Opinions from D. B. Weishampel and J. R. Horner 1990
- 'Agathaumas milo is a subjective synonym of Edmontosaurus regalis'
- 'Aralosaurus belongs to Hadrosaurinae'
- 'Aralosaurus tuberiferus belongs to Aralosaurus'
- 'Arstanosaurus is a nomen dubium'
- 'Arstanosaurus akkurganensis is a nomen dubium'
- 'Bactrosaurus belongs to Lambeosaurinae'
- 'Bactrosaurus johnsoni belongs to Bactrosaurus'
- 'Bactrosaurus prynadai is a nomen dubium'
- 'Barsboldia belongs to Lambeosaurinae'
- 'Barsboldia sicinskii belongs to Barsboldia'
- 'Brachylophosaurus belongs to Hadrosaurinae'
- 'Brachylophosaurus canadensis belongs to Brachylophosaurus'
- 'Brachylophosaurus goodwini belongs to Brachylophosaurus'
- 'Cheneosaurus tolmanensis is a subjective synonym of Hypacrosaurus altispinus'
- 'Cionodon is a nomen dubium'
- 'Cionodon arctatus is a nomen dubium'
- 'Cionodon kysylkumense is a nomen dubium'
- 'Cionodon stenopsis is a nomen dubium'
- 'Claorhynchus is a nomen dubium'
- 'Claorhynchus trihedrus is a nomen dubium'
- 'Claosaurus belongs to Hadrosauridae'
- 'Claosaurus affinis is a nomen dubium'
- 'Claosaurus annectens is recombined as Edmontosaurus annectens'
- 'Corythosaurus belongs to Lambeosaurinae'
- 'Corythosaurus bicristatus is a subjective synonym of Corythosaurus casuarius'
- 'Corythosaurus brevicristatus is a subjective synonym of Corythosaurus casuarius'
- 'Corythosaurus casuarius belongs to Corythosaurus'
- 'Corythosaurus excavatus is a subjective synonym of Corythosaurus casuarius'
- 'Corythosaurus frontalis is a subjective synonym of Lambeosaurus lambei'
- 'Diclonius is a nomen dubium'
- 'Diclonius calamarius is a nomen dubium'
- 'Diclonius pentagonus is a nomen dubium'
- 'Diclonius perangulatus is a nomen dubium'
- 'Didanodon is a subjective synonym of Lambeosaurus'
- 'Dysganus encaustus is a nomen dubium'
- 'Edmontosaurus belongs to Hadrosaurinae'
- 'Edmontosaurus regalis belongs to Edmontosaurus'
- 'Gilmoreosaurus belongs to Hadrosauridae'
- 'Gryposaurus belongs to Hadrosaurinae'
- 'Gryposaurus notabilis belongs to Gryposaurus'
- 'Hadrosaurinae belongs to Hadrosauridae'
- 'Hadrosaurus belongs to Hadrosaurinae'
- 'Hadrosaurus agilis is recombined as Claosaurus agilis'
- 'Hadrosaurus breviceps is a nomen dubium'
- 'Hadrosaurus cavatus is a nomen dubium'
- 'Hadrosaurus foulkii belongs to Hadrosaurus'
- 'Hadrosaurus minor is a nomen dubium'
- 'Hadrosaurus paucidens is a nomen dubium'
- 'Hecatasaurus is a subjective synonym of Telmatosaurus'
- 'Hypacrosaurus belongs to Lambeosaurinae'
- 'Hypacrosaurus altispinus belongs to Hypacrosaurus'
- 'Hypsibema is a nomen dubium'
- 'Hypsibema crassicauda is a nomen dubium'
- 'Iguanodon hilli is a nomen dubium'
- 'Jaxartosaurus belongs to Lambeosaurinae'
- 'Jaxartosaurus aralensis belongs to Jaxartosaurus'
- 'Jaxartosaurus fuyunensis is a nomen dubium'
- 'Kritosaurus navajovius belongs to Kritosaurus'
- 'Lambeosaurinae belongs to Hadrosauridae'
- 'Lambeosaurus belongs to Lambeosaurinae'
- 'Lambeosaurus clavinitialis is a subjective synonym of Lambeosaurus lambei'
- 'Lambeosaurus lambei belongs to Lambeosaurus'
- 'Lambeosaurus laticaudus belongs to Lambeosaurus'
- 'Lambeosaurus magnicristatum is corrected as Lambeosaurus magnicristatus and belongs to Lambeosaurus'
- 'Limnosaurus is replaced by Telmatosaurus'
- 'Limnosaurus transsylvanicus is recombined as Telmatosaurus transsylvanicus'
- 'Lophorhothon belongs to Hadrosaurinae'
- 'Lophorhothon atopus belongs to Lophorhothon'
- 'Maiasaura belongs to Hadrosaurinae'
- 'Maiasaura peeblesorum belongs to Maiasaura'
- 'Mandschurosaurus is a nomen dubium'
- 'Mandschurosaurus laosensis is a nomen dubium'
- 'Mandschurosaurus mongoliensis is recombined as Gilmoreosaurus mongoliensis'
- 'Microhadrosaurus is a nomen dubium'
- 'Microhadrosaurus nanshiungensis is a nomen dubium'
- 'Neosaurus missouriensis is a nomen dubium'
- 'Nipponosaurus belongs to Lambeosaurinae'
- 'Nipponosaurus sachalinensis belongs to Nipponosaurus'
- 'Ornithotarsus is a subjective synonym of Hadrosaurus'
- 'Ornithotarsus immanis is a subjective synonym of Hadrosaurus foulkii'
- 'Orthomerus is a nomen dubium'
- 'Orthomerus dolloi is a nomen dubium'
- 'Orthomerus weberi is a nomen dubium'
- 'Parasaurolophus belongs to Lambeosaurinae'
- 'Parasaurolophus cyrtocristatus belongs to Parasaurolophus'
- 'Parasaurolophus tubicen belongs to Parasaurolophus'
- 'Parasaurolophus walkeri belongs to Parasaurolophus'
- 'Parrosaurus is a nomen dubium'
- 'Procheneosaurus convincens is a subjective synonym of Jaxartosaurus aralensis'
- 'Prosaurolophus belongs to Hadrosaurinae'
- 'Prosaurolophus maximus belongs to Prosaurolophus'
- 'Pteropelyx is a nomen dubium'
- 'Pteropelyx grallipes is a nomen dubium'
- 'Sanpasaurus is a nomen dubium'
- 'Sanpasaurus yaoi is a nomen dubium'
- 'Saurolophus belongs to Hadrosaurinae'
- 'Saurolophus angustirostris belongs to Saurolophus'
- 'Saurolophus kryschtofovici is a nomen dubium'
- 'Saurolophus osborni belongs to Saurolophus'
- 'Secernosaurus belongs to Hadrosauridae'
- 'Secernosaurus koerneri belongs to Secernosaurus'
- 'Shantungosaurus belongs to Hadrosaurinae'
- 'Shantungosaurus giganteus belongs to Shantungosaurus'
- 'Corythosaurus intermedius is a subjective synonym of Corythosaurus casuarius'
- 'Tanius belongs to Hadrosauridae'
- 'Tanius chingkankouensis is a subjective synonym of Tanius sinensis'
- 'Tanius laiyangensis is a subjective synonym of Tsintaosaurus spinorhinus'
- 'Tanius sinensis belongs to Tanius'
- 'Telmatosaurus belongs to Hadrosauridae'
- 'Tetragonosaurus cranibrevis is a subjective synonym of Corythosaurus casuarius'
- 'Tetragonosaurus erectofrons is a subjective synonym of Corythosaurus casuarius'
- 'Tetragonosaurus praeceps is a subjective synonym of Lambeosaurus lambei'
- 'Thespesius is a nomen dubium'
- 'Thespesius edmontonensis is a subjective synonym of Edmontosaurus annectens'
- 'Thespesius occidentalis is a nomen dubium'
- 'Thespesius saskatchewanensis is recombined as Edmontosaurus saskatchewanensis'
- 'Trachodon is a nomen dubium'
- 'Trachodon altidens is a nomen dubium'
- 'Trachodon marginatus is a nomen dubium'
- 'Trachodon selwyni is a nomen dubium'
- 'Trachodon amurense is a nomen dubium'
- 'Trachodon cantabrigiensis is a nomen dubium'
- 'Trachodon mirabilis is a nomen dubium'
- 'Tsintaosaurus belongs to Hadrosauridae'
- 'Tsintaosaurus spinorhinus belongs to Tsintaosaurus'