Opinions from M. R. Cooper 1985
- 'Acanthopholididae [misspelled as Acanthopholidae] belongs to Ankylosauroidea'
- 'Ankylosauroidea belongs to Stegosauromorpha'
- 'Camptosauridae belongs to Camptosauroidea'
- 'Camptosauroidea belongs to Iguanodontia'
- 'Carnosauriformes belongs to Dinosauria'
- 'Ceratopsia was reranked as a infraorder and belongs to Neornithopoda'
- 'Ceratopsidae belongs to Ceratopsoidea'
- 'Ceratopsoidea belongs to Ceratopsia'
- 'Dryosaurinae belongs to Hypsilophodontidae'
- 'Dryosaurus belongs to Dryosaurinae'
- 'Dysalotosaurus is a subjective synonym of Dryosaurus'
- 'Dysalotosaurus lettowvorbecki is recombined as Dryosaurus lettowvorbecki'
- 'Fabrosauria belongs to Ornithopoda'
- 'Fabrosauridae is a subjective synonym of Nanosauridae'
- 'Fabrosauroidea belongs to Fabrosauria'
- 'Hadrosauridae belongs to Iguanodontoidea'
- 'Heterodontosauria belongs to Neornithopoda'
- 'Heterodontosauridae belongs to Heterodontosauria'
- 'Hypsilophodon belongs to Hypsilophodontidae'
- 'Hypsilophodontia belongs to Ornithopoda'
- 'Hypsilophodontidae belongs to Hypsilophodontoidea'
- 'Hypsilophodontoidea belongs to Hypsilophodontia'
- 'Iguanodontia belongs to Hypsilophodontia'
- 'Iguanodontidae belongs to Iguanodontoidea'
- 'Iguanodontoidea belongs to Iguanodontia'
- 'Kangnasaurus belongs to Dryosaurinae'
- 'Kangnasaurus coetzeei belongs to Kangnasaurus'
- 'Muttaburrasaurus belongs to Camptosauridae'
- 'Nanosauridae belongs to Fabrosauroidea'
- 'Nanosaurus belongs to Nanosauridae'
- 'Neornithischia belongs to Ornithischia'
- 'Neornithopoda was reranked as a suborder and belongs to Neornithischia'
- 'Nodosauridae belongs to Ankylosauroidea'
- 'Ornithischia was reranked as a superorder and belongs to Ornithischiformes'
- 'Ornithischiformes belongs to Dinosauria'
- 'Ornithopoda was reranked as a order and belongs to Ornithischia'
- 'Othnielia belongs to Hypsilophodontidae'
- 'Pachycephalosauria was reranked as a infraorder and belongs to Neornithopoda'
- 'Pachycephalosauridae belongs to Pachycephalosauria'
- 'Pachypodosauria was reranked as a superorder and belongs to Ornithischiformes'
- 'Pisanosauridae belongs to Heterodontosauria'
- 'Probactrosaurus belongs to Iguanodontidae'
- 'Protoceratopsidae belongs to Ceratopsoidea'
- 'Psittacosauridae belongs to Psittacosauroidea'
- 'Psittacosauroidea belongs to Ceratopsia'
- 'Scelidosauria was reranked as a infraorder and belongs to Thyreophorina'
- 'Scelidosauridae belongs to Scelidosauria'
- 'Stegosauroidea belongs to Stegosauromorpha'
- 'Stegosauromorpha belongs to Thyreophorina'
- 'Stenopelyxidae is corrected as Stenopelixidae and belongs to Pachycephalosauria'
- 'Thescelosaurus belongs to Hypsilophodontidae'
- 'Thyreophora [misspelled as Thyreophorina] belongs to Neornithischia'
- 'Valdosaurus belongs to Dryosaurinae'