Opinions from E. M. G. Fitzgerald 2010
- 'Aetiocetidae belongs to Mysticeti'
- 'Aetiocetus belongs to Aetiocetidae'
- 'Archaeoceti belongs to Cetacea'
- 'Ashorocetus is a nomen dubium'
- 'Ashorocetus eguchii is a nomen dubium'
- 'Basilosauridae belongs to Archaeoceti'
- 'Basilosaurus belongs to Basilosauridae'
- 'Basilosaurus kochii is recombined as Zygorhiza kochii'
- 'Chaeomysticeti belongs to Mysticeti'
- 'Chonecetus belongs to Aetiocetidae'
- 'Dorudon belongs to Basilosauridae'
- 'Georgiacetus vogtlensis belongs to Georgiacetus'
- 'Janjucetidae is a subjective synonym of Mammalodontidae'
- 'Janjucetus belongs to Mammalodontidae'
- 'Janjucetus hunderi belongs to Janjucetus'
- 'Kekenodon belongs to Kekenodontidae'
- 'Kekenodon onamata belongs to Kekenodon'
- 'Kekenodontinae was reranked as the family Kekenodontidae and belongs to Cetacea'
- 'Llanocetidae belongs to Mysticeti'
- 'Llanocetus belongs to Llanocetidae'
- 'Llanocetus denticrenatus belongs to Llanocetus'
- 'Mammalodon belongs to Mammalodontidae'
- 'Mammalodon colliveri belongs to Mammalodon'
- 'Mammalodontidae belongs to Mysticeti'
- 'Morawanocetus belongs to Aetiocetidae'
- 'Morawanocetus yabukii belongs to Morawanocetus'
- 'Mysticeti belongs to Neoceti'
- 'Neoceti belongs to Cetacea'
- 'Odontoceti belongs to Neoceti'
- 'Protocetidae belongs to Archaeoceti'
- 'Prozeuglodon atrox is recombined as Dorudon atrox'
- 'Simocetidae belongs to Odontoceti'
- 'Simocetus belongs to Simocetidae'
- 'Simocetus rayi belongs to Simocetus'
- 'Waipatia belongs to Waipatiidae'
- 'Waipatia maerewhenua belongs to Waipatia'
- 'Waipatiidae belongs to Odontoceti'
- 'Willungacetus belongs to Mysticeti'
- 'Willungacetus aldingensis belongs to Willungacetus'
- 'Zeuglodon isis is recombined as Basilosaurus isis'
- 'Zygorhiza belongs to Basilosauridae'