Opinions from E. L. Troxell 1921

  • 'Aepinacodon belongs to Anthracotheriidae'
  • 'Ancodus is a subjective synonym of Bothriodon'
  • 'Ancodus rostratus is recombined as Aepinacodon rostratus'
  • 'Ancodus rostratus is recombined as Hyopotamus rostratus' according to O'Harra 1920
  • 'Ancodus rostratus is recombined as Ancodon rostratus' according to Cook 1912
  • 'Ancodus rostratus belongs to Ancodus' according to Scott 1894
  • 'Anthracotherium karense is recombined as Octacodon karense'
  • 'Gymnoptychus is a subjective synonym of Ischyromys'
  • 'Gymnoptychus chrysodon is a subjective synonym of Ischyromys typus'
  • 'Heptacodon belongs to Anthracotheriidae'
  • 'Heptacodon is a subjective synonym of Anthracotherium' according to Cook 1912
  • 'Heptacodon is a subjective synonym of Anthracotherium' according to Hay 1902
  • 'Heptacodon is a subjective synonym of Anthracotherium' according to Matthew 1901
  • 'Heptacodon is a subjective synonym of Anthracotherium' according to Matthew 1899
  • 'Heptacodon armatus is recombined as Elomeryx armatus'
  • 'Heptacodon armatus is recombined as Anthracotherium armatum' according to Matthew 1899
  • 'Heptacodon curtus belongs to Heptacodon'
  • 'Heptacodon curtus is recombined as Anthracotherium curtum' according to Cook 1912
  • 'Heptacodon curtus is recombined as Anthracotherium curtum' according to Matthew 1901
  • 'Heptacodon curtus is recombined as Anthracotherium curtum' according to Matthew 1899
  • 'Heptacodon gibbiceps is recombined as Anthracotherium gibbiceps' according to Matthew 1899
  • 'Heptacodon gibbiceps is recombined as Octacodon gibbiceps'
  • 'Hyopotamus is a subjective synonym of Bothriodon'
  • 'Hyopotamus belongs to ' according to Owen 1848
  • 'Hyopotamus americanus is recombined as Aepinacodon americanus'
  • 'Hyopotamus brachyrhynchus is recombined as Elomeryx brachyrhynchus'
  • 'Hyopotamus brachyrhynchus is recombined as Bothriodon brachyrhynchus' according to Scott 1937
  • 'Hyopotamus deflectus is recombined as Aepinacodon deflectus'
  • 'Hyopotamus deflectus belongs to Hyopotamus' according to Matthew 1899
  • 'Hyopotamus deflectus is a subjective synonym of Ancodon americanus' according to Scott 1894
  • 'Hyopotamus deflectus is recombined as Ancodon deflectus' according to Marsh 1894