Opinions from L. B. Radinsky 1966

  • 'Allacerops belongs to Hyracodontidae'
  • 'Amynodontidae belongs to Rhinocerotoidea'
  • 'Ardynia belongs to Hyracodontidae'
  • 'Colodon belongs to Helaletinae'
  • 'Colonoceras is a subjective synonym of Hyrachyus'
  • 'Cooperia is replaced by Forstercooperia'
  • 'Dilophodon belongs to Helaletinae'
  • 'Eggysodon belongs to Hyracodontidae'
  • 'Eotrigonias belongs to Hyracodontidae'
  • 'Ephyrachyus is a subjective synonym of Hyrachyus'
  • 'Epiaceratherium belongs to Rhinocerotidae'
  • 'Forstercooperia belongs to Hyracodontidae'
  • 'Helaletes belongs to Helaletinae'
  • 'Helaletidae belongs to Rhinocerotoidea'
  • 'Helaletinae belongs to Helaletidae'
  • 'Heptodon belongs to Helaletinae'
  • 'Hyrachyidae was reranked as the subfamily Hyrachyinae and belongs to Helaletidae'
  • 'Hyrachyus belongs to Hyrachyinae'
  • 'Hyracodon belongs to Hyracodontidae'
  • 'Hyracodontidae belongs to Rhinocerotoidea'
  • 'Indricotherium belongs to Hyracodontidae'
  • 'Juxia belongs to Hyracodontidae'
  • 'Metahyrachyus is a subjective synonym of Hyrachyus'
  • 'Pappaceras belongs to Hyracodontidae'
  • 'Paraceratherium belongs to Hyracodontidae'
  • 'Praeaceratherium belongs to Hyracodontidae'
  • 'Prohyracodon belongs to Hyracodontidae'
  • 'Prothyracodon belongs to Hyracodontidae'
  • 'Rhinocerotidae belongs to Rhinocerotoidea'
  • 'Trigonias belongs to Rhinocerotidae'
  • 'Triplopus belongs to Hyracodontidae'
  • 'Urtinotherium belongs to Hyracodontidae'