Opinions from H.-D. Sues and D. B. Norman 1990
- 'Atlascopcosaurus belongs to Hypsilophodontidae'
- 'Atlascopcosaurus loadsi belongs to Atlascopcosaurus'
- 'Camptosaurus valdensis is a nomen dubium'
- 'Dryosauridae belongs to Ornithopoda'
- 'Dryosaurus belongs to Dryosauridae'
- 'Dryosaurus canaliculatus is recombined as Valdosaurus canaliculatus'
- 'Dysalotosaurus is a subjective synonym of Dryosaurus'
- 'Dysalotosaurus lettowvorbecki is recombined as Dryosaurus lettowvorbecki'
- 'Fulgurotherium belongs to Hypsilophodontidae'
- 'Fulgurotherium australe belongs to Fulgurotherium'
- 'Hypsilophodon belongs to Hypsilophodontidae'
- 'Hypsilophodon foxii belongs to Hypsilophodon'
- 'Hypsilophodon wielandi is a nomen dubium'
- 'Hypsilophodontidae belongs to Ornithopoda'
- 'Kangnasaurus is a nomen dubium'
- 'Kangnasaurus coetzeei is a nomen dubium'
- 'Laosaurus is a nomen dubium'
- 'Laosaurus altus is recombined as Dryosaurus altus'
- 'Laosaurus celer is a nomen dubium'
- 'Laosaurus consors is a subjective synonym of Othnielia rex'
- 'Laosaurus gracilis is a subjective synonym of Othnielia rex'
- 'Laosaurus minimus is a nomen dubium'
- 'Leaellynasaura belongs to Hypsilophodontidae'
- 'Leaellynasaura amicagraphica belongs to Leaellynasaura'
- 'Nanosaurus is a nomen dubium'
- 'Nanosaurus agilis is a nomen dubium'
- 'Nanosaurus rex is recombined as Othnielia rex'
- 'Orodromeus belongs to Hypsilophodontidae'
- 'Orodromeus makelai belongs to Orodromeus'
- 'Othnielia belongs to Hypsilophodontidae'
- 'Parksosaurus belongs to Hypsilophodontidae'
- 'Phyllodon is a nomen dubium'
- 'Phyllodon henkeli is a nomen dubium'
- 'Tenontosaurus belongs to Ornithopoda'
- 'Tenontosaurus tilletti belongs to Tenontosaurus'
- 'Thescelosaurus belongs to Hypsilophodontidae'
- 'Thescelosaurus edmontonensis is a subjective synonym of Thescelosaurus neglectus'
- 'Thescelosaurus garbanii belongs to Thescelosaurus'
- 'Thescelosaurus neglectus belongs to Thescelosaurus'
- 'Thescelosaurus warreni is recombined as Parksosaurus warreni'
- 'Valdosaurus belongs to Dryosauridae'
- 'Valdosaurus nigeriensis belongs to Valdosaurus'
- 'Yandusaurus belongs to Hypsilophodontidae'
- 'Yandusaurus hongheensis [misspelled as Yandusaurus honheensis] belongs to Yandusaurus'
- 'Yandusaurus multidens is a subjective synonym of Yandusaurus honheensis'
- 'Zephyrosaurus belongs to Hypsilophodontidae'
- 'Zephyrosaurus schaffi belongs to Zephyrosaurus'