Opinions from O. Hampe 2006
- 'Apenophyseter is a subjective synonym of Idiorophus'
- 'Balaenodon is a nomen dubium'
- 'Balaenodon physaloides is a nomen dubium'
- 'Cetacea belongs to Cete'
- 'Diaphorocetus belongs to Hoplocetinae'
- 'Eudelphis mortezelensis is recombined as Scaldicetus mortezelensis'
- 'Helvicetus is a nomen dubium'
- 'Helvicetus rugosus is a nomen dubium'
- 'Hoplocetinae belongs to Physeteridae'
- 'Hoplocetus belongs to Hoplocetinae'
- 'Hoplocetus borgerhoutensis belongs to Hoplocetus'
- 'Hoplocetus crassidens belongs to Hoplocetus'
- 'Hoplocetus curvidens belongs to Hoplocetus'
- 'Hoplocetus minor is recombined as Scaldicetus minor'
- 'Hoplocetus obesus is a nomen dubium'
- 'Hoplocetus perpinguis is recombined as Scaldicetus perpinguis'
- 'Hoplocetus ritzi belongs to Hoplocetus'
- 'Idiorophus belongs to Hoplocetinae'
- 'Mesocetus poucheti is recombined as Diaphorocetus poucheti'
- 'Odontoceti belongs to Cetacea'
- 'Orca citoniensis is recombined as Orcinus citoniensis'
- 'Orca semseyi is an invalid subgroup of Physeteridae'
- 'Palaeodelphis grandis is recombined as Scaldicetus grandis'
- 'Physeteridae belongs to Physeteroidea'
- 'Physeteroidea belongs to Odontoceti'
- 'Physetodon baileyi is a nomen dubium'
- 'Physodon leccense is a nomen dubium'
- 'Physodon patagonicus is recombined as Idiorophus patagonicus'
- 'Scaldicetus belongs to Hoplocetinae'
- 'Scaldicetus bolzanensis is recombined as Idiorophus bolzanensis'
- 'Scaldicetus caretti belongs to Scaldicetus'
- 'Scaldicetus crispus is a nomen nudum'
- 'Scaldicetus degiorgii belongs to Scaldicetus'
- 'Scaldicetus inflatus belongs to Scaldicetus'
- 'Scaldicetus lodgei is a nomen dubium'
- 'Scaldicetus macgeei belongs to Scaldicetus'
- 'Scaldicetus shigensis belongs to Scaldicetus'
- 'Scaptodon lodderi is a nomen dubium'
- 'Schizodelphis elongatus is recombined as Miokogia elongatus'