Opinions from D. P. Domning 2018
- 'Anomotherium belongs to Miosireninae'
- 'Bharatisiren belongs to Dugonginae'
- 'Caribosiren belongs to Halitheriinae'
- 'Corystosiren belongs to Dugonginae'
- 'Crenatosiren belongs to Dugonginae'
- 'Dioplotherium belongs to Dugonginae'
- 'Dugong belongs to Dugonginae'
- 'Dugongidae belongs to Sirenia'
- 'Dugonginae belongs to Dugongidae'
- 'Dusisiren belongs to Hydrodamalinae'
- 'Eosiren belongs to Halitheriinae'
- 'Eotheroides belongs to Halitheriinae'
- 'Halitherium belongs to Halitheriinae'
- 'Halitherium (Prototherium) was reranked as Prototherium and belongs to Halitheriinae'
- 'Hydrodamalidae was reranked as the subfamily Hydrodamalinae and belongs to Dugongidae'
- 'Hydrodamalis belongs to Hydrodamalinae'
- 'Metaxytherium belongs to Halitheriinae'
- 'Miosiren belongs to Miosireninae'
- 'Miosireninae belongs to Trichechidae'
- 'Pezosiren belongs to Prorastomidae'
- 'Potamosiren belongs to Trichechinae'
- 'Prorastomidae belongs to Sirenia'
- 'Prorastomus belongs to Prorastomidae'
- 'Protosiren belongs to Protosirenidae'
- 'Ribodon belongs to Trichechinae'
- 'Rytiodus belongs to Dugonginae'
- 'Sirenavus belongs to Halitheriinae'
- 'Trichechidae was reranked as the family Trichechinae and belongs to Trichechidae'
- 'Trichechus belongs to Trichechidae'
- 'Trichecidae is corrected as Trichechidae and belongs to Sirenia'
- 'Xenosiren belongs to Dugonginae'