Opinions from E. C. Galbreath 1953

  • 'Aceratherium megalodum is recombined as Aphelops megalodus'
  • 'Aceratherium profectum is recombined as Aphelops profectus'
  • 'Aciprion belongs to Iguanidae'
  • 'Ammodon potens is recombined as Archaeotherium potens'
  • 'Anchisodon is a subjective synonym of Subhyracodon'
  • 'Ankylodon progressus belongs to Ankylodon'
  • 'Apternodus iliffensis belongs to Apternodus'
  • 'Archaeotherium belongs to Entelodontidae'
  • 'Archaeotherium mortoni belongs to Archaeotherium'
  • 'Bathornis belongs to Bathornithidae'
  • 'Bunaelurus is a subjective synonym of Palaeogale'
  • 'Bunaelurus lagophagus is recombined as Palaeogale lagophaga'
  • 'Buteo belongs to Accipitridae'
  • 'Caenopus persistens is recombined as Diceratherium persistens'
  • 'Calamagras belongs to Boidae'
  • 'Canis gregarius is recombined as Pseudocynodictis gregarius'
  • 'Canis hartshornianus is recombined as Daphoenus hartshornianus'
  • 'Canis lippincottianus is recombined as Pseudocynodictis lippincottianus'
  • 'Canis lippincottianus is recombined as Pseudocynodictis lippincottianus' according to Schlosser 1902
  • 'Canis lippincottianus is recombined as Galecynus lippincottianus' according to Cope 1884
  • 'Canis temerarius is recombined as Tomarctus temerarius'
  • 'Canis vafer is recombined as Leptocyon vafer'
  • 'Cervus warreni is recombined as Merycodus warreni'
  • 'Cosoryx is a subjective synonym of Merycodus'
  • 'Cosoryx furcatus is recombined as Merycodus furcatus'
  • 'Cremastosaurus belongs to Sauria'
  • 'Cynodictis hylactor is a subjective synonym of Pseudocynodictis lippincottianus'
  • 'Cynodictis paterculus is recombined as Pseudocynodictis paterculus'
  • 'Cynodictis paterculus is recombined as Pseudocynodictis paterculus' according to Clark 1937
  • 'Cynodictis temnodon is recombined as Pseudocynodictis temnodon'
  • 'Cynodictis temnodon is recombined as Pseudocynodictis temnodon' according to Matthew 1918
  • 'Daptophilus squalidens is recombined as Dinictis squalidens'
  • 'Diacium belongs to Sauria'
  • 'Diacium unipedalis is recombined as Cremastosaurus unipedalis' according to E. D. Cope 1874
  • 'Diplolophus parvus is recombined as Proheteromys parvus'
  • 'Dipoides curtus is recombined as Monosaulax curtus'
  • 'Domnina compressa belongs to Domnina'
  • 'Drassonax belongs to Amphicyonidae'
  • 'Drassonax harpagops belongs to Drassonax'
  • 'Elotherium bathrodon is a subjective synonym of Archaeotherium ramosus'
  • 'Elotherium crassum is recombined as Archaeotherium crassum'
  • 'Elotherium ramosum is recombined as Archaeotherium ramosus'
  • 'Exostinus belongs to Iguanidae'
  • 'Exostinus serratus belongs to Exostinus'
  • 'Glyptosaurus belongs to Anguidae'
  • 'Gopherus belongs to Testudinidae'
  • 'Gymnoptychus minutus is recombined as Adjidaumo minutus'
  • 'Gymnoptychus trilophus is recombined as Paradjidaumo trilophus'
  • 'Heloderma belongs to Helodermatidae'
  • 'Herpetotherium is a subjective synonym of Peratherium'
  • 'Herpetotherium fuzax is recombined as Peratherium fugax'
  • 'Herpetotherium fuzax is recombined as Peratherium fugax' according to Cope 1884
  • 'Herpetotherium huntii is recombined as Peratherium huntii'
  • 'Herpetotherium huntii is recombined as Peratherium huntii' according to Cope 1884
  • 'Hipparion coloradense is recombined as Neohipparion coloradense'
  • 'Hippotherium paniense is recombined as Merychippus paniensis'
  • 'Hippotherium sphenodus is recombined as Merychippus sphenodus'
  • 'Hyaenodon horridus belongs to Hyaenodon'
  • 'Hypohippus osborni belongs to Hypohippus'
  • 'Hyporhina belongs to Hyporhinidae'
  • 'Hyracodon apertus is a subjective synonym of Hyracodon nebraskensis'
  • 'Hyracodon arcidens is a subjective synonym of Hyracodon nebraskensis'
  • 'Hyracodon leidyanus is a subjective synonym of Hyracodon nebraskensis'
  • 'Hyracodon quadriplicatus is a subjective synonym of Subhyracodon occidentalis'
  • 'Hyracodon selenidens is a subjective synonym of Hyracodon nebraskensis'
  • 'Ischyromys pliacus is a subjective synonym of Ischyromys typus'
  • 'Leidymys vetus is a subjective synonym of Eumys exiguus'
  • 'Leptauchenia calcarata is recombined as Hypertragulus calcaratus'
  • 'Leptauchenia minima is recombined as Hypisodus minimus'
  • 'Machairodus primaevus is recombined as Hoplophoneus primaevus'
  • 'Martes ogygia is recombined as Plionictis ogygia'
  • 'Mastodon merriami is recombined as Mammut merriami'
  • 'Mastodon merriami is recombined as Mammut merriami' according to Hay 1930
  • 'Mastodon merriami is recombined as Miomastodon merriami' according to Osborn 1942
  • 'Mastodon merriami is recombined as Miomastodon merriami' according to Osborn 1926
  • 'Mastodon proavus is recombined as Serridentinus proavus'
  • 'Mastodon proavus is recombined as Serridentinus proavus' according to Osborn 1936
  • 'Mastodon productus is recombined as Serridentinus productus'
  • 'Megaceratops is a subjective synonym of Megacerops'
  • 'Megaceratops acer is recombined as Megacerops acer'
  • 'Menotherium lemurinum is recombined as Stibarus lemurinus'
  • 'Merychippus eoplacidus belongs to Merychippus'
  • 'Merychyus medius is recombined as Ustatochoerus medius'
  • 'Merycochoerus magnus is a subjective synonym of Merycochoerus proprius'
  • 'Merycodus gemmifer is recombined as Blastomeryx gemmifer'
  • 'Merycodus osborni is recombined as Ramoceros osborni'
  • 'Merycoidodon belongs to Merycoidodontidae'
  • 'Merycoidodon culbertsonii belongs to Merycoidodon'
  • 'Miothen is a subjective synonym of Domnina'
  • 'Miothen crassigenis is a subjective synonym of Domnina gradata'
  • 'Moropus matthewi is recombined as Macrotherium matthewi'
  • 'Moropus matthewi is recombined as Macrotherium matthewi' according to Matthew 1929
  • 'Moropus matthewi belongs to Moropus' according to Holland and Peterson 1913
  • 'Mustela parviloba is recombined as Plionictis parviloba'
  • 'Mylagaulus paniensis is recombined as Mesogaulus paniensis'
  • 'Neurodromicus belongs to Crotalidae'
  • 'Merycoidodon periculorum is a subjective synonym of Merycoidodon culbertsonii'
  • 'Oreodon gracile is recombined as Merycoidodon gracilis'
  • 'Oreodon major is recombined as Eporeodon major'
  • 'Palaeocrex belongs to Rallidae'
  • 'Palaeocrex fax belongs to Palaeocrex' according to Wetmore 1927
  • 'Palaeogyps belongs to Cathartidae'
  • 'Palaeogyps prodromus belongs to Palaeogyps' according to Wetmore 1927
  • 'Palaeolagus turgidus is recombined as Megalagus turgidus'
  • 'Paramys relictus is recombined as Prosciurus relictus'
  • 'Pelonax is a subjective synonym of Archaeotherium'
  • 'Peltosaurus belongs to Anguidae'
  • 'Pelycomys belongs to Allomyidae'
  • 'Pelycomys placidus belongs to Pelycomys'
  • 'Pelycomys rugosus belongs to Pelycomys'
  • 'Phalacrocorax belongs to Phalacrocoracidae'
  • 'Phalacrocorax mediterraneus belongs to Phalacrocorax' according to Shufeldt 1915
  • 'Phasmagyps belongs to Cathartidae'
  • 'Phasmagyps patritus belongs to Phasmagyps' according to Wetmore 1927
  • 'Platyrhachis rhambastes belongs to Platyrhachis' according to E. D. Cope 1884
  • 'Plesiosminthus clivosus belongs to Plesiosminthus'
  • 'Procamelus angustidens is recombined as Protolabis angustidens'
  • 'Procamelus fissidens is recombined as Protolabis fissidens'
  • 'Procamelus heterodontus is recombined as Protolabis heterodontus'
  • 'Protohippus labrosus is a nomen dubium'
  • 'Protohippus proplacidus is recombined as Merychippus proplacidus'
  • 'Protomeryx campester belongs to Protomeryx'
  • 'Protomeryx cedrensis is a subjective synonym of Protomeryx campester'
  • 'Protosorex is a subjective synonym of Domnina'
  • 'Protosorex crassus is a subjective synonym of Domnina gradata'
  • 'Rhineura belongs to Amphisbaenidae'
  • 'Rhinoceros nebraskensis is recombined as Hyracodon nebraskensis'
  • 'Stylemys belongs to Emydidae'
  • 'Testudo belongs to Testudinidae'
  • 'Testudo cultrata is a nomen dubium' according to Williams 1950
  • 'Testudo laticuneus [misspelled as Gopherus laticunea] belongs to Gopherus' according to Williams 1950
  • 'Testudo pansa [misspelled as Gopherus pansa] belongs to Gopherus' according to Williams 1950
  • 'Testudo quadratus is a nomen dubium' according to Williams 1950
  • 'Trigonias cooki is a subjective synonym of Trigonias osborni'
  • 'Trigonias hypostylus is a subjective synonym of Trigonias osborni'
  • 'Trigonias precopei is a subjective synonym of Trigonias osborni'
  • 'Trigonias preoccidentalis is a subjective synonym of Trigonias osborni'
  • 'Trigonias taylori is a subjective synonym of Trigonias osborni'
  • 'Trigonias taylori is a subjective synonym of Trigonias osborni' according to Figgins 1934
  • 'Xestops belongs to Anguidae'