Opinions from T. H. Patton 1969
- 'Alticamelus is a subjective synonym of Aepycamelus'
- 'Australocamelus belongs to Camelidae'
- 'Australocamelus orarius belongs to Australocamelus'
- 'Blastomeryx vigoratus is a nomen dubium'
- 'Blastomeryx wellsi is recombined as Longirostromeryx wellsi'
- 'Dromomeryx angustidens is a subjective synonym of Prosynthetoceras texanus'
- 'Dromomeryx texanus is recombined as Prosynthetoceras texanus'
- 'Floridatragulus barbouri belongs to Floridatragulus'
- 'Floridatragulus hesperus belongs to Floridatragulus'
- 'Floridatragulus nanus belongs to Floridatragulus'
- 'Floridatragulus texanus belongs to Floridatragulus'
- 'Lambdoceras is a subjective synonym of Prosynthetoceras'
- 'Lambdoceras hessei is recombined as Prosynthetoceras hessei'
- 'Lambdoceras hessei belongs to Lambdoceras' according to Stirton 1967
- 'Longirostromeryx merriami is a subjective synonym of Longirostromeryx wellsi'
- 'Longirostromeryx novomexicanus is a nomen dubium'
- 'Megatylopus primaevus belongs to Megatylopus'
- 'Merycodus grandis is a subjective synonym of Prosynthetoceras texanus'
- 'Nothokemas hidalgensis belongs to Nothokemas'
- 'Nothotylopus belongs to Camelidae'
- 'Nothotylopus camptognathus belongs to Nothotylopus'
- 'Oxydactylus floridanus is recombined as Nothokemas floridanus'
- 'Paratylopus grandis is a subjective synonym of Nothokemas floridanus'
- 'Pliauchenia (Megatylopus) was reranked as Megatylopus and belongs to Camelidae'
- 'Pliauchenia (Megatylopus) gigas is recombined as Megatylopus gigas'
- 'Procamelus benedentatus is recombined as Oxydactylus benedentatus'
- 'Procamelus concerptus is a subjective synonym of Oxydactylus benedentatus'
- 'Protolabis francisi is a subjective synonym of Oxydactylus benedentatus'
- 'Protolabis notiochorinos belongs to Protolabis'
- 'Syndyoceras australis is a subjective synonym of Prosynthetoceras texanus'
- 'Synthetoceras (Prosynthetoceras) douglasi is a subjective synonym of Prosynthetoceras texanus'
- 'Synthetoceras rileyi is a subjective synonym of Prosynthetoceras texanus'