Opinions from D. P. Domning 1994
- 'Anomotherium belongs to Miosireninae'
- 'Anomotherium langewieschei belongs to Anomotherium'
- 'Archaeosiren stromeri is recombined as Eosiren stromeri'
- 'Caribosiren belongs to Halitheriinae'
- 'Caribosiren turneri belongs to Caribosiren'
- 'Cheirotherium subapenninum is recombined as Metaxytherium subapenninum'
- 'Corystosiren belongs to Dugonginae'
- 'Crenatosiren belongs to Dugonginae'
- 'Dioplotherium belongs to Dugonginae'
- 'Dioplotherium manigaulti belongs to Dioplotherium'
- 'Dugong belongs to Dugonginae'
- 'Dugongidae belongs to Sirenia'
- 'Dugonginae belongs to Dugongidae'
- 'Dusisiren belongs to Hydrodamalinae'
- 'Dusisiren dewana belongs to Dusisiren'
- 'Eosiren belongs to Halitheriinae'
- 'Eosiren abeli belongs to Eosiren'
- 'Eosiren libyca belongs to Eosiren'
- 'Eotherium aegyptiacum is recombined as Eotheroides aegyptiacum'
- 'Eotheroides belongs to Halitheriinae'
- 'Halianassa allisoni is recombined as Dioplotherium allisoni'
- 'Halitheriidae was reranked as the family Halitheriinae and belongs to Dugongidae'
- 'Halitherium belongs to Halitheriinae'
- 'Halitherium (Prototherium) was reranked as Prototherium and belongs to Halitheriinae'
- 'Halitherium christolii belongs to Halitherium'
- 'Halitherium olseni is recombined as Crenatosiren olseni'
- 'Halitherium serresii is recombined as Metaxytherium serresii'
- 'Halitherium veronense is recombined as Prototherium veronense'
- 'Hippopotamus medius is recombined as Metaxytherium medium'
- 'Hydrodamalidae was reranked as the subfamily Hydrodamalinae and belongs to Dugongidae'
- 'Hydrodamalis belongs to Hydrodamalinae'
- 'Hydrodamalis cuestae belongs to Hydrodamalis'
- 'Hydrodamalis spissa is a subjective synonym of Hydrodamalis cuestae'
- 'Manati gigas is recombined as Hydrodamalis gigas'
- 'Manatus inunguis is recombined as Trichechus inunguis'
- 'Metaxytherium belongs to Halitheriinae'
- 'Metaxytherium calvertense belongs to Metaxytherium'
- 'Metaxytherium floridanum belongs to Metaxytherium'
- 'Metaxytherium jordani is recombined as Dusisiren jordani'
- 'Metaxytherium krahuletzi belongs to Metaxytherium'
- 'Metaxytherium ortegense is a subjective synonym of Potamosiren magdalenensis'
- 'Miosiren belongs to Miosireninae'
- 'Miosiren kocki belongs to Miosiren'
- 'Miosireninae belongs to Trichechidae'
- 'Potamosiren belongs to Trichechinae'
- 'Potamosiren magdalenensis belongs to Potamosiren'
- 'Prorastomidae belongs to Sirenia'
- 'Prorastomus belongs to Prorastomidae'
- 'Prorastomus sirenoides belongs to Prorastomus'
- 'Protosiren belongs to Protosirenidae'
- 'Protosiren fraasi belongs to Protosiren'
- 'Protosirenidae belongs to Sirenia'
- 'Prototherium intermedium belongs to Prototherium'
- 'Pugmeodon schinzii is recombined as Halitherium schinzii'
- 'Ribodon belongs to Trichechinae'
- 'Ribodon limbatus belongs to Ribodon'
- 'Rytiodontinae is a subjective synonym of Dugonginae'
- 'Rytiodus belongs to Dugonginae'
- 'Rytiodus capgrandi belongs to Rytiodus'
- 'Trichechidae was reranked as the family Trichechinae and belongs to Trichechidae'
- 'Trichechus belongs to Trichechinae'
- 'Trichechus dugon is recombined as Dugong dugon'
- 'Trichechus manatus belongs to Trichechus'
- 'Trichechus manatus manatus belongs to Trichechus manatus'
- 'Trichechus senegalensis belongs to Trichechus'
- 'Trichecidae is corrected as Trichechidae and belongs to Sirenia'
- 'Xenosiren belongs to Dugonginae'