Opinions from C. W. Gilmore 1924
- 'Cheneosaurus belongs to Lambeosaurinae'
- 'Cheneosaurus tolmanensis belongs to Cheneosaurus'
- 'Corythosaurus belongs to Lambeosaurinae'
- 'Corythosaurus casuarius belongs to Corythosaurus'
- 'Corythosaurus excavatus belongs to Corythosaurus'
- 'Edmontosaurus belongs to Hadrosaurinae'
- 'Edmontosaurus regalis belongs to Edmontosaurus'
- 'Gryposaurus notabilis is recombined as Kritosaurus notabilis'
- 'Hadrosaurinae belongs to Hadrosauridae'
- 'Hypacrosaurus belongs to Lambeosaurinae'
- 'Hypacrosaurus altispinus belongs to Hypacrosaurus'
- 'Kritosaurus belongs to Hadrosaurinae'
- 'Kritosaurus incurvimanus belongs to Kritosaurus' according to W. A. Parks 1919
- 'Kritosaurus incurvimanus belongs to Kritosaurus'
- 'Kritosaurus navajovius belongs to Kritosaurus'
- 'Lambeosaurinae belongs to Hadrosauridae'
- 'Lambeosaurus belongs to Lambeosaurinae'
- 'Lambeosaurus lambei belongs to Lambeosaurus'
- 'Parasaurolophus belongs to Lambeosaurinae'
- 'Prosaurolophus belongs to Saurolophinae'
- 'Prosaurolophus maximus belongs to Prosaurolophus'
- 'Saurolophinae belongs to Hadrosauridae'
- 'Saurolophus belongs to Saurolophinae'
- 'Saurolophus osborni belongs to Saurolophus'
- 'Stephanosaurinae is a nomen vanum'
- 'Stephanosaurus is a subjective synonym of Kritosaurus'
- 'Stephanosaurus intermedius is recombined as Corythosaurus intermedius'
- 'Thespesius belongs to Hadrosaurinae'
- 'Thespesius edmontoni belongs to Thespesius'
- 'Trachodon (Pteropelyx) marginatus is recombined as Kritosaurus marginatus'