Opinions from E. Hitchcock 1845
- 'Ancyropus belongs to Tetradactylidae'
- 'Argoides belongs to Tridactylidaee'
- 'Batrachopus belongs to Tridactylidaee'
- 'Batrachopus gracilis belongs to Batrachopus'
- 'Calopus belongs to Tridactylidaee'
- 'Eubrontes belongs to Struthionoidae'
- 'Eubrontes dananus belongs to Eubrontes'
- 'Fulicopus belongs to Pteropodidae'
- 'Fulicopus minor belongs to Fulicopus'
- 'Harpedactylus belongs to Tetradactylidae'
- 'Ornithichnites deanii is recombined as Platypterna deanianus'
- 'Ornithichnites giganteus is recombined as Eubrontes giganteus'
- 'Ornithichnites ingens is recombined as Steropoides ingens'
- 'Ornithichnites minimus is recombined as Argoides minimus'
- 'Ornithichnites robustus is recombined as Argoides robustus'
- 'Ornithichnites robustus is recombined as Argoides robustus'
- 'Ornithichnites tetradactylus is recombined as Sillimanius tetradactylus'
- 'Ornithichnites tuberosus is recombined as Eubrontes tuberosus'
- 'Ornithoidichnites danae is a subjective synonym of Sillimanius adamsanus'
- 'Ornithoidichnites delicatulus is recombined as Calopus delicatulus'
- 'Ornithoidichnites elegans is recombined as Steropoides elegans'
- 'Ornithoidichnites elegantior is recombined as Steropoides elegantior'
- 'Ornithoidichnites expansus is recombined as Eubrontes expansus'
- 'Ornithoidichnites fulicoides is a subjective synonym of Fulicopus minor'
- 'Ornithoidichnites gracilior is recombined as Sillimanius gracilior'
- 'Ornithoidichnites gracillimus is recombined as Eubrontes gracillimus'
- 'Ornithoidichnites isodactylus is recombined as Argoides isodactyletus'
- 'Ornithoidichnites lyellii is recombined as Fulicopus lyellianus'
- 'Ornithoidichnites macrodactylus is recombined as Platypterna macrodactylotus'
- 'Ornithoidichnites redfieldii is recombined as Argoides redfieldianus'
- 'Ornithoidichnites rogersi is recombined as Sillimanius rogersianus'
- 'Ornithoidichnites sillimani is a subjective synonym of Eubrontes dananus'
- 'Ornithoidichnites tenuis is recombined as Platypterna tenuis'
- 'Palamopus belongs to Tetradactylidae'
- 'Palamopus anomalus belongs to Palamopus'
- 'Platypterna belongs to Tridactylidaee'
- 'Plectropus belongs to Tetradactylidae'
- 'Polemarchus belongs to Tetradactylidae'
- 'Sauroidichnites abnormis is recombined as Typopus abnormis'
- 'Sauroidichnites baileyi is recombined as Triaenopus baileyanus'
- 'Sauroidichnites barrattii is recombined as Sauropus barrattii'
- 'Sauroidichnites deweyi is recombined as Batrachopus deweyanus'
- 'Sauroidichnites emmonsii is recombined as Triaenopus emmonsianus'
- 'Sauroidichnites heteroclitus is recombined as Ancyropus heteroclitus'
- 'Sauroidichnites jacksoni is recombined as Ancyropus jacksonianus'
- 'Sauroidichnites longipes is recombined as Plectropus longipes'
- 'Sauroidichnites minitans is recombined as Plectropus minitans'
- 'Sauroidichnites palmatus belongs to Sauroidichnites' according to Hitchcock 1836
- 'Sauroidichnites palmatus is a subjective synonym of Palamopus anomalus'
- 'Sauroidichnites polemarchus is a subjective synonym of Polemarchus gigas'
- 'Sauroidichnites tenuissimus is recombined as Harpedactylus tenuissimus'
- 'Sauropus belongs to Pentedactylidae'
- 'Sillimanius belongs to Tetradactylidae'
- 'Sillimanius adamsanus belongs to Sillimanius'
- 'Steropoides belongs to Tridactylidaee'
- 'Triaenopus belongs to Tetradactylidae'
- 'Typopus belongs to Tridactylidaee'