Opinions from D. B. Norman and H.-D. Sues 2000
- 'Altirhinus belongs to Iguanodontidae'
- 'Altirhinus kurzanovi belongs to Altirhinus'
- 'Aralosaurus is a nomen dubium'
- 'Aralosaurus tuberiferus is a nomen dubium'
- 'Arstanosaurus is a nomen dubium'
- 'Arstanosaurus akkurganensis is a nomen dubium'
- 'Bactrosaurus prynadai is a nomen dubium'
- 'Barsboldia is a nomen dubium'
- 'Barsboldia sicinskii is a nomen dubium'
- 'Cionodon kysylkumense is a nomen dubium'
- 'Gilmoreosaurus arkhangelskyi is a nomen dubium'
- 'Gilmoreosaurus atavus is a nomen dubium'
- 'Hadrosauridae belongs to Iguanodontia'
- 'Hadrosaurinae belongs to Hadrosauridae'
- 'Iguanodon belongs to Iguanodontidae'
- 'Iguanodon bernissartensis belongs to Iguanodon'
- 'Iguanodon orientalis is a subjective synonym of Iguanodon bernissartensis'
- 'Iguanodontia belongs to Ornithopoda'
- 'Iguanodontidae belongs to Iguanodontia'
- 'Jaxartosaurus is a nomen dubium'
- 'Jaxartosaurus aralensis is a nomen dubium'
- 'Lambeosaurinae belongs to Hadrosauridae'
- 'Mandschurosaurus belongs to Hadrosauridae'
- 'Nipponosaurus is a nomen dubium'
- 'Nipponosaurus sachalinensis is a nomen dubium'
- 'Orthomerus weberi is a nomen dubium'
- 'Saurolophus belongs to Hadrosaurinae'
- 'Saurolophus angustirostris belongs to Saurolophus'
- 'Saurolophus krystofovici is a nomen dubium'
- 'Saurolophus osborni belongs to Saurolophus'
- 'Trachodon amurense is recombined as Mandschurosaurus amurensis'