Opinions from R. Kellogg 1928
- 'Acrodelphis belongs to Delphinidae'
- 'Agabelus belongs to Delphinidae'
- 'Agorophiidae belongs to Odontoceti'
- 'Agorophius belongs to Agorophiidae'
- 'Agriocetus belongs to Odontoceti'
- 'Amphicetus belongs to Cetotheriidae'
- 'Anisodelphis belongs to Iniidae'
- 'Anoplonassa belongs to Ziphiidae'
- 'Archaeodelphis belongs to Odontoceti'
- 'Argyrocetus belongs to Delphinidae'
- 'Aulophyseter belongs to Physeteridae'
- 'Balaena belongs to Balaenidae'
- 'Balaenodon belongs to Physeteridae'
- 'Balaenoptera belongs to Balaenopteridae'
- 'Balaenopteridae belongs to Mysticeti'
- 'Balaenotus belongs to Balaenidae'
- 'Balaenula belongs to Balaenidae'
- 'Balanadae is corrected as Balaenidae and belongs to Mysticeti'
- 'Basilosauridae belongs to Archaeoceti'
- 'Basilosaurus belongs to Basilosauridae'
- 'Belemnoziphius belongs to Ziphiidae'
- 'Belosphys belongs to Delphinidae'
- 'Berardius belongs to Ziphiidae'
- 'Burtinopsis belongs to Balaenopteridae'
- 'Cephalotropis belongs to Cetotheriidae'
- 'Ceterhinops belongs to Delphinidae'
- 'Cetotheriinae was reranked as the family Cetotheriidae and belongs to Mysticeti'
- 'Cetotheriomorphus belongs to Cetotheriidae'
- 'Cetotheriopsis belongs to Cetotheriidae'
- 'Cetotherium belongs to Cetotheriidae'
- 'Cetotherium (Cetotheriophanes) was reranked as Cetotheriophanes and belongs to Balaenopteridae'
- 'Cetotherium (Eucetotherium) was reranked as Eucetotherium and belongs to Cetotheriidae'
- 'Cetotherium (Plesiocetopsis) was reranked as Plesiocetopsis and belongs to Cetotheriidae'
- 'Champsodelphis belongs to Delphinidae'
- 'Choneziphius belongs to Ziphiidae'
- 'Colophonodon belongs to Squalodontidae'
- 'Cyrtodelphis belongs to Delphinidae'
- 'Delphinapterus belongs to Delphinidae'
- 'Delphinavus belongs to Delphinidae'
- 'Delphinidae belongs to Odontoceti'
- 'Delphinodon belongs to Delphinidae'
- 'Delphinopsis belongs to Delphinidae'
- 'Delphinus belongs to Delphinidae'
- 'Diaphorocetus belongs to Physeteridae'
- 'Dinoziphius belongs to Physeteridae'
- 'Diochotichus belongs to Ziphiidae'
- 'Dorudon belongs to Dorudontidae'
- 'Dorudontidae belongs to Archaeoceti'
- 'Eboroziphius belongs to Ziphiidae'
- 'Eocetus belongs to Protocetidae'
- 'Eoplatanista belongs to Delphinidae'
- 'Eubalaena belongs to Balaenidae'
- 'Eurhinodelphis belongs to Delphinidae'
- 'Globicephala belongs to Delphinidae'
- 'Graphiodon belongs to Physeteridae'
- 'Herpetocetus belongs to Cetotheriidae'
- 'Hesperocetus belongs to Iniidae'
- 'Heterocetus belongs to Cetotheriidae'
- 'Heterodelphis belongs to Delphinidae'
- 'Hoplocetus belongs to Physeteridae'
- 'Idiocetus belongs to Balaenopteridae'
- 'Idiophyseter belongs to Physeteridae'
- 'Iniana was reranked as the family Iniidae and belongs to Odontoceti'
- 'Iniopsis belongs to Delphinidae'
- 'Ischyrorhynchus belongs to Iniidae'
- 'Isocetus belongs to Cetotheriidae'
- 'Ixacanthus belongs to Delphinidae'
- 'Kekenodon belongs to Dorudontidae'
- 'Kentriodon belongs to Delphinidae'
- 'Kogia belongs to Kogiidae'
- 'Kogiidae belongs to Odontoceti'
- 'Lonchodelphis is a nomen dubium'
- 'Lophocetus belongs to Delphinidae'
- 'Macrochirifer belongs to Delphinidae'
- 'Megaptera belongs to Balaenopteridae'
- 'Megapteropsis belongs to Balaenopteridae'
- 'Mesocetus belongs to Cetotheriidae'
- 'Mesoplodon belongs to Ziphiidae'
- 'Mesoplodon (Cetorhynchus) was reranked as Cetorhynchus and belongs to Ziphiidae'
- 'Mesoteras belongs to Balaenopteridae'
- 'Metasqualodon belongs to Squalodontidae'
- 'Metopocetus belongs to Cetotheriidae'
- 'Microcetus belongs to Squalodontidae'
- 'Microsqualodon belongs to Squalodontidae'
- 'Microzeuglodon belongs to Squalodontidae'
- 'Mioziphius belongs to Ziphiidae'
- 'Monodon belongs to Delphinidae'
- 'Morenocetus belongs to Balaenidae'
- 'Mysticeti belongs to Cetacea'
- 'Neosqualodon belongs to Squalodontidae'
- 'Notiocetus belongs to Balaenidae'
- 'Ontocetus belongs to Physeteridae'
- 'Orca citoniensis is recombined as Orcinus citoniensis'
- 'Orcinus belongs to Delphinidae'
- 'Orycterocetus belongs to Physeteridae'
- 'Pachyacanthus belongs to Cetotheriidae'
- 'Pachycetus belongs to Cetotheriidae'
- 'Palaeocetus belongs to Balaenidae'
- 'Palaeophocaena belongs to Delphinidae'
- 'Palaeoziphius belongs to Ziphiidae'
- 'Pappocetus belongs to Protocetidae'
- 'Parasqualodon belongs to Squalodontidae'
- 'Parietobalaena belongs to Cetotheriidae'
- 'Patriocetus belongs to Odontoceti'
- 'Pelycorhamphus belongs to Ziphiidae'
- 'Phoberodon belongs to Squalodontidae'
- 'Phocaena belongs to Delphinidae'
- 'Phocaenopsis belongs to Delphinidae'
- 'Phococetus belongs to Dorudontidae'
- 'Physeteridae belongs to Odontoceti'
- 'Physeterula belongs to Physeteridae'
- 'Physetodon belongs to Physeteridae'
- 'Pithanodelphis belongs to Delphinidae'
- 'Placoziphius belongs to Physeteridae'
- 'Platanistina was reranked as the family Platanistidae and belongs to Odontoceti'
- 'Plesiocetus belongs to Balaenopteridae'
- 'Pomatodelphis belongs to Delphinidae'
- 'Pontistes belongs to Delphinidae'
- 'Pontivaga belongs to Delphinidae'
- 'Pontoplanodes belongs to Iniidae'
- 'Prioinia is corrected as Proinia and belongs to Iniidae'
- 'Prionodelphis belongs to Squalodontidae'
- 'Priscodelphinus belongs to Delphinidae'
- 'Priscophyseter belongs to Physeteridae'
- 'Prophyseter belongs to Physeteridae'
- 'Prosqualodon belongs to Squalodontidae'
- 'Protobalaena belongs to Balaenidae'
- 'Protocetidae belongs to Archaeoceti'
- 'Protocetus belongs to Protocetidae'
- 'Protodelphinus belongs to Delphinidae'
- 'Protophocaena belongs to Delphinidae'
- 'Protoziphius is corrected as Proroziphius and belongs to Ziphiidae'
- 'Prozeuglodon belongs to Protocetidae'
- 'Pseudorca belongs to Delphinidae'
- 'Rhabdosteus belongs to Delphinidae'
- 'Rhegnopsis belongs to Cetotheriidae'
- 'Rhytisodon belongs to Squalodontidae'
- 'Saurocetus belongs to Squalodontidae'
- 'Saurodelphis is a subjective synonym of Pontoplanodes'
- 'Scaldicetus belongs to Physeteridae'
- 'Scaptodon belongs to Physeteridae'
- 'Schizodelphis is a subjective synonym of Cyrtodelphis'
- 'Siphonocetus belongs to Cetotheriidae'
- 'Squalodelphis belongs to Ziphiidae'
- 'Squalodontidae belongs to Odontoceti'
- 'Steno belongs to Delphinidae'
- 'Stenodelphis belongs to Delphinidae'
- 'Stereodelphis belongs to Delphinidae'
- 'Thalassocetus belongs to Physeteridae'
- 'Tretosphys belongs to Delphinidae'
- 'Tretulias belongs to Cetotheriidae'
- 'Trirhizodon belongs to Squalodontidae'
- 'Tursiops belongs to Delphinidae'
- 'Ulias belongs to Cetotheriidae'
- 'Xenorophus belongs to Agorophiidae'
- 'Zarhachis belongs to Platanistidae'
- 'Ziphiidae belongs to Odontoceti'
- 'Ziphiodelphis belongs to Delphinidae'
- 'Ziphioides belongs to Ziphiidae'
- 'Zygorhiza belongs to Dorudontidae'