Opinions from K. A. Zittel 1925

  • 'Acrodelphidae belongs to Odontoceti'
  • 'Acrodelphinae belongs to Acrodelphidae'
  • 'Acrodelphis belongs to Acrodelphidae'
  • 'Archaeoceti belongs to Cetacea'
  • 'Arctocephalus belongs to Otariidae'
  • 'Argyrocetinae belongs to Acrodelphidae'
  • 'Argyrocetus belongs to Argyrocetinae'
  • 'Arionius is a subjective synonym of Squalodon'
  • 'Aulocetus is a subjective synonym of Cetotherium'
  • 'Balaena belongs to Balaenidae'
  • 'Balaenidae belongs to Mysticeti'
  • 'Balaenodon is a subjective synonym of Scaldicetus'
  • 'Balaenoptera belongs to Balaenopteridae'
  • 'Balaenopteridae belongs to Mystacoceti'
  • 'Basilosaurus is a subjective synonym of Zeuglodon'
  • 'Belemnoziphius is a subjective synonym of Mesoplodon'
  • 'Beluga belongs to Beluginae'
  • 'Beluginae belongs to Acrodelphidae'
  • 'Berardius belongs to Ziphiinae'
  • 'Cetacea belongs to Mammalia'
  • 'Cetotherium belongs to Balaenopteridae'
  • 'Champsodelphis is a subjective synonym of Palaeoziphius'
  • 'Choneziphius belongs to Ziphiinae'
  • 'Cyrtodelphis belongs to Argyrocetinae'
  • 'Delphinidae belongs to Odontoceti'
  • 'Delphinodon is a subjective synonym of Squalodon'
  • 'Delphinopsis belongs to Phocaenini'
  • 'Delphinopsis freyeri belongs to Delphinopsis'
  • 'Delphinus belongs to Delphinidae'
  • 'Desmostylus belongs to Sirenia'
  • 'Desmostylus hesperus belongs to Desmostylus'
  • 'Dioplodon is a subjective synonym of Mesoplodon'
  • 'Dorudon is a subjective synonym of Zeuglodon'
  • 'Eocetus belongs to Zeuglodontidae'
  • 'Eosiren belongs to Sirenia'
  • 'Eotherium belongs to Sirenia'
  • 'Eucetus is a subjective synonym of Scaldicetus'
  • 'Eudelphis is a subjective synonym of Scaldicetus'
  • 'Eurhinodelphidae belongs to Odontoceti'
  • 'Eurhinodelphis belongs to Eurhinodelphidae'
  • 'Felsinotherium belongs to Sirenia'
  • 'Felsinotherium forestii belongs to Felsinotherium'
  • 'Globicephala is corrected as Globicephalus and belongs to Delphinidae'
  • 'Halianassa is a subjective synonym of Halitherium'
  • 'Halicore belongs to Sirenia'
  • 'Halicore cuvierii is recombined as Metaxytherium cuvieri'
  • 'Halitherium belongs to Sirenia'
  • 'Halitherium christolii is corrected as Halitherium christoli and belongs to Halitherium'
  • 'Halitherium serresii is recombined as Metaxytherium serresi'
  • 'Halitherium veronense belongs to Halitherium'
  • 'Herpetocetus belongs to Balaenopteridae'
  • 'Heterocetus belongs to Balaenopteridae'
  • 'Heterodelphis belongs to Acrodelphinae'
  • 'Heterodelphis leiodontus belongs to Heterodelphis'
  • 'Homaeocetus is a subjective synonym of Scaldicetus'
  • 'Hoplocetus is a subjective synonym of Scaldicetus'
  • 'Hyperoodon belongs to Ziphiinae'
  • 'Inia belongs to Iniinae'
  • 'Iniinae belongs to Acrodelphidae'
  • 'Ischyrorhynchus belongs to Argyrocetinae'
  • 'Ixacanthus belongs to Acrodelphinae'
  • 'Kekenodon omata is an invalid subgroup of Squalodontidae'
  • 'Kogia belongs to Physeterinae'
  • 'Leptophoca belongs to Phocidae'
  • 'Lobodon belongs to Phocidae'
  • 'Lophocetus belongs to Acrodelphinae'
  • 'Manatherium belongs to Sirenia'
  • 'Manatus belongs to Sirenia'
  • 'Mesocetus belongs to Balaenopteridae'
  • 'Mesocetus is an objective synonym of Eocetus'
  • 'Mesoplodon belongs to Ziphiinae'
  • 'Mesoteras belongs to Balaenopteridae'
  • 'Metaxytherium belongs to Sirenia'
  • 'Metaxytherium krahuletzi belongs to Metaxytherium'
  • 'Miosiren belongs to Sirenia'
  • 'Mioziphius belongs to Ziphiinae'
  • 'Monachus belongs to Phocidae'
  • 'Monodon belongs to Beluginae'
  • 'Monotherium is corrected as Monatherium and belongs to Phocidae'
  • 'Mystacoceti belongs to Cetacea'
  • 'Neosqualodon belongs to Squalodontidae'
  • 'Neosqualodon assenzae belongs to Neosqualodon'
  • 'Odontoceti belongs to Cetacea'
  • 'Orca belongs to Delphinidae'
  • 'Otaria belongs to Otariidae'
  • 'Otariina was reranked as the family Otariidae and belongs to Pinnipedia'
  • 'Pachyodon is a subjective synonym of Squalodon'
  • 'Palaeodelphis is a subjective synonym of Scaldicetus'
  • 'Palaeophocaena belongs to Phocaenini'
  • 'Palaeoziphius belongs to Ziphiinae'
  • 'Paleophoca is corrected as Palaeophoca and belongs to Phocidae'
  • 'Pappocetus belongs to Zeuglodontidae'
  • 'Phoca belongs to Phocidae'
  • 'Phoca ambigua is an invalid subgroup of Squalodontidae'
  • 'Phoca holitschensis belongs to Phoca'
  • 'Phoca pontica belongs to Phoca'
  • 'Phoca vindobonensis belongs to Phoca'
  • 'Phocaenina is corrected as Phocaenini and belongs to Delphinidae'
  • 'Phocaenopsis is a subjective synonym of Acrodelphis'
  • 'Phocidae belongs to Pinnipedia'
  • 'Phocodon is a subjective synonym of Squalodon'
  • 'Physeter belongs to Physeterinae'
  • 'Physeteridae belongs to Odontoceti'
  • 'Physeterinae belongs to Physeteridae'
  • 'Physeterula belongs to Physeterinae'
  • 'Physodon is a subjective synonym of Scaldicetus'
  • 'Pinnipedia was reranked as a suborder and belongs to Carnivora'
  • 'Pithanodelphis belongs to Delphinidae'
  • 'Placoziphius is a subjective synonym of Mioziphius'
  • 'Platanista belongs to Iniinae'
  • 'Plesiocetus belongs to Balaenopteridae'
  • 'Pontistes belongs to Iniinae'
  • 'Pontivaga belongs to Argyrocetinae'
  • 'Pontobasileus is a nomen vanum'
  • 'Pontoleon belongs to Otariidae'
  • 'Pontoporia belongs to Iniinae'
  • 'Priscodelphinus is a subjective synonym of Eurhinodelphis'
  • 'Pristiphoca belongs to Phocidae'
  • 'Prohalicore belongs to Sirenia'
  • 'Prophoca belongs to Phocidae'
  • 'Prophyseter belongs to Physeterinae'
  • 'Prorastomus belongs to Sirenia'
  • 'Prorastomus sirenoides belongs to Prorastomus'
  • 'Prosqualodon belongs to Squalodontidae'
  • 'Prosqualodon australis belongs to Prosqualodon'
  • 'Prosqualodon davidis is corrected as Prosqualodon davidi and belongs to Prosqualodon'
  • 'Protocetus belongs to Zeuglodontidae'
  • 'Protocetus atavus belongs to Protocetus'
  • 'Protophocaena belongs to Phocaenini'
  • 'Protosiren belongs to Sirenia'
  • 'Prozeuglodon atrox is a subjective synonym of Zeuglodon isis'
  • 'Pseudorca belongs to Delphinidae'
  • 'Pugmeodon schinzii is recombined as Halitherium schinzi'
  • 'Rhabdosteus belongs to Acrodelphinae'
  • 'Rhizoprion is a subjective synonym of Squalodon'
  • 'Rhytina belongs to Sirenia'
  • 'Rhytina stellerus is corrected as Rhytina stelleri and belongs to Rhytina'
  • 'Rytiodus is corrected as Rhytiodus and belongs to Sirenia'
  • 'Saurodelphis belongs to Argyrocetinae'
  • 'Scaldicetus belongs to Physeterinae'
  • 'Siphonocetus belongs to Balaenopteridae'
  • 'Sirenia was reranked as a suborder and belongs to Subungulata'
  • 'Squalodon belongs to Squalodontidae'
  • 'Squalodontidae belongs to Odontoceti'
  • 'Steno belongs to Delphinidae'
  • 'Subungulata was reranked as a order and belongs to Mammalia'
  • 'Thalassocetus belongs to Physeterinae'
  • 'Trichechidae belongs to Pinnipedia'
  • 'Tursiops belongs to Delphinidae'
  • 'Zarhachis belongs to Acrodelphinae'
  • 'Zeuglodon belongs to Zeuglodontidae'
  • 'Zeuglodon brachyspondylus belongs to Zeuglodon'
  • 'Zeuglodon cetoides belongs to Zeuglodon'
  • 'Zeuglodon harwoodi is an invalid subgroup of Squalodontidae'
  • 'Zeuglodon isis belongs to Zeuglodon'
  • 'Zeuglodon osiris belongs to Zeuglodon'
  • 'Zeuglodon wanklyni belongs to Zeuglodon'
  • 'Zeuglodon zitteli belongs to Zeuglodon'
  • 'Zeuglodontidae belongs to Archaeoceti'
  • 'Ziphiinae belongs to Physeteridae'
  • 'Ziphius belongs to Ziphiinae'