Opinions from C. H. Hitchcock 1898
- 'Acanthichnus belongs to Hexapoda'
- 'Amblonyx belongs to Aves'
- 'Amblonyx giganteus belongs to Amblonyx'
- 'Amphisaurus is replaced by Anchisaurus'
- 'Anisopus gracilior is recombined as Anisichnus gracilior'
- 'Anomoepus belongs to Dinosauria'
- 'Anomoepus cuneatus belongs to Anomoepus'
- 'Anomoepus intermedius belongs to Anomoepus'
- 'Anomoepus isodactylus belongs to Anomoepus'
- 'Anomoepus major belongs to Anomoepus'
- 'Anomoepus minimus belongs to Anomoepus'
- 'Anomoepus minor belongs to Anomoepus'
- 'Anticheiropus belongs to Dinosauria'
- 'Anticheiropus hamatus belongs to Anticheiropus'
- 'Anticheiropus pilulatus belongs to Anticheiropus'
- 'Antipus bifidus belongs to Antipus'
- 'Antipus flexiloquus belongs to Antipus'
- 'Apatichnus belongs to Dinosauria'
- 'Apatichnus bellus belongs to Apatichnus'
- 'Apatichnus circumagens belongs to Apatichnus'
- 'Apatichnus crassus belongs to Apatichnus'
- 'Apatichnus curvatus is recombined as Anomoepus curvatus'
- 'Apatichnus holyokensis belongs to Apatichnus'
- 'Arachichnus dehiscens belongs to Arachichnus'
- 'Argozoum belongs to Aves'
- 'Argozoum disparidigitatum belongs to Argozoum'
- 'Argozoum paridigitatum belongs to Argozoum'
- 'Batrachoides belongs to Batrachia'
- 'Batrachoides nidificans belongs to Batrachoides'
- 'Batrachopus gracilis is recombined as Anisichnus gracilis'
- 'Bifurculipes belongs to Hexapoda'
- 'Bisulcus belongs to Mollusca'
- 'Brontozoum belongs to Aves'
- 'Brontozoum approximatum belongs to Brontozoum'
- 'Brontozoum divaricatum belongs to Brontozoum'
- 'Brontozoum exsertum belongs to Brontozoum'
- 'Brontozoum tuberatum belongs to Brontozoum'
- 'Brontozoum validum belongs to Brontozoum'
- 'Cheirotheroides belongs to Batrachia'
- 'Cheirotheroides pilulatus belongs to Cheirotheroides'
- 'Chimaerichnus belongs to Dinosauria'
- 'Chimaerichnus ingens belongs to Chimaerichnus'
- 'Cochlichnus belongs to Mollusca'
- 'Comptichnus obesus belongs to Comptichnus'
- 'Conopsoides belongs to Hexapoda'
- 'Copeza belongs to Hexapoda'
- 'Corvipes belongs to Dinosauria'
- 'Corvipes lacertoideus belongs to Corvipes'
- 'Cunichnoides belongs to Marsupialia'
- 'Cunichnoides marsupialoideus belongs to Cunichnoides'
- 'Cunicularius belongs to Arthropoda'
- 'Exocampe belongs to Batrachia'
- 'Exocampe arcta belongs to Exocampe'
- 'Exocampe minimus is corrected as Exocampe minima and belongs to Exocampe'
- 'Exocampe ornata belongs to Exocampe'
- 'Gigadipus caudatus is recombined as Gigantitherium caudatum'
- 'Gigantitherium belongs to Dinosauria'
- 'Gigantitherium minus belongs to Gigantitherium'
- 'Grallator belongs to Aves'
- 'Grallator cuneatus belongs to Grallator'
- 'Grallator cursorius belongs to Grallator'
- 'Grallator formosus belongs to Grallator'
- 'Grallator tenuis belongs to Grallator'
- 'Grammepus belongs to Hexapoda'
- 'Hamipes belongs to Arthropoda'
- 'Harpedactylus crassus belongs to Harpedactylus'
- 'Harpedactylus gracilior belongs to Harpedactylus'
- 'Harpedactylus gracilis belongs to Harpedactylus'
- 'Harpedactylus rectus is recombined as Platypterna recta'
- 'Harpepus [misspelled as Harpipes] belongs to Hexapoda'
- 'Hexapodichnus belongs to Hexapoda'
- 'Hyphepus belongs to Dinosauria'
- 'Hyphepus fieldi belongs to Hyphepus'
- 'Isocampe strata belongs to Isocampe'
- 'Lagunculapes [misspelled as Lagunculipes] belongs to Batrachia'
- 'Lagunculapes latus [misspelled as Lagunculipes latus] belongs to Lagunculipes'
- 'Leptonyx belongs to Aves'
- 'Leptonyx lateralis belongs to Leptonyx'
- 'Macropterna belongs to Batrachia'
- 'Macropterna divaricans belongs to Macropterna'
- 'Macropterna gracilipes belongs to Macropterna'
- 'Macropterna vulgaris belongs to Macropterna'
- 'Megadactylus polyzelus belongs to Megadactylus'
- 'Ornithichnites deanii is recombined as Platypterna deaniana'
- 'Ornithichnites giganteus is recombined as Brontozoum giganteum'
- 'Ornithichnites gracilis is recombined as Grallator gracilis'
- 'Ornithichnites ingens is recombined as Tridentipes ingens'
- 'Ornithichnites minusculus is recombined as Brontozoum minusculum'
- 'Ornithichnites parallelus is recombined as Grallator parallelus'
- 'Ornithoidichnites delicatulus is recombined as Platypterna delicatula'
- 'Ornithoidichnites elegans is recombined as Tridentipes elegans'
- 'Ornithoidichnites elegantior is recombined as Tridentipes elegantior'
- 'Ornithoidichnites gracilior is recombined as Ornithopus gracilior'
- 'Ornithoidichnites gracillimus is recombined as Anomoepus gracillimus'
- 'Ornithoidichnites lyellii is recombined as Amblonyx lyellianus'
- 'Ornithoidichnites redfieldii is recombined as Argozoum redfieldianum'
- 'Ornithoidichnites sillimani is recombined as Brontozoum sillimanium'
- 'Ornithoidichnites tenuis is recombined as Platypterna tenuis'
- 'Ornithopus belongs to Dinosauria'
- 'Ornithopus gallinaceus belongs to Ornithopus'
- 'Orthodactylus floriferus belongs to Orthodactylus'
- 'Orthodactylus introvergens belongs to Orthodactylus'
- 'Orthodactylus linearis belongs to Orthodactylus'
- 'Otozoum belongs to Batrachia'
- 'Otozoum caudatum belongs to Otozoum'
- 'Otozoum moodii belongs to Otozoum'
- 'Otozoum parvum belongs to Otozoum'
- 'Palamopus belongs to Batrachia'
- 'Palamopus clarki belongs to Palamopus'
- 'Platypterna belongs to Dinosauria'
- 'Platypterna digitigrada belongs to Platypterna'
- 'Platypterna varica belongs to Platypterna'
- 'Plectropterna angusta belongs to Plectropterna'
- 'Plectropterna gracilis belongs to Plectropterna'
- 'Plectropterna lineans belongs to Plectropterna'
- 'Plesiornis belongs to Dinosauria'
- 'Plesiornis giganteus belongs to Plesiornis'
- 'Polemarchus gigas belongs to Polemarchus'
- 'Pterichnus belongs to Arthropoda'
- 'Sagittarius belongs to Hexapoda'
- 'Sauroidichnites abnormis is recombined as Typopus abnormis'
- 'Sauroidichnites barrattii is recombined as Chimaerichnus barrattii'
- 'Sauroidichnites deweyi is recombined as Anisichnus deweyanus'
- 'Sauroidichnites minitans is recombined as Plectropterna minitans'
- 'Selenichnus belongs to Batrachia'
- 'Selenichnus breviusculus belongs to Selenichnus'
- 'Selenichnus falcatus belongs to Selenichnus'
- 'Shepardia belongs to Batrachia'
- 'Shepardia palmipes belongs to Shepardia'
- 'Stenodactylus curvatus belongs to Stenodactylus'
- 'Tarsodactylus belongs to Dinosauria'
- 'Tarsodactylus caudatus belongs to Tarsodactylus'
- 'Tarsodactylus expansus belongs to Tarsodactylus'
- 'Toxichnus inaequalis belongs to Toxichnus'
- 'Triaenopus leptodactylus belongs to Triaenopus'
- 'Tridentipes belongs to Dinosauria'
- 'Tridentipes insignis belongs to Tridentipes'
- 'Tridentipes uncus belongs to Tridentipes'
- 'Trihamus belongs to Dinosauria'
- 'Trihamus elegans belongs to Trihamus'
- 'Trihamus magnus belongs to Trihamus'
- 'Trisulcus belongs to Mollusca'
- 'Typopus gracilis belongs to Typopus'
- 'Unisulcus belongs to Arthropoda'
- 'Xiphopeza triplex belongs to Xiphopeza'