Opinions from F. G. Marx 2011
- 'Aetiocetus cotylalveus belongs to Aetiocetus'
- 'Aetiocetus polydentatus belongs to Aetiocetus'
- 'Aetiocetus weltoni belongs to Aetiocetus'
- 'Aglaocetus patulus belongs to Aglaocetus'
- 'Archaebalaenoptera castriarquati belongs to Archaebalaenoptera'
- 'Aulocetus latus belongs to Aulocetus'
- 'Aulocetus sammarinensis is recombined as Titanocetus sammarinensis'
- 'Balaena cuvierii is recombined as Protororqualus cuvieri'
- 'Balaena glacialis is recombined as Eubalaena glacialis'
- 'Balaena marginata is recombined as Caperea marginata'
- 'Balaena musculus is recombined as Balaenoptera musculus'
- 'Balaena mysticetus belongs to Balaena'
- 'Balaena novaeangliae is recombined as Megaptera novaeangliae'
- 'Balaena physalus is recombined as Balaenoptera physalus'
- 'Balaena ricei belongs to Balaena'
- 'Balaenella brachyrhynus belongs to Balaenella'
- 'Balaenoptera acutorostrata belongs to Balaenoptera'
- 'Balaenoptera bonaerensis belongs to Balaenoptera'
- 'Balaenoptera borealis belongs to Balaenoptera'
- 'Balaenoptera edeni belongs to Balaenoptera'
- 'Balaenoptera omurai belongs to Balaenoptera'
- 'Balaenoptera robusta is recombined as Eschrichtius robustus'
- 'Balaenula astensis belongs to Balaenula'
- 'Basilosaurus kochii is recombined as Zygorhiza kochii'
- 'Cephalotropis nectus belongs to Cephalotropis'
- 'Cetotherium gastaldii is recombined as Eschrichtioides gastaldii'
- 'Cetotherium megalophysum belongs to Cetotherium'
- 'Cetotherium moreni is recombined as Aglaocetus moreni'
- 'Cetotherium rathkii is corrected as Cetotherium rathkei and belongs to Cetotherium'
- 'Cetotherium vandelli is recombined as Metopocetus vandelli'
- 'Chonecetus goedertorum belongs to Chonecetus'
- 'Cophocetus oregonensis belongs to Cophocetus'
- 'Diorocetus chichibuensis belongs to Diorocetus'
- 'Diorocetus hiatus belongs to Diorocetus'
- 'Eomysticetus whitmorei belongs to Eomysticetus'
- 'Eubalaena shinshuensis belongs to Eubalaena'
- 'Herpetocetus transatlanticus belongs to Herpetocetus'
- 'Isanacetus laticephalus belongs to Isanacetus'
- 'Janjucetus hunderi belongs to Janjucetus'
- 'Mammalodon colliveri belongs to Mammalodon'
- 'Mauicetus lophocephalus belongs to Mauicetus'
- 'Megaptera hubachi belongs to Megaptera'
- 'Megaptera miocaena belongs to Megaptera'
- 'Metopocetus durinasus belongs to Metopocetus'
- 'Mixocetus elysius belongs to Mixocetus'
- 'Nannocetus eremus belongs to Nannocetus'
- 'Parietobalaena palmeri belongs to Parietobalaena'
- 'Parietobalaena yamaokai belongs to Parietobalaena'
- 'Pelocetus calvertensis belongs to Pelocetus'
- 'Physeter catodon belongs to Physeter'
- 'Pinocetus belongs to Balaenopteroidea'
- 'Pinocetus polonicus belongs to Pinocetus'
- 'Piscobalaena nana belongs to Piscobalaena'
- 'Squalodon ehrlichii is recombined as Patriocetus ehrlichii'
- 'Uranocetus gramensis belongs to Uranocetus'