Opinions from A. B. Van Deinse 1931
- 'Acrodelphidae belongs to Squaloceti'
- 'Agorophiidae belongs to Archaeoceti'
- 'Amphicetus verus is recombined as Plesiocetus verus'
- 'Archaeoceti belongs to Odontoceti'
- 'Argyrocetinae belongs to Platanistidae'
- 'Balaenopteridae belongs to Mystacoceti'
- 'Balanadae is corrected as Balaenidae and belongs to Mystacoceti'
- 'Cetotherium brevifrons is recombined as Plesiocetus brevifrons'
- 'Delphinidae belongs to Delphinoceti'
- 'Delphinoceti belongs to Odontoceti'
- 'Eurhinodelphidae belongs to Squaloceti'
- 'Heterocetus affinis is recombined as Plesiocetus affinis'
- 'Heterocetus sprangii is recombined as Plesiocetus sprangi'
- 'Idiocetus longifrons is recombined as Plesiocetus longifrons'
- 'Mesocetus latifrons is recombined as Plesiocetus latifrons'
- 'Mesocetus laxatus is recombined as Plesiocetus laxatus'
- 'Mesocetus longirostris is recombined as Plesiocetus longirostris'
- 'Microzeuglodontidae belongs to Archaeoceti'
- 'Mystacoceti belongs to Cetacea'
- 'Odontoceti was reranked as a unranked clade and belongs to Cetacea'
- 'Patriocetidae belongs to Archaeoceti'
- 'Phocaenina was reranked as the family Phocaenidae and belongs to Delphinoceti'
- 'Physeteridae belongs to Squaloceti'
- 'Scaldicetus belongs to Physeteridae'
- 'Scaldicetus caretti belongs to Scaldicetus'
- 'Squaloceti belongs to Odontoceti'
- 'Squalodelphidae belongs to Squaloceti'
- 'Squalodontidae belongs to Squaloceti'
- 'Zeuglodontidae belongs to Archaeoceti'
- 'Ziphiidae belongs to Squaloceti'