Leptoropha'
- 'Mastersonia belongs to Mastersoniidae'
- 'Mastersonia driverensis belongs to Mastersonia'
- 'Mastersoniidae belongs to Eodeinocephalia'
- 'Nycteroleter belongs to Nyctiphruretidae'
- 'Nycteroleter ineptus belongs to Nycteroleter'
- 'Nyctiboetus belongs to Nyctiphruretidae'
- 'Nyctiboetus liteus belongs to Nyctiboetus'
- 'Nyctiphruretidae belongs to Procolophonia'
- 'Nyctiphruretus belongs to Nyctiphruretidae'
- 'Nyctiphruretus acudens belongs to Nyctiphruretus'
- 'Parareptilia belongs to Reptilia'
- 'Pareiasauria belongs to Parareptilia'
- 'Pelycosauria belongs to Synapsida'
- 'Phthinosuchidae belongs to Eotheriodonta'
- 'Procolophonia was reranked as a order and belongs to Parareptilia'
- 'Rhipaeosauridae [misspelled as Rhipeosauridae] belongs to Pareiasauria'
- 'Rhipaeosaurus [misspelled as Rhipeosaurus] belongs to Rhipeosauridae'
- 'Rhipaeosaurus talonophorus belongs to Rhipaeosaurus'
- 'Rhipaeosaurus tricuspidens belongs to Rhipaeosaurus'
- 'Rothia belongs to Captorhinidae'
- 'Rothia multidonta belongs to Rothia'
- 'Steppesaurus belongs to Phthinosuchidae'
- 'Steppesaurus gurleyi belongs to Steppesaurus'
- 'Synapsida was reranked as a infraclass and belongs to Eureptilia'
- 'Tappenosauridae belongs to Eodeinocephalia'
- 'Tappenosaurus belongs to Tappenosauridae'
- 'Tappenosaurus magnus belongs to Tappenosaurus'
- 'Therapsida was reranked as a order and belongs to Synapsida'
- 'Theriodontia [misspelled as Theriodonta] belongs to Therapsida'
- 'Venyukovioidea [misspelled as Venjukovioidea] belongs to Anomodontia'