Opinions from B. F. Nopcsa 1923
- 'Acanthopholididae [misspelled as Acanthopholidae] belongs to Thyreophora'
- 'Anchisauridae belongs to Pachypodosauria'
- 'Ankylosaurinae belongs to Acanthopholidae'
- 'Anomodontia was reranked as a suborder and belongs to Chainosauria'
- 'Camptosaurinae belongs to Kalodontidae'
- 'Ceratopsidae belongs to Thyreophora'
- 'Ceratopsinae belongs to Ceratopsidae'
- 'Cetiosauridae belongs to Sauropoda'
- 'Chainosauria belongs to Theromorpha'
- 'Coeluridae belongs to Coelurosauria'
- 'Coelurosauria belongs to Saurischia'
- 'Compsognathidae belongs to Coelurosauria'
- 'Compsognathinae belongs to Compsognathidae'
- 'Deuterotetrapous triassicus belongs to Deuterotetrapous'
- 'Dinocephalia was reranked as a order and belongs to Theromorpha'
- 'Dinosauria was reranked as a superorder and belongs to Reptilia'
- 'Diplodocidae belongs to Sauropoda'
- 'Dromasauria belongs to Chainosauria'
- 'Dromasauridae belongs to Dromasauria'
- 'Geikiidae belongs to Anomodontia'
- 'Geikiinae belongs to Geikiidae'
- 'Hallopidae [misspelled as Halopodidae] belongs to Coelurosauria'
- 'Halopodinae belongs to Halopodidae'
- 'Hypsilophodontinae belongs to Kalodontidae'
- 'Iguanodontinae belongs to Kalodontidae'
- 'Kalodontidae was reranked as a family and belongs to Ornithopoda'
- 'Leptoceratopsinae belongs to Ceratopsidae'
- 'Megalosauri is corrected as Megalosauridae and belongs to Megalosauria'
- 'Megalosauria belongs to Saurischia'
- 'Monocloniinae belongs to Ceratopsidae'
- 'Morosauridae belongs to Sauropoda'
- 'Ophiacodontidae belongs to Ophiacodontia'
- 'Ornithomiminae belongs to Compsognathidae'
- 'Ornithopoda belongs to Orthopoda'
- 'Orthopoda was reranked as a order and belongs to Dinosauria'
- 'Pachypodosauria belongs to Saurischia'
- 'Pelycosauria belongs to Reptilia'
- 'Plateosauridae [misspelled as Plataeosauridae] belongs to Pachypodosauria'
- 'Podokeosaurinae belongs to Halopodidae'
- 'Poposauria belongs to Orthopoda'
- 'Poposauridae belongs to Poposauria'
- 'Procompsognathinae belongs to Compsognathidae'
- 'Protrachodontinae belongs to Trachodontidae'
- 'Saphaeosaurinae belongs to Sphenodontidae'
- 'Saurischia belongs to Dinosauria'
- 'Sauropoda belongs to Saurischia'
- 'Scelidosaurinae belongs to Stegosauridae'
- 'Spinosauridae belongs to Megalosauria'
- 'Stegosauridae belongs to Thyreophora'
- 'Stegosaurinae belongs to Stegosauridae'
- 'Struthiosaurinae belongs to Acanthopholidae'
- 'Tapinocephalidae belongs to Tapinocephaloidea'
- 'Tapinocephaloidea was reranked as a suborder and belongs to Dinocephalia'
- 'Teratosauridae belongs to Megalosauria'
- 'Thalattosauria was reranked as a suborder and belongs to Pelycosauria'
- 'Thalattosauridae belongs to Thalattosauria'
- 'Thecodontosauridae belongs to Pachypodosauria'
- 'Theriodontia belongs to Theromorpha'
- 'Therocephalia was reranked as a suborder and belongs to Theriodontia'
- 'Theromorpha was reranked as a superorder and belongs to Reptilia'
- 'Thyreophora belongs to Orthopoda'
- 'Trachodontidae belongs to Ornithopoda'
- 'Trachodontinae belongs to Trachodontidae'
- 'Tyrannosauridae belongs to Megalosauria'