Opinions from M. Bisconti et al. 2013
- 'Aglaocetidae is an invalid subgroup of Thalassotherii'
- 'Aglaocetus belongs to Thalassotherii'
- 'Aglaocetus patulus is an invalid subgroup of Thalassotherii'
- 'Aulocetus sammarinensis is recombined as Titanocetus sammarinensis'
- 'Balaenomorpha belongs to Chaeomysticeti'
- 'Balaenopteridae belongs to Thalassotherii'
- 'Cetotheriinae was reranked as the family Cetotheriidae and belongs to Thalassotherii'
- 'Cetotherioidea is an invalid subgroup of Chaeomysticeti'
- 'Cetotherium belongs to Cetotheriidae'
- 'Cetotherium moreni is recombined as Aglaocetus moreni'
- 'Cetotherium rathkii belongs to Cetotherium'
- 'Cophocetus belongs to Thalassotherii'
- 'Cophocetus oregonensis belongs to Cophocetus'
- 'Diorocetidae is an invalid subgroup of Thalassotherii'
- 'Diorocetus belongs to Thalassotherii'
- 'Eschrichtiidae belongs to Thalassotherii'
- 'Herpetocetus belongs to Cetotheriidae'
- 'Herpetocetus bramblei belongs to Herpetocetus'
- 'Herpetocetus scaldiensis belongs to Herpetocetus'
- 'Herpetocetus transatlanticus belongs to Herpetocetus'
- 'Isanacetus belongs to Thalassotherii'
- 'Isanacetus laticephalus is an invalid subgroup of Isanacetus'
- 'Isocetus belongs to Thalassotherii'
- 'Isocetus depauwii is corrected as Isocetus depauwi and belongs to Isocetus'
- 'Joumocetus belongs to Thalassotherii'
- 'Joumocetus shimizui belongs to Joumocetus'
- 'Mesocetus argillarius is an invalid subgroup of Chaeomysticeti'
- 'Metopocetus belongs to Cetotheriidae'
- 'Metopocetus durinasus belongs to Metopocetus'
- 'Mixocetus belongs to Cetotheriidae'
- 'Mixocetus elysius belongs to Mixocetus'
- 'Nannocetus belongs to Cetotheriidae'
- 'Nannocetus eremus belongs to Nannocetus'
- 'Parietobalaena belongs to Thalassotherii'
- 'Parietobalaena campiniana belongs to Parietobalaena'
- 'Parietobalaena palmeri belongs to Parietobalaena'
- 'Pelocetidae is an invalid subgroup of Thalassotherii'
- 'Pelocetus belongs to Thalassotherii'
- 'Pelocetus calvertensis is an invalid subgroup of Pelocetus'
- 'Piscobalaena belongs to Cetotheriidae'
- 'Piscobalaena nana belongs to Piscobalaena'
- 'Thalassotherii belongs to Balaenomorpha'
- 'Titanocetus belongs to Thalassotherii'
- 'Uranocetus belongs to Thalassotherii'
- 'Uranocetus gramensis belongs to Uranocetus'