Opinions from E. Hitchcock 1848
- 'Aethyopus belongs to Struthionidae'
- 'Aethyopus minor belongs to Aethyopus'
- 'Ancyropus belongs to Chelonia'
- 'Anisopus belongs to Batrachia'
- 'Anomoepus belongs to Batrachia'
- 'Anomoepus scambus belongs to Anomoepus'
- 'Argozoum belongs to Grallatores'
- 'Argozoum disparidigitatum belongs to Argozoum'
- 'Argozoum paridigitatum belongs to Argozoum'
- 'Batrachopus gracilis is recombined as Anisopus gracilis'
- 'Brontozoum belongs to Struthionidae'
- 'Brontozoum loxonyx belongs to Brontozoum'
- 'Harpedactylus belongs to Lacertilia'
- 'Harpedactylus concameratus belongs to Harpedactylus'
- 'Harpedactylus gracilis belongs to Harpedactylus'
- 'Harpedactylus rectus belongs to Harpedactylus'
- 'Helcura belongs to Chelonia'
- 'Helcura littoralis belongs to Helcura'
- 'Hoplichnus belongs to Batrachia'
- 'Hoplichnus quadrupedans belongs to Hoplichnus'
- 'Macropterna belongs to Lacertilia'
- 'Macropterna divaricans belongs to Macropterna'
- 'Macropterna recta belongs to Macropterna'
- 'Macropterna rhynchosauroidea belongs to Macropterna'
- 'Ornithichnites cuneatus is a subjective synonym of Brontozoum sillimanium'
- 'Ornithichnites deanii is recombined as Platypterna deaniana'
- 'Ornithichnites diversus is a subjective synonym of Steropezoum elegans'
- 'Ornithichnites giganteus is recombined as Brontozoum giganteum'
- 'Ornithichnites ingens is recombined as Steropezoum ingens'
- 'Ornithichnites minimus is recombined as Argozoum minimum'
- 'Ornithichnites palmatus is a subjective synonym of Macropterna recta'
- 'Ornithichnites parallelus is recombined as Brontozoum parallelum'
- 'Ornithoidichnites tetradactylus is a subjective synonym of Ornithopus gallinaceus'
- 'Ornithoidichnites danae is a subjective synonym of Ornithopus adamsanus'
- 'Ornithoidichnites delicatulus is recombined as Platypterna delicatula'
- 'Ornithoidichnites elegans is recombined as Steropezoum elegans'
- 'Ornithoidichnites elegantior is recombined as Steropezoum elegantius'
- 'Ornithoidichnites expansus is recombined as Brontozoum expansum'
- 'Ornithoidichnites fulicoides is a subjective synonym of Aethyopus minor'
- 'Ornithoidichnites gracilior is recombined as Ornithopus gracilior'
- 'Ornithoidichnites gracillimus is recombined as Brontozoum gracillimum'
- 'Ornithoidichnites isodactylus is a subjective synonym of Argozoum paridigitatum'
- 'Ornithoidichnites lyellii is recombined as Aethyopus lyellianus'
- 'Ornithoidichnites macrodactylus is a subjective synonym of Argozoum disparidigitatum'
- 'Ornithoidichnites redfieldii is recombined as Argozoum redfieldianum'
- 'Sillimanius rogersianus is a subjective synonym of Macropterna rhynchosauroidea'
- 'Ornithoidichnites sillimani is recombined as Brontozoum sillimanium'
- 'Ornithoidichnites tenuis is recombined as Platypterna tenuis'
- 'Ornithopus belongs to Aves'
- 'Ornithopus adamsanus belongs to Ornithopus'
- 'Ornithopus gallinaceus belongs to Ornithopus'
- 'Ornithopus loripes belongs to Ornithopus'
- 'Ornithopus rectus belongs to Ornithopus'
- 'Otozoum belongs to Batrachia'
- 'Otozoum moodii belongs to Otozoum'
- 'Palamopus belongs to Batrachia'
- 'Palamopus dananus belongs to Palamopus'
- 'Platypterna belongs to Grallatores'
- 'Plectropus belongs to Struthionidae'
- 'Polemarchus belongs to Lacertilia'
- 'Polemarchus gigas belongs to Polemarchus'
- 'Sauroidichnites abnormis is recombined as Typopus abnormis'
- 'Sauroidichnites baileyi is recombined as Triaenopus baileyanus'
- 'Sauroidichnites barrattii is recombined as Anomoepus barrattii'
- 'Sauroidichnites deweyi is recombined as Anisopus deweyanus'
- 'Sauroidichnites emmonsii is recombined as Triaenopus emmonsianus'
- 'Sauroidichnites heteroclitus is recombined as Ancyropus heteroclitus'
- 'Sauroidichnites jacksoni is a subjective synonym of Ancyropus heteroclitus'
- 'Sauroidichnites longipes is recombined as Plectropus longipes'
- 'Sauroidichnites minitans is recombined as Plectropus minitans'
- 'Sauroidichnites tenuissimus is a subjective synonym of Harpedactylus gracilis'
- 'Steropezoum belongs to Grallatores'
- 'Triaenopus belongs to Lacertilia'
- 'Xiphopeza belongs to Lacertilia'
- 'Xiphopeza triplex belongs to Xiphopeza'