Opinions from R. J. Butler et al. 2008
- 'Abrictosaurus belongs to Heterodontosauridae'
- 'Agilisaurus belongs to Neornithischia'
- 'Agilisaurus louderbacki belongs to Agilisaurus'
- 'Anabisetia belongs to Ornithopoda'
- 'Anabisetia saldiviai [misspelled as Anasibetia saldiviai] belongs to Anabisetia'
- 'Ankylopollexia belongs to Iguanodontia'
- 'Ankylosauria was reranked as a unranked clade and belongs to Thyreophora'
- 'Ankylosaurus magniventris belongs to Ankylosaurus'
- 'Archaeoceratops belongs to Neoceratopsia'
- 'Archaeoceratops oshimai belongs to Archaeoceratops'
- 'Bugenasaura belongs to Ornithopoda'
- 'Bugenasaura infernalis belongs to Bugenasaura'
- 'Camptonotus dispar is recombined as Camptosaurus dispar'
- 'Camptosauridae belongs to Ankylopollexia'
- 'Camptosaurus belongs to Camptosauridae'
- 'Cerapoda belongs to Neornithischia'
- 'Ceratops horridus is recombined as Triceratops horridus'
- 'Ceratopsia was reranked as a unranked clade and belongs to Marginocephalia'
- 'Ceratopsoidea belongs to Coronosauria'
- 'Chaoyangsaurus belongs to Ceratopsia'
- 'Chaoyangsaurus youngi belongs to Chaoyangsaurus'
- 'Coronosauria belongs to Neoceratopsia'
- 'Dryosauridae belongs to Iguanodontia'
- 'Dryosaurus belongs to Dryosauridae'
- 'Dryosaurus canaliculatus is recombined as Valdosaurus canaliculatus'
- 'Dysalotosaurus lettowvorbecki is recombined as Dryosaurus lettowvorbecki'
- 'Echinodon becklesii belongs to Echinodon'
- 'Emausaurus belongs to Thyreophora'
- 'Emausaurus ernsti belongs to Emausaurus'
- 'Gasparinisaura belongs to Ornithopoda'
- 'Gasparinisaura cincosaltensis belongs to Gasparinisaura'
- 'Genasauria belongs to Ornithischia'
- 'Goyocephale belongs to Pachycephalosauria'
- 'Goyocephale lattimorei belongs to Goyocephale'
- 'Herrerasaurus ischigualastensis belongs to Herrerasaurus'
- 'Heterodontosauridae belongs to Ornithischia'
- 'Heterodontosaurus belongs to Heterodontosauridae'
- 'Heterodontosaurus tucki belongs to Heterodontosaurus'
- 'Hexinlusaurus belongs to Neornithischia'
- 'Homalocephale belongs to Pachycephalosauria'
- 'Homalocephale calathocercos belongs to Homalocephale'
- 'Hongshanosaurus belongs to Psittacosauridae'
- 'Huayangosaurus taibaii belongs to Huayangosaurus'
- 'Hypsilophodon belongs to Ornithopoda'
- 'Hypsilophodon foxii belongs to Hypsilophodon'
- 'Iguanodontia was reranked as a unranked clade and belongs to Ornithopoda'
- 'Jeholosaurus belongs to Ornithopoda'
- 'Jeholosaurus shangyuanensis belongs to Jeholosaurus'
- 'Lanasaurus is a subjective synonym of Lycorhinus'
- 'Lanasaurus scalpridens is a subjective synonym of Lycorhinus angustidens'
- 'Laosaurus altus is recombined as Dryosaurus altus'
- 'Leptoceratops gracilis belongs to Leptoceratops'
- 'Leptoceratopsinae was reranked as the family Leptoceratopsidae and belongs to Neoceratopsia'
- 'Lesothosaurus belongs to Thyreophora'
- 'Lesothosaurus diagnosticus belongs to Lesothosaurus'
- 'Liaoceratops belongs to Neoceratopsia'
- 'Liaoceratops yanzigouensis belongs to Liaoceratops'
- 'Lycorhinus belongs to Heterodontosauridae'
- 'Lycorhinus angustidens belongs to Lycorhinus'
- 'Lycorhinus consors is recombined as Abrictosaurus consors'
- 'Marginocephalia belongs to Cerapoda'
- 'Micropachycephalosaurus belongs to Ceratopsia'
- 'Micropachycephalosaurus hongtuyanensis belongs to Micropachycephalosaurus'
- 'Mochlodon robustum is recombined as Zalmoxes robustus'
- 'Nanosaurus rex is recombined as Othnielia rex'
- 'Neoceratopsia belongs to Ceratopsia'
- 'Neornithischia was reranked as a unranked clade and belongs to Genasauria'
- 'Omosaurus armatus is recombined as Dacentrurus armatus'
- 'Ornithopoda was reranked as a unranked clade and belongs to Cerapoda'
- 'Orodromeus belongs to Ornithopoda'
- 'Orodromeus makelai belongs to Orodromeus'
- 'Othnielia belongs to Neornithischia'
- 'Pachycephalosauria was reranked as a unranked clade and belongs to Marginocephalia'
- 'Pachycephalosauridae belongs to Pachycephalosauria'
- 'Pachycephalosaurus belongs to Pachycephalosauridae'
- 'Parasaurolophus walkeri belongs to Parasaurolophus'
- 'Parksosaurus belongs to Ornithopoda'
- 'Pisanosaurus belongs to Ornithischia'
- 'Pisanosaurus mertii belongs to Pisanosaurus'
- 'Prenocephale belongs to Pachycephalosauridae'
- 'Protoceratops andrewsi belongs to Protoceratops'
- 'Protoceratopsidae belongs to Coronosauria'
- 'Psittacosauridae belongs to Ceratopsia'
- 'Psittacosaurus belongs to Psittacosauridae'
- 'Psittacosaurus mongoliensis belongs to Psittacosaurus'
- 'Rabdodon is corrected as Rhabdodon and belongs to Rhabdodontidae'
- 'Rabdodon priscum is recombined as Rhabdodon priscus'
- 'Rhabdodontidae belongs to Iguanodontia'
- 'Scelidosaurus belongs to Thyreophora'
- 'Scelidosaurus harrisonii belongs to Scelidosaurus'
- 'Scutellosaurus belongs to Thyreophora'
- 'Scutellosaurus lawleri belongs to Scutellosaurus'
- 'Silesaurus opolensis belongs to Silesaurus'
- 'Stegoceras belongs to Pachycephalosauridae'
- 'Stegosauria was reranked as a unranked clade and belongs to Thyreophora'
- 'Stegosaurus stenops belongs to Stegosaurus'
- 'Stenopelix belongs to Pachycephalosauria'
- 'Stenopelix valdensis belongs to Stenopelix'
- 'Stormbergia belongs to Neornithischia'
- 'Stormbergia dangershoeki belongs to Stormbergia'
- 'Styracosterna belongs to Ankylopollexia'
- 'Talenkauen santacrucensis belongs to Talenkauen'
- 'Tatisaurus oehleri is a nomen dubium'
- 'Tenontosaurus belongs to Iguanodontia'
- 'Tenontosaurus dossi belongs to Tenontosaurus'
- 'Tenontosaurus tilletti belongs to Tenontosaurus'
- 'Thescelosaurus belongs to Ornithopoda'
- 'Thescelosaurus edmontonensis is a subjective synonym of Thescelosaurus neglectus'
- 'Thescelosaurus neglectus belongs to Thescelosaurus'
- 'Thescelosaurus warreni is recombined as Parksosaurus warreni'
- 'Thyreophora was reranked as a unranked clade and belongs to Genasauria'
- 'Troodon wyomingensis is recombined as Pachycephalosaurus wyomingensis'
- 'Tylocephale belongs to Pachycephalosauridae'
- 'Valdosaurus belongs to Dryosauridae'
- 'Valdosaurus nigeriensis belongs to Valdosaurus'
- 'Wannanosaurus belongs to Pachycephalosauria'
- 'Wannanosaurus yansiensis belongs to Wannanosaurus'
- 'Xiaosaurus dashanpensis belongs to Xiaosaurus'
- 'Yandusaurus hongheensis belongs to Yandusaurus'
- 'Yandusaurus multidens is recombined as Hexinlusaurus multidens'
- 'Zalmoxes belongs to Rhabdodontidae'
- 'Zephyrosaurus schaffi belongs to Zephyrosaurus'