Opinions from D. W. Rice 1998
- 'Acrophoca belongs to Monachinae'
- 'Aetiocetidae belongs to Crenaticeti'
- 'Agorophiidae belongs to Odontoceti'
- 'Albireonidae belongs to Delphinoidea'
- 'Allodesmus belongs to Phocoidea'
- 'Ambulocetidae belongs to Protocetoidea'
- 'Archaeoceti belongs to Cetacea'
- 'Arctocephalus belongs to Otariidae'
- 'Arctocephalus forsteri belongs to Arctocephalus' according to Lesson 1828
- 'Arctocephalus galapagoensis belongs to Arctocephalus' according to Heller 1904
- 'Arctocephalus gazella belongs to Arctocephalus' according to Peters 1875
- 'Arctocephalus townsendi belongs to Arctocephalus' according to Merriam 1897
- 'Arctophoca is a subjective synonym of Arctocephalus'
- 'Australophocaena is a subjective synonym of Phocaena'
- 'Balaena belongs to Balaenidae'
- 'Balaena ampullata is recombined as Hyperoodon ampullatus'
- 'Eschrichtius gibbosus is a nomen dubium'
- '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'
- 'Balaenoptera belongs to Balaenopterinae'
- 'Balaenoptera acutorostrata belongs to Balaenoptera'
- 'Balaenoptera bonaerensis belongs to Balaenoptera'
- 'Balaenoptera borealis belongs to Balaenoptera'
- 'Balaenoptera robusta is recombined as Eschrichtius robustus'
- 'Balaenopteridae belongs to Chaeomysticeti'
- 'Balaenopterinae belongs to Balaenopteridae'
- 'Balanadae is corrected as Balaenidae and belongs to Chaeomysticeti'
- 'Basilosauridae belongs to Basilosauroidea'
- 'Basilosauroidea belongs to Archaeoceti'
- 'Berardius belongs to Ziphiinae'
- 'Berardius arnuxii belongs to Berardius'
- 'Berardius hectori is recombined as Mesoplodon hectori'
- 'Brachydelphinae is corrected as Brachydelphininae and belongs to Pontoporiidae'
- 'Brachydelphinae is corrected as Brachydelphininae and belongs to Phocoenidae'
- 'Callorhinus belongs to Otariidae'
- 'Caperea belongs to Neobalaenidae'
- 'Cephalorhynchus belongs to Delphinidae'
- 'Cetotheriinae was reranked as the family Cetotheriidae and belongs to Chaeomysticeti'
- 'Chaeomysticeti belongs to Mysticeti'
- 'Champsodelphidae is replaced by Champsodelphinidae'
- 'Crenaticeti belongs to Mysticeti'
- 'Cystophora belongs to Phocinae'
- 'Dalpiazinidae belongs to Platanistoidea'
- 'Delphinapterus belongs to Monodontidae'
- 'Delphinapterus borealis is recombined as Lissodelphis borealis'
- 'Delphinoidea belongs to Odontoceti'
- 'Delphinus belongs to Delphinidae'
- 'Delphinus (Grampus) was reranked as Grampus and belongs to Delphinidae'
- 'Delphinus (Grampus) acutus is recombined as Lagenorhynchus acutus'
- 'Delphinus (Grampus) heavisidii is recombined as Cephalorhynchus heavisidii'
- 'Delphinus (Grampus) obscurus is recombined as Lagenorhynchus obscurus'
- 'Delphinus aduncus is recombined as Tursiops aduncus'
- 'Delphinus albirostris is recombined as Lagenorhynchus albirostris'
- 'Delphinus blainvillei is recombined as Pontoporia blainvillei'
- 'Delphinus bredanensis is recombined as Steno bredanensis'
- 'Delphinus capensis belongs to Delphinus' according to Gray 1828
- 'Delphinus chinensis is recombined as Sousa chinensis'
- 'Delphinus clymene is recombined as Stenella clymene'
- 'Delphinus coeruleoalbus is recombined as Stenella coeruleoalba'
- 'Delphinus commersonii is recombined as Cephalorhynchus commersonii'
- 'Delphinus cruciger is recombined as Lagenorhynchus cruciger'
- 'Delphinus delphis belongs to Delphinus'
- 'Delphinus densirostris is recombined as Mesoplodon densirostris'
- 'Stenella dubia is a nomen dubium'
- 'Delphinus eutropia is recombined as Cephalorhynchus eutropia'
- 'Delphinus fluviatilis is recombined as Sotalia fluviatilis'
- 'Delphinus frontalis is recombined as Stenella frontalis'
- 'Delphinus gangeticus is recombined as Platanista gangetica'
- 'Delphinus geoffrensis is recombined as Inia geoffrensis'
- 'Delphinus griseus is recombined as Grampus griseus'
- 'Delphinus leucas is recombined as Delphinapterus leucas'
- 'Delphinus longirostris is recombined as Stenella longirostris'
- 'Delphinus melas is recombined as Globicephala melas'
- 'Delphinus orca is recombined as Orcinus orca'
- 'Delphinus peronii is recombined as Lissodelphis peronii'
- 'Lissodelphis peroni is a misspelling of Lissodelphis peronii'
- 'Delphinus phocaenoides is recombined as Neophocaena phocaenoides'
- 'Delphinus phocoena is recombined as Phocoena phocoena'
- 'Delphinus tropicalis belongs to Delphinus' according to van Bree 1971
- 'Delphinus tropicalis belongs to Delphinus'
- 'Denticete is a subjective synonym of Odontoceti'
- 'Desmatophoca belongs to Phocoidea'
- 'Dioplodon europaeus is recombined as Mesoplodon europaeus'
- 'Dorudontidae belongs to Basilosauroidea'
- 'Dugong belongs to Dugonginae'
- 'Dugongidae belongs to Sirenia'
- 'Dugonginae belongs to Dugongidae'
- 'Dusignathinae belongs to Odobaenidae'
- 'Electra hectori is recombined as Cephalorhynchus hectori'
- 'Eoplatanistidae belongs to Eurhinodelphinoidea'
- 'Erignathus belongs to Phocinae'
- 'Eschrichtiidae belongs to Chaeomysticeti'
- 'Eurhinodelphidae is corrected as Eurhinodelphinidae and belongs to Eurhinodelphinoidea'
- 'Eurhinodelphoidea is corrected as Eurhinodelphinoidea and belongs to Odontoceti'
- 'Feresa attenuata belongs to Feresa'
- 'Globicephala belongs to Delphinidae'
- 'Globicephalus macrorhynchus is recombined as Globicephala macrorhynchus'
- 'Globiocephalidae is corrected as Globicephalidae and belongs to Delphinoidea' according to Nishiwaki 1963
- 'Homiphoca belongs to Monachinae'
- 'Hydrodamalidae was reranked as the subfamily Hydrodamalinae and belongs to Dugongidae'
- 'Hydrodamalis belongs to Hydrodamalinae'
- 'Hyperoodon belongs to Hyperoodontinae'
- 'Hyperoodon planifrons belongs to Hyperoodon'
- 'Hyperoodontidae is a subjective synonym of Ziphiidae'
- 'Hyperoodontinae belongs to Ziphiidae'
- 'Imagotaria belongs to Odobaenidae'
- 'Indopacetus belongs to Hyperoodontinae'
- 'Inia belongs to Iniidae'
- 'Iniana was reranked as the family Iniidae and belongs to Odontoceti'
- 'Kekenodontinae belongs to Crenaticeti'
- 'Kentriodontidae belongs to Delphinoidea'
- 'Kogia belongs to Kogiidae'
- 'Kogiidae belongs to Physeteroidea'
- 'Lagenodelphis belongs to Delphinidae'
- 'Lagenodelphis hosei belongs to Lagenodelphis'
- 'Lagenorhynchus belongs to Delphinidae'
- 'Leucopleurus is a subjective synonym of Lagenorhynchus'
- 'Lagenorhynchus electra is recombined as Peponocephala electra'
- 'Lagenorhynchus obliquidens belongs to Lagenorhynchus'
- 'Lipotes belongs to Lipotidae'
- 'Lipotes vexillifer belongs to Lipotes'
- 'Lipotidae belongs to Odontoceti'
- 'Lissodelphis belongs to Delphinidae'
- 'Llanocetidae belongs to Crenaticeti'
- 'Lobodontini belongs to Monachinae'
- 'Mammalodontidae belongs to Crenaticeti'
- 'Manati gigas is recombined as Hydrodamalis gigas'
- 'Manatus inunguis is recombined as Trichechus inunguis'
- 'Megaptera belongs to Megapterinae'
- 'Megaptera (Eschrichtius) was reranked as Eschrichtius and belongs to Eschrichtiidae'
- 'Megapterinae belongs to Balaenopteridae'
- 'Mesoplodon belongs to Hyperoodontinae'
- 'Mesoplodon bahamondi belongs to Mesoplodon' according to Reyes et al. 1996
- 'Mesoplodon bahamondi belongs to Mesoplodon'
- 'Mesoplodon bowdoini belongs to Mesoplodon'
- 'Mesoplodon carlhubbsi belongs to Mesoplodon' according to Moore 1963
- 'Mesoplodon carlhubbsi belongs to Mesoplodon'
- 'Mesoplodon ginkgodens belongs to Mesoplodon' according to Nishiwaki and Kamiya 1958
- 'Mesoplodon ginkgodens belongs to Mesoplodon'
- 'Mesoplodon grayi belongs to Mesoplodon'
- 'Mesoplodon hotaula is a subjective synonym of Mesoplodon ginkgodens'
- 'Mesoplodon mirum is corrected as Mesoplodon mirus and belongs to Mesoplodon'
- 'Mesoplodon peruvianus belongs to Mesoplodon'
- 'Mesoplodon stejnegeri belongs to Mesoplodon' according to True 1885
- 'Mesoplodon stejnegeri belongs to Mesoplodon'
- 'Mirounga belongs to Monachinae'
- 'Monachinae belongs to Phocidae'
- 'Monachus belongs to Monachinae'
- 'Monodon belongs to Monodontidae'
- 'Monodon monoceros belongs to Monodon'
- 'Monodontidae belongs to Delphinoidea'
- 'Mystacoceti is a subjective synonym of Mysticeti'
- 'Mysticete is a subjective synonym of Mysticeti'
- 'Mysticeti belongs to Cetacea'
- 'Neobalaenidae belongs to Chaeomysticeti'
- 'Neophocaena belongs to Phocoenidae'
- 'Neotherium belongs to Odobaenidae'
- 'Odobaenidae is corrected as Odobenidae and belongs to Pinnipedia'
- 'Odobeninae belongs to Odobaenidae'
- 'Odontoceti belongs to Cetacea'
- 'Ommatophoca rossii is corrected as Ommatophoca rossi and belongs to Ommatophoca'
- 'Orca (Feresa) was reranked as Feresa and belongs to Delphinidae'
- 'Orca (Orcaella) was reranked as Orcaella and belongs to Delphinidae'
- 'Orca (Orcaella) brevirostris is recombined as Orcaella brevirostris'
- 'Orcaellidae is a subjective synonym of Delphinidae'
- 'Orcinae is an invalid subgroup of Delphinidae'
- 'Orcinus belongs to Delphinidae'
- 'Otaria (Arctophoca) philippii is recombined as Arctocephalus philippii'
- 'Otaria californiana is recombined as Zalophus californianus'
- 'Otariina was reranked as the family Otariidae and belongs to Pinnipedia'
- 'Otariinae belongs to Otariidae'
- 'Pakicetinae belongs to Protocetoidea'
- 'Peponocephala belongs to Delphinidae'
- 'Phoca caspica is recombined as Pusa caspica'
- 'Phoca jubata is recombined as Eumetopias jubatus'
- 'Phoca leonina is recombined as Mirounga leonina'
- 'Phoca pusilla belongs to Phoca' according to Schreber 1775
- 'Phoca vitulina sibirica is recombined as Pusa sibirica'
- 'Phocadae is corrected as Phocidae and belongs to Phocoidea'
- 'Phocaena is corrected as Phocoena and belongs to Phocoenidae'
- 'Phocaena crassidens is recombined as Pseudorca crassidens'
- 'Phocaena dioptrica is recombined as Phocoena dioptrica'
- 'Phocaena spinipinnis belongs to Phocaena' according to Burmeister 1865
- 'Phocaena spinipinnis is recombined as Phocoena spinipinnis'
- 'Phocaenina was reranked as the family Phocoenidae and belongs to Odontoceti'
- 'Phocinae belongs to Phocidae'
- 'Phocini belongs to Phocinae'
- 'Phocoena australis is recombined as Lagenorhynchus australis'
- 'Phocoena dalli is recombined as Phocoenoides dalli'
- 'Phocoena sinus belongs to Phocoena' according to Norris and McFarland 1958
- 'Phocoena sinus belongs to Phocoena'
- 'Phocoenoides belongs to Phocoenidae'
- 'Phocoidea belongs to Pinnipedia'
- 'Physeter belongs to Physeteridae'
- 'Physeter (Euphysetes) simus is recombined as Kogia sima'
- 'Physeter bidens is recombined as Mesoplodon bidens'
- 'Physeter breviceps is recombined as Kogia breviceps'
- 'Physeter catodon is a subjective synonym of Physeter macrocephalus'
- 'Physeter macrocephalus belongs to Physeter'
- 'Physeteridae belongs to Physeteroidea'
- 'Physeteroidea belongs to Odontoceti'
- 'Pinnarctidion belongs to Phocoidea'
- 'Pinnipedia was reranked as a unranked clade and belongs to Ursida'
- 'Piscophoca belongs to Monachinae'
- 'Pithanodelphinae is corrected as Pithanodelphininae and belongs to Kentriodontidae'
- 'Platanista belongs to Platanistidae'
- 'Platanista gangetica minor belongs to Platanista gangetica'
- 'Platanistina was reranked as the family Platanistidae and belongs to Platanistoidea'
- 'Platanistoidea belongs to Odontoceti'
- 'Pontoporia belongs to Pontoporiidae'
- 'Pontoporiidae belongs to Odontoceti'
- 'Protocetidae belongs to Protocetoidea'
- 'Protocetoidea belongs to Archaeoceti'
- 'Pseudorca belongs to Delphinidae'
- 'Remingtonocetidae belongs to Remingtonocetoidea'
- 'Remingtonocetoidea belongs to Archaeoceti'
- 'Sotalia belongs to Delphinidae'
- 'Sotalia teuszii is recombined as Sousa teuszi'
- 'Sousa belongs to Delphinidae'
- 'Squalodelphidae belongs to Platanistoidea'
- 'Squalodontidae belongs to Platanistoidea'
- 'Steno belongs to Delphinidae'
- 'Steno (Stenella) was reranked as Stenella and belongs to Delphinidae'
- 'Steno attenuatus is recombined as Stenella attenuata'
- 'Susu is a subjective synonym of Platanista'
- 'Tasmacetus belongs to Ziphiidae'
- 'Tasmacetus shepherdi belongs to Tasmacetus'
- 'Trichechus belongs to Trichechidae'
- 'Trichechus dugon is recombined as Dugong dugon'
- 'Trichechus manatus belongs to Trichechus'
- 'Trichechus senegalensis belongs to Trichechus'
- 'Trichecidae is corrected as Trichechidae and belongs to Sirenia'
- 'Tursio truncatus is recombined as Tursiops truncatus'
- 'Tursiops belongs to Delphinidae'
- 'Tursiops gillii is recombined as Tursiops truncatus gillii'
- 'Tursiops parvimanus is a subjective synonym of Tursiops truncatus'
- 'Ursida belongs to Arctoidea'
- 'Waipatiidae belongs to Platanistoidea'
- 'Zignodelphidae is corrected as Zignodelphinidae and belongs to Odontoceti'
- 'Ziphiidae was reranked as the tribe Ziphiina and belongs to Ziphioidea'
- 'Ziphioidea belongs to Odontoceti'
- 'Ziphius belongs to Ziphiinae'
- 'Ziphius cavirostris belongs to Ziphius'