Opinions from M. D. Gottfried et al. 1994
- 'Aglaocetus belongs to Cetotheriidae'
- 'Aglaocetus patulus belongs to Aglaocetus'
- 'Araeodelphis belongs to Odontoceti'
- 'Araeodelphis natator belongs to Araeodelphis'
- 'Cephalotropis belongs to Cetotheriidae'
- 'Cephalotropis coronatus belongs to Cephalotropis'
- 'Cetotherium belongs to Cetotheriidae'
- 'Delphinapterus gabbii is recombined as Tretosphys gabbii'
- 'Delphinodon belongs to Kentriodontidae'
- 'Delphinus calvertensis is recombined as Lophocetus calvertensis'
- 'Diorocetus belongs to Cetotheriidae'
- 'Diorocetus hiatus belongs to Diorocetus'
- 'Eurhinodelphis belongs to Rhabdosteidae'
- 'Eurhinodelphis bossi belongs to Eurhinodelphis'
- 'Hadrodelphis belongs to Kentriodontidae'
- 'Hadrodelphis calvertense belongs to Hadrodelphis'
- 'Halicetus belongs to Cetotheriidae'
- 'Halicetus ignotus belongs to Halicetus'
- 'Kentriodon pernix belongs to Kentriodon'
- 'Liolithax belongs to Kentriodontidae'
- 'Lophocetus belongs to Kentriodontidae'
- 'Lophocetus pappus is recombined as Liolithax pappus'
- 'Mesocetus belongs to Cetotheriidae'
- 'Mesocetus siphunculus belongs to Mesocetus'
- 'Notocetus belongs to Squalodelphidae'
- 'Orycterocetus belongs to Physeteridae'
- 'Orycterocetus crocodilinus belongs to Orycterocetus'
- 'Paracetus mediatlanticus is recombined as Orycterocetus mediatlanticus'
- 'Parietobalaena belongs to Cetotheriidae'
- 'Parietobalaena palmeri belongs to Parietobalaena'
- 'Pelocetus belongs to Cetotheriidae'
- 'Pelocetus calvertensis belongs to Pelocetus'
- 'Pelodelphis belongs to Odontoceti'
- 'Pelodelphis gracilis belongs to Pelodelphis'
- 'Phocageneus belongs to Squalodelphidae'
- 'Phocageneus venustus belongs to Phocageneus'
- 'Pomatodelphis belongs to Platanistidae'
- 'Pomatodelphis inaequalis belongs to Pomatodelphis'
- 'Rhabdosteus belongs to Rhabdosteidae'
- 'Rhabdosteus latiradix belongs to Rhabdosteus'
- 'Squalodon belongs to Squalodontidae'
- 'Squalodon calvertensis belongs to Squalodon'
- 'Squalodon tiedemani belongs to Squalodon'
- 'Thinocetus belongs to Cetotheriidae'
- 'Thinocetus arthritus belongs to Thinocetus'
- 'Tretosphys belongs to Odontoceti'
- 'Zarhachis belongs to Platanistidae'
- 'Zarhachis flagellator belongs to Zarhachis'