Opinions from P.-E. Dieudonné et al. 2020
- 'Abrictosaurus belongs to Heterodontosaurinae'
- 'Agilisaurus belongs to Genasauria'
- 'Agilisaurus louderbacki belongs to Agilisaurus'
- 'Anabisetia belongs to Elasmaria'
- 'Anabisetia saldiviai belongs to Anabisetia'
- 'Ankylopollexia belongs to Dryomorpha'
- 'Ankylosauria was reranked as a unranked clade and belongs to Thyreophora'
- 'Archaeoceratops oshimai belongs to Archaeoceratops'
- 'Callovosaurus belongs to Dryomorpha'
- 'Camptonotus dispar is recombined as Camptosaurus dispar'
- 'Camptosaurus belongs to Ankylopollexia'
- 'Camptosaurus aphanoecetes belongs to Camptosaurus'
- 'Camptosaurus leedsi is recombined as Callovosaurus leedsi'
- 'Cerapoda belongs to Genasauria'
- 'Ceratopsia was reranked as a unranked clade and belongs to Marginocephalia'
- 'Changchunsaurus belongs to Ornithopoda'
- 'Changchunsaurus parvus belongs to Changchunsaurus'
- 'Chaoyangsaurus youngi belongs to Chaoyangsaurus'
- 'Chilesaurus belongs to Ornithischia'
- 'Chilesaurus diegosuarezi belongs to Chilesaurus'
- 'Clypeodonta belongs to Ornithopoda'
- 'Convolosaurus belongs to Iguanodontia'
- 'Convolosaurus marri belongs to Convolosaurus'
- 'Dryomorpha belongs to Iguanodontia'
- 'Dryosauridae belongs to Dryomorpha'
- 'Dryosaurus belongs to Dryosauridae'
- 'Dryosaurus canaliculatus is recombined as Valdosaurus canaliculatus'
- 'Dysalotosaurus belongs to Dryosauridae'
- 'Dysalotosaurus lettowvorbecki belongs to Dysalotosaurus'
- 'Echinodon belongs to Pachycephalosauria'
- 'Echinodon becklesii belongs to Echinodon'
- 'Elasmaria belongs to Iguanodontia'
- 'Elrhazosaurus belongs to Dryosauridae'
- 'Emausaurus belongs to Thyreophora'
- 'Eocursor belongs to Genasauria'
- 'Eousdryosaurus belongs to Dryomorpha'
- 'Eousdryosaurus nanohallucis belongs to Eousdryosaurus'
- 'Eupachycephalosauria belongs to Pachycephalosauria'
- 'Fostoria belongs to Rhabdodontomorpha'
- 'Fostoria dhimbangunmal belongs to Fostoria'
- 'Fruitadens belongs to Heterodontosaurinae'
- 'Fruitadens haagarorum belongs to Fruitadens'
- 'Gasparinisaura belongs to Parksosauridae'
- 'Gasparinisaura cincosaltensis belongs to Gasparinisaura'
- 'Genasauria belongs to Ornithischia'
- 'Goyocephale belongs to Pachycephalosauria'
- 'Goyocephale lattimorei belongs to Goyocephale'
- 'Haya belongs to Ornithopoda'
- 'Haya griva belongs to Haya'
- 'Herrerasaurus ischigualastensis belongs to Herrerasaurus'
- 'Heterodontosaurinae belongs to Pachycephalosauria'
- 'Heterodontosaurus belongs to Heterodontosaurinae'
- 'Heterodontosaurus tucki belongs to Heterodontosaurus'
- 'Hexinlusaurus belongs to Genasauria'
- 'Homalocephale belongs to Eupachycephalosauria'
- 'Homalocephale calathocercos belongs to Homalocephale'
- 'Hypsilophodon belongs to Hypsilophodontidae'
- 'Hypsilophodontidae was reranked as a unranked clade and belongs to Clypeodonta'
- 'Iguanodon belongs to Ankylopollexia'
- 'Iguanodon bernissartensis belongs to Iguanodon'
- 'Iguanodontia was reranked as a unranked clade and belongs to Clypeodonta'
- 'Isaberrysaura belongs to Thyreophora'
- 'Isaberrysaura mollensis belongs to Isaberrysaura'
- 'Jeholosaurus belongs to Ornithopoda'
- 'Jeholosaurus shangyuanensis belongs to Jeholosaurus'
- 'Kangnasaurus belongs to Elasmaria'
- 'Kangnasaurus coetzeei belongs to Kangnasaurus'
- 'Koreanosaurus belongs to Orodrominae'
- 'Koreanosaurus boseongensis belongs to Koreanosaurus'
- 'Kulindadromeus belongs to Clypeodonta'
- 'Kulindadromeus zabaikalicus belongs to Kulindadromeus'
- 'Laosaurus altus is recombined as Dryosaurus altus'
- 'Laquintasaura belongs to Ornithischia'
- 'Laquintasaura venezuelae belongs to Laquintasaura'
- 'Lesothosaurus belongs to Ornithischia'
- 'Lesothosaurus diagnosticus belongs to Lesothosaurus'
- 'Liaoceratops yanzigouensis belongs to Liaoceratops'
- 'Lycorhinus belongs to Heterodontosaurinae'
- 'Lycorhinus angustidens belongs to Lycorhinus'
- 'Lycorhinus consors is recombined as Abrictosaurus consors'
- 'Macrogryphosaurus belongs to Elasmaria'
- 'Macrogryphosaurus gondwanicus belongs to Macrogryphosaurus'
- 'Mahuidacursor belongs to Elasmaria'
- 'Mahuidacursor lipanglef belongs to Mahuidacursor'
- 'Manidens condorensis belongs to Manidens'
- 'Marginocephalia belongs to Cerapoda'
- 'Mochlodon belongs to Rhabdodontidae'
- 'Mochlodon robustum is recombined as Zalmoxes robustus'
- 'Morrosaurus belongs to Elasmaria'
- 'Morrosaurus antarcticus belongs to Morrosaurus'
- 'Muttaburrasaurus belongs to Rhabdodontomorpha'
- 'Muttaburrasaurus langdoni belongs to Muttaburrasaurus'
- 'Nanosaurus belongs to Ornithopoda'
- 'Nanosaurus agilis belongs to Nanosaurus'
- 'Ornithopoda was reranked as a unranked clade and belongs to Cerapoda'
- 'Orodromeus belongs to Orodrominae'
- 'Orodromeus makelai belongs to Orodromeus'
- 'Orodrominae belongs to Ornithopoda'
- 'Pachycephalosauria was reranked as a unranked clade and belongs to Marginocephalia'
- 'Pachycephalosaurus belongs to Eupachycephalosauria'
- 'Parksosauridae belongs to Hypsilophodontidae'
- 'Parksosaurus belongs to Parksosauridae'
- 'Pisanosaurus mertii belongs to Pisanosaurus'
- 'Prenocephale belongs to Eupachycephalosauria'
- 'Prenocephale prenes belongs to Prenocephale'
- 'Protoceratops andrewsi belongs to Protoceratops'
- 'Psittacosaurus lujiatunensis belongs to Psittacosaurus'
- 'Psittacosaurus major belongs to Psittacosaurus'
- 'Psittacosaurus mongoliensis belongs to Psittacosaurus'
- 'Rabdodon is corrected as Rhabdodon and belongs to Rhabdodontidae'
- 'Rabdodon priscum is recombined as Rhabdodon priscus'
- 'Rhabdodontidae belongs to Rhabdodontomorpha'
- 'Rhabdodontomorpha belongs to Iguanodontia'
- 'Scelidosaurus belongs to Thyreophora'
- 'Scutellosaurus belongs to Thyreophora'
- 'Stegoceras belongs to Eupachycephalosauria'
- 'Stegoceras validus is corrected as Stegoceras validum and belongs to Stegoceras'
- 'Stegosauria was reranked as a unranked clade and belongs to Thyreophora'
- 'Stenopelix valdensis belongs to Stenopelix'
- 'Stormbergia dangershoeki is a subjective synonym of Lesothosaurus diagnosticus'
- 'Talenkauen belongs to Elasmaria'
- 'Talenkauen santacrucensis belongs to Talenkauen'
- 'Tenontosaurus belongs to Iguanodontia'
- 'Tenontosaurus dossi belongs to Tenontosaurus'
- 'Tenontosaurus tilletti belongs to Tenontosaurus'
- 'Thescelosaurus belongs to Clypeodonta'
- 'Thescelosaurus assiniboiensis belongs to Thescelosaurus'
- 'Thescelosaurus neglectus belongs to Thescelosaurus'
- 'Thescelosaurus warreni is recombined as Parksosaurus warreni'
- 'Thyreophora was reranked as a unranked clade and belongs to Genasauria'
- 'Tianyulong belongs to Pachycephalosauria'
- 'Tianyulong confuciusi belongs to Tianyulong'
- 'Troodon wyomingensis is recombined as Pachycephalosaurus wyomingensis'
- 'Valdosaurus belongs to Dryosauridae'
- 'Valdosaurus nigeriensis is recombined as Elrhazosaurus nigeriensis'
- 'Wannanosaurus belongs to Pachycephalosauria'
- 'Wannanosaurus yansiensis belongs to Wannanosaurus'
- 'Yandusaurus hongheensis belongs to Yandusaurus'
- 'Yinlong downsi belongs to Yinlong'
- 'Yueosaurus belongs to Iguanodontia'
- 'Yueosaurus tiantaiensis belongs to Yueosaurus'
- 'Zalmoxes belongs to Rhabdodontidae'
- 'Zalmoxes shqiperorum belongs to Zalmoxes'
- 'Zephyrosaurus belongs to Orodrominae'
- 'Zephyrosaurus schaffi belongs to Zephyrosaurus'