Opinions from R. S. Lull 1904
- 'Allosaurus belongs to Megalosauria'
- 'Amblonyx giganteus is recombined as Eubrontes platypus'
- 'Amblypus belongs to Testudinata'
- 'Amblypus dextratus belongs to Amblypus'
- 'Anchisauripodidae belongs to Theropoda'
- 'Anchisauripus belongs to Anchisauripodidae'
- 'Anchisauripus hitchcocki belongs to Anchisauripus'
- 'Anchisaurus colurus belongs to Anchisaurus'
- 'Ancyropus belongs to Testudinata'
- 'Anomoepodidae belongs to Orthopoda'
- 'Anomoepus belongs to Anomoepodidae'
- 'Anomoepus cuneatus belongs to Anomoepus'
- 'Anomoepus intermedius belongs to Anomoepus'
- 'Anomoepus isodactylus belongs to Anomoepus'
- 'Anomoepus major is a subjective synonym of Fulicopus lyellianus'
- 'Anomoepus minimus belongs to Anomoepus'
- 'Anomoepus minor is a subjective synonym of Anomoepus scambus'
- 'Anomoepus scambus belongs to Anomoepus'
- 'Anticheiropus belongs to Reptilia'
- 'Anticheiropus hamatus belongs to Anticheiropus'
- 'Anticheiropus pilulatus belongs to Anticheiropus'
- 'Antipus belongs to Reptilia'
- 'Antipus bifidus belongs to Antipus'
- 'Antipus flexiloquus belongs to Antipus'
- 'Apatichnus belongs to Anomoepodidae'
- 'Apatichnus circumagens belongs to Apatichnus'
- 'Apatichnus crassus is recombined as Anomoepus crassus'
- 'Apatichnus curvatus is recombined as Anomoepus curvatus'
- 'Apatichnus holyokensis is a subjective synonym of Anomoepus intermedius'
- 'Arachichnus belongs to Reptilia'
- 'Arachichnus dehiscens belongs to Arachichnus'
- 'Argoides belongs to Dinosauria'
- 'Argozoum disparidigitatum is a subjective synonym of Argoides macrodactylotus'
- 'Argozoum paridigitatum is a subjective synonym of Argoides isodactyletus'
- 'Batrachopodidae belongs to Proterosauria'
- 'Batrachopus dispar belongs to Batrachopus'
- 'Brontozoum is a subjective synonym of Eubrontes'
- 'Brontozoum approximatum is recombined as Eubrontes approximatus'
- 'Brontozoum divaricatum is recombined as Eubrontes divaricatus'
- 'Brontozoum loxonyx is a subjective synonym of Anchisauripus tuberosus'
- 'Brontozoum tuberatum is recombined as Anchisauripus tuberatus'
- 'Brontozoum validum is a subjective synonym of Anchisauripus tuberosus'
- 'Chelonoides belongs to Testudinata'
- 'Chelonoides incedens belongs to Chelonoides'
- 'Comptichnus belongs to Reptilia'
- 'Comptichnus obesus belongs to Comptichnus'
- 'Corvipes belongs to Anomoepodidae'
- 'Corvipes lacertoideus belongs to Corvipes'
- 'Cunichnoides belongs to Reptilia'
- 'Cunichnoides marsupialoideus belongs to Cunichnoides'
- 'Dimodosaurus belongs to Megalosauria'
- 'Eubrontes belongs to Eubrontidae'
- 'Eubrontes dananus is recombined as Anchisauripus dananus'
- 'Eubrontidae belongs to Orthopoda'
- 'Eupalamopus belongs to Reptilia'
- 'Exocampe belongs to Reptilia'
- 'Exocampe arcta belongs to Exocampe'
- 'Exocampe minimus is corrected as Exocampe minima and belongs to Exocampe'
- 'Exocampe ornata belongs to Exocampe'
- 'Fulicopus belongs to Anomoepodidae'
- 'Gigadipus is corrected as Gigandipus and belongs to Gigandipodidae'
- 'Gigadipus caudatus is recombined as Gigandipus caudatus'
- 'Gigandipodidae belongs to Theropoda'
- 'Gigantitherium is a subjective synonym of Gigadipus'
- 'Grallator belongs to Grallatoridae'
- 'Grallator cuneatus belongs to Grallator'
- 'Grallator cursorius belongs to Grallator'
- 'Grallator formosus belongs to Grallator'
- 'Grallator tenuis belongs to Grallator'
- 'Grallatoridae belongs to Theropoda'
- 'Harpedactylus belongs to Dinosauria'
- 'Harpedactylus concameratus is recombined as Platypterna concamerata'
- 'Harpedactylus crassus belongs to Harpedactylus'
- 'Harpedactylus gracilior belongs to Harpedactylus'
- 'Harpedactylus gracilis is a subjective synonym of Harpedactylus tenuissimus'
- 'Harpedactylus rectus is recombined as Platypterna recta'
- 'Helcura belongs to Testudinata'
- 'Helcura anguinea belongs to Helcura'
- 'Helcura caudata is a subjective synonym of Helcura littoralis'
- 'Helcura littoralis belongs to Helcura'
- 'Helcura surgens belongs to Helcura'
- 'Hoplichnus belongs to Vertebrata'
- 'Hoplichnus equus belongs to Hoplichnus'
- 'Hoplichnus poledrus is a subjective synonym of Hoplichnus quadrupedans'
- 'Hoplichnus quadrupedans belongs to Hoplichnus'
- 'Hyphepus belongs to Gigandipodidae'
- 'Hyphepus fieldi belongs to Hyphepus'
- 'Isocampe belongs to Reptilia'
- 'Isocampe strata belongs to Isocampe'
- 'Lagunculapes belongs to Dinosauria'
- 'Lagunculapes latus belongs to Lagunculapes'
- 'Leptonyx lateralis is recombined as Stenonyx lateralis'
- 'Macropterna is a subjective synonym of Palamopus'
- 'Macropterna divaricans is recombined as Palamopus divaricans'
- 'Macropterna gracilipes is recombined as Palamopus gracilipes'
- 'Macropterna recta is a subjective synonym of Palamopus anomalus'
- 'Macropterna rhynchosauroidea is a subjective synonym of Palamopus rogersianus'
- 'Macropterna vulgaris is a subjective synonym of Palamopus rogersianus'
- 'Ornithichnites deanii is recombined as Platypterna deaniana'
- 'Ornithichnites giganteus is recombined as Eubrontes giganteus'
- 'Ornithichnites gracilis is recombined as Grallator gracilis'
- 'Ornithichnites ingens is recombined as Steropoides ingens'
- 'Argoides minimus is a subjective synonym of Argoides isodactyletus'
- 'Ornithichnites minusculus is recombined as Anchisauripus minusculus'
- 'Ornithichnites parallelus is recombined as Anchisauripus parallelus'
- 'Argoides robustus is a nomen oblitum'
- 'Ornithichnites tetradactylus is recombined as Sillimanius tetradactylus'
- 'Ornithichnites tuberosus is recombined as Anchisauripus tuberosus'
- 'Ornithoidichnites delicatulus is recombined as Platypterna delicatula'
- 'Ornithoidichnites elegans is recombined as Steropoides elegans' according to E. Hitchcock 1845
- 'Ornithoidichnites elegans is recombined as Steropoides elegans'
- 'Ornithoidichnites gracilior is recombined as Sillimanius gracilior'
- 'Ornithoidichnites gracillimus is recombined as Anomoepus gracillimus'
- 'Ornithoidichnites isodactylus is recombined as Argoides isodactyletus'
- 'Ornithoidichnites lyellii is recombined as Fulicopus lyellianus'
- 'Ornithoidichnites macrodactylus is recombined as Argoides macrodactylotus'
- 'Ornithoidichnites redfieldii is recombined as Argoides redfieldianus'
- 'Ornithoidichnites rogersi is recombined as Palamopus rogersianus'
- 'Ornithoidichnites tenuis is recombined as Platypterna tenuis'
- 'Ornithopus is a subjective synonym of Sillimanius'
- 'Ornithopus gallinaceus belongs to Ornithopus' according to E. Hitchcock 1845
- 'Ornithopus gallinaceus is a subjective synonym of Sillimanius tetradactylus'
- 'Ornithopus loripes is recombined as Steropoides loripes'
- 'Orthodactylus belongs to Reptilia'
- 'Orthodactylus floriferus belongs to Orthodactylus'
- 'Orthodactylus introvergens belongs to Orthodactylus'
- 'Orthodactylus linearis belongs to Orthodactylus'
- 'Orthopoda belongs to Dinosauria'
- 'Otozoidae belongs to Orthopoda'
- 'Otozoum belongs to Otozoidae'
- 'Otozoum caudatum belongs to Otozoum'
- 'Otozoum moodii belongs to Otozoum'
- 'Palamopus belongs to Reptilia'
- 'Palamopus is replaced by Eupalamopus'
- 'Palamopus anomalus belongs to Palamopus'
- 'Palamopus clarki is a subjective synonym of Eupalamopus dananus'
- 'Palamopus dananus is recombined as Eupalamopus dananus'
- 'Platypterna belongs to Dinosauria'
- 'Platypterna digitigrada belongs to Platypterna'
- 'Platypterna gracillima belongs to Platypterna'
- 'Platypterna varica is a subjective synonym of Platypterna concamerata'
- 'Plectropterna angusta is recombined as Tarsoplectrus angustus'
- 'Plectropterna elegans is recombined as Tarsoplectrus elegans'
- 'Plesiornis belongs to Dinosauria'
- 'Plesiornis aequalipes is a subjective synonym of Argoides isodactyletus'
- 'Plesiornis giganteus is a subjective synonym of Anchisauripus minusculus'
- 'Plesiornis mirabilis belongs to Plesiornis'
- 'Plesiornis pilulatus belongs to Plesiornis'
- 'Plesiornis quadrupes is a subjective synonym of Anomoepus intermedius'
- 'Polemarchus belongs to Dinosauria'
- 'Polemarchus gigas belongs to Polemarchus' according to E. Hitchcock 1845
- 'Polemarchus gigas belongs to Polemarchus'
- 'Predentata is a subjective synonym of Orthopoda'
- 'Proterosauria belongs to Diaptosauria'
- 'Sauroidichnites abnormis is recombined as Typopus abnormis'
- 'Sauroidichnites baileyi is recombined as Triaenopus baileyanus'
- 'Sauropus barrattii is a subjective synonym of Anomoepus intermedius'
- 'Triaenopus emmonsianus is a subjective synonym of Triaenopus baileyanus'
- 'Sauroidichnites heteroclitus is recombined as Ancyropus heteroclitus'
- 'Sauroidichnites jacksoni is recombined as Ancyropus jacksonianus' according to E. Hitchcock 1845
- 'Ancyropus jacksonianus is a subjective synonym of Sauroidichnites heteroclitus'
- 'Sauroidichnites tenuissimus is recombined as Harpedactylus tenuissimus' according to E. Hitchcock 1845
- 'Sauroidichnites tenuissimus is recombined as Harpedactylus tenuissimus'
- 'Selenichnus belongs to Grallatoridae'
- 'Selenichnus breviusculus belongs to Selenichnus'
- 'Selenichnus falcatus belongs to Selenichnus'
- 'Shepardia belongs to Reptilia'
- 'Shepardia palmipes belongs to Shepardia'
- 'Sillimanius belongs to Dinosauria'
- 'Sillimanius adamsanus is a subjective synonym of Steropoides ingens'
- 'Stenodactylus is replaced by Sustenodactylus'
- 'Stenodactylus curvatus is recombined as Sustenodactylus curvatus'
- 'Stenonyx belongs to Grallatoridae'
- 'Steropezoum is a subjective synonym of Steropoides'
- 'Steropoides belongs to Dinosauria'
- 'Steropoides infelix belongs to Steropoides'
- 'Sustenodactylus belongs to Reptilia'
- 'Tarsodactylus belongs to Dinosauria'
- 'Tarsodactylus caudatus belongs to Tarsodactylus'
- 'Tarsodactylus expansus belongs to Tarsodactylus' according to C. H. Hitchcock 1866
- 'Tarsodactylus expansus belongs to Tarsodactylus'
- 'Tarsoplectrus belongs to Dinosauria'
- 'Theropoda belongs to Dinosauria'
- 'Toxichnus belongs to Vertebrata'
- 'Toxichnus inaequalis belongs to Toxichnus'
- 'Triaenopus belongs to Reptilia'
- 'Triaenopus leptodactylus is a subjective synonym of Triaenopus baileyanus'
- 'Tridentipes is a subjective synonym of Steropoides'
- 'Tridentipes insignis is a subjective synonym of Steropoides loripes'
- 'Tridentipes uncus is recombined as Steropoides uncus'
- 'Trihamus belongs to Vertebrata'
- 'Trihamus elegans belongs to Trihamus'
- 'Trihamus magnus belongs to Trihamus'
- 'Typopus belongs to Tetrapoda'
- 'Typopus gracilis belongs to Typopus'
- 'Xiphopeza belongs to Dinosauria'
- 'Xiphopeza triplex belongs to Xiphopeza'