Opinions from G. J. Heal 1973

  • 'Anomotherium belongs to Halitheriinae'
  • 'Archaeosiren is a subjective synonym of Eotheroides'
  • 'Caribosiren belongs to Metaxytheriinae'
  • 'Dugong belongs to Dugonginae'
  • 'Dugongidae belongs to Dugongoidea'
  • 'Dugongoidea belongs to Sirenia'
  • 'Eosiren is a subjective synonym of Eotheroides'
  • 'Eotherioidinae was reranked as the family Eotherioididae and belongs to Prorastomoidea'
  • 'Eotheroides belongs to Eotheroididae'
  • 'Eotheroididae belongs to Prorastomoidea'
  • 'Felsinotherium belongs to Metaxytheriinae'
  • 'Halitherium belongs to Halitheriinae'
  • 'Halitherium (Prototherium) was reranked as Prototherium and belongs to Eotheroididae'
  • 'Hippopotamus medius is recombined as Metaxytherium medium'
  • 'Hydrodamalidae was reranked as the subfamily Hydrodamalinae and belongs to Dugongidae'
  • 'Hydrodamalis belongs to Hydrodamalinae'
  • 'Metaxytheriinae belongs to Dugongidae'
  • 'Metaxytherium belongs to Metaxytheriinae'
  • 'Miosiren belongs to Miosireninae'
  • 'Miosireninae belongs to Dugongidae'
  • 'Prorastomidae belongs to Prorastomoidea'
  • 'Prorastomoidea belongs to Sirenia'
  • 'Protosiren belongs to Protosirenidae'
  • 'Protosirenidae belongs to Prorastomoidea'
  • 'Ribodon belongs to Trichechidae'
  • 'Ribodon limbatus belongs to Ribodon'
  • 'Rytiodontinae belongs to Dugongidae'
  • 'Rytiodus belongs to Rytiodontinae'
  • 'Sirenavus belongs to Sirenia'
  • 'Thalattosiren belongs to Halitheriinae'
  • 'Trichechoidea belongs to Sirenia'
  • 'Trichechus belongs to Trichechidae'
  • 'Trichecidae is corrected as Trichechidae and belongs to Trichechoidea'