Opinions from E. L. Trouessart 1904
- 'Acrodelphis belongs to Platanistinae'
- 'Acrodelphis krahuletzi belongs to Acrodelphis'
- 'Agabelus belongs to Eurhinodelphinae'
- 'Agabelus porcatus belongs to Agabelus'
- 'Agaphelus belongs to Balaenopterinae'
- 'Agaphelus glaucus is recombined as Rachianectes glaucus'
- 'Agorophius belongs to Squalodontidae'
- 'Alachtherium is a subjective synonym of Trichechus'
- 'Amphicetus belongs to Balaenopterinae'
- 'Amphicetus editus belongs to Amphicetus'
- 'Amphicetus later belongs to Amphicetus'
- 'Amphicetus rotundus belongs to Amphicetus'
- 'Amphicetus verus belongs to Amphicetus'
- 'Amphitera belongs to Balaenopterinae'
- 'Amphitera pacifica belongs to Amphitera' according to Gigoli 1870
- 'Amphitera pacifica belongs to Amphitera'
- 'Anoplonassa belongs to Ziphiinae'
- 'Anoplonassa forcipata belongs to Anoplonassa'
- 'Aporotus belongs to Ziphiinae'
- 'Aporotus affinis belongs to Aporotus'
- 'Aporotus dicyrtus belongs to Aporotus'
- 'Aporotus recurvirostris belongs to Aporotus'
- 'Archaeocetus belongs to Balaenopterinae'
- 'Arctocephalus belongs to Otariidae'
- 'Arctocephalus (Arctocephalus) belongs to Arctocephalus'
- 'Arctocephalus argentata belongs to Arctocephalus' according to Philippi 1892
- 'Arctocephalus argentata is recombined as Arctocephalus (Arctocephalus) argentata'
- 'Arctocephalus australis gracilis belongs to Arctocephalus australis' according to Nehring 1887
- 'Arctocephalus australis gracilis is recombined as Arctocephalus (Arctocephalus) australis gracilis'
- 'Arctocephalus brachydactyla belongs to Arctocephalus' according to Philippi 1892
- 'Arctocephalus brachydactyla is recombined as Arctocephalus (Arctocephalus) brachydactyla'
- 'Arctocephalus elegans belongs to Arctocephalus' according to Peters 1875
- 'Arctocephalus forsteri is recombined as Arctocephalus (Arctocephalus) forsteri'
- 'Arctocephalus gazella is recombined as Arctocephalus (Arctocephalus) gazella'
- 'Arctocephalus hookeri is recombined as Phocarctos hookeri'
- 'Arctocephalus leucostoma belongs to Arctocephalus' according to Philippi 1892
- 'Arctocephalus leucostoma is recombined as Arctocephalus (Arctocephalus) leucostoma'
- 'Arctocephalus lobatus is recombined as Eumetopias (Zalophus) lobatus'
- 'Arctocephalus townsendi is recombined as Arctocephalus (Arctocephalus) townsendi'
- 'Arctocephalus williamsi is a subjective synonym of Eumetopias (Zalophus) lobatus'
- 'Arctophoca is a subjective synonym of Arctocephalus'
- 'Argyrocetinae belongs to Platanistidae'
- 'Argyrocetus patagonicus belongs to Argyrocetus'
- 'Argyrodelphis belongs to Platanistinae'
- 'Arionius servatus is recombined as Squalodon servatus'
- 'Aulocetus belongs to Balaenopterinae'
- 'Aulocetus calaritanus belongs to Aulocetus'
- 'Aulocetus lovisati belongs to Aulocetus'
- 'Aulocetus sammarinensis belongs to Aulocetus'
- 'Balaena belongs to Balaeninae'
- 'Balaena (Balaenoptera) tschudii belongs to Balaena (Balaenoptera)' according to Reichenbach 1846
- 'Balaena (Balaenoptera) tschudii is recombined as Balaenoptera patachonicha tschudii'
- 'Balaena affinis belongs to Balaena'
- 'Balaena arcuata belongs to Balaena'
- 'Balaena australis belongs to Balaena'
- 'Balaena balaenopsis belongs to Balaena'
- 'Balaena balsami belongs to Balaena'
- 'Balaena biscayensis is a subjective synonym of Balaena glacialis'
- 'Megaptera boops is a subjective synonym of Megaptera nodosa'
- 'Balaena cortesii is recombined as Balaenoptera cuvieri cortesii'
- 'Balaena cuvierii is recombined as Balaenoptera cuvieri'
- 'Balaena definata is recombined as Balaenoptera definata'
- 'Balaena dubia is recombined as Balaenoptera definata dubia'
- 'Balaena emarginata is recombined as Balaenoptera emarginata'
- 'Balaena etrusca belongs to Balaena'
- 'Balaena gibbosa is recombined as Agaphelus gibbosus'
- 'Balaena glacialis belongs to Balaena'
- 'Balaena islandica is a subjective synonym of Balaena glacialis'
- 'Balaena lamanoni is recombined as Balaena glacialis lamanoni'
- 'Balaena lartetii is corrected as Balaena larteti and belongs to Balaena'
- 'Megaptera longimana is a subjective synonym of Megaptera nodosa'
- 'Balaena macrocephalus belongs to Balaena'
- 'Balaena marginata is recombined as Neobalaena marginata'
- 'Balaena molassica is recombined as Aulocetus molassicus'
- 'Balaena montalionis belongs to Balaena'
- 'Balaena musculus is recombined as Balaenoptera musculus'
- 'Balaena mysticetoides is recombined as Cetotherium mysticetoides'
- 'Balaena mysticetus belongs to Balaena'
- 'Balaena mysticetus pittekajensis belongs to Balaena mysticetus'
- 'Balaena mysticetus roysii belongs to Balaena mysticetus' according to Dall 1874
- 'Balaena mysticetus roysii belongs to Balaena mysticetus'
- 'Balaena nodosa is recombined as Megaptera nodosa'
- 'Balaena palaeatlantica is recombined as Rhegnopsis palaeatlanticus'
- 'Balaena pampaea belongs to Balaena'
- 'Balaena physalus is recombined as Balaenoptera physalus'
- 'Balaena primigenius [misspelled as Balaena primigenia] belongs to Balaena'
- 'Balaena prisca is recombined as Siphonocetus priscus'
- 'Balaena prisca is a subjective synonym of Megaptera nodosa'
- 'Balaena rostrata is recombined as Balaenoptera rostrata'
- 'Balaena sieboldii [misspelled as Balaena sieboldi] belongs to Balaena'
- 'Balaena simpsoni belongs to Balaena'
- 'Balaena sulcata belongs to Balaena' according to Neill 1811
- 'Balaena sulcata arctica is recombined as Balaenoptera arctica'
- 'Balaeninae belongs to Balaenidae'
- 'Balaenodon linzianus is a subjective synonym of Aulocetus molassicus'
- 'Balaenodon physaloides is recombined as Hoplocetus physaloides'
- 'Balaenoptera belongs to Balaenopterinae'
- 'Balaenoptera was reranked as Balaena (Balaenoptera) and belongs to Balaena' according to Reichenbach 1846
- 'Balaenoptera acutorostrata belongs to Balaenoptera'
- 'Balaenoptera alba belongs to Balaenoptera' according to Giglioli 1870
- 'Balaenoptera alba is recombined as Balaenoptera swinhoei alba'
- 'Balaenoptera andrejewi belongs to Balaenoptera' according to Anonymous 1888
- 'Balaenoptera andrejewi belongs to Balaenoptera'
- 'Balaenoptera antarctica belongs to Balaenoptera'
- 'Balaenoptera blythi belongs to Balaenoptera' according to Anderson 1879
- 'Balaenoptera blythi belongs to Balaenoptera'
- 'Balaenoptera bonaerensis belongs to Balaenoptera'
- 'Balaenoptera borealis belongs to Balaenoptera'
- 'Balaenoptera edeni belongs to Balaenoptera'
- 'Balaenoptera grimmi belongs to Balaenoptera' according to Anonymous 1888
- 'Balaenoptera grimmi belongs to Balaenoptera'
- 'Balaenoptera huttoni is recombined as Balaenoptera bonaerensis huttoni'
- 'Balaenoptera indica belongs to Balaenoptera'
- 'Balaenoptera juddi belongs to Balaenoptera'
- 'Balaenoptera musculoides belongs to Balaenoptera'
- 'Balaenoptera patachonica [misspelled as Balaenoptera patachonicha] belongs to Balaenoptera'
- 'Balaenoptera physalus quoyi is recombined as Balaenoptera quoyi'
- 'Balaenoptera robusta is recombined as Plesiocetus robustus'
- 'Balaenoptera rostratella is recombined as Balaenoptera emarginata rostratella'
- 'Balaenoptera schlegelii [misspelled as Balaenoptera schlegeli] belongs to Balaenoptera'
- 'Balaenoptera sibbaldina is recombined as Balaenoptera definata sibbaldina'
- 'Balaenoptera sulfureus [misspelled as Balaenoptera sulfurea] belongs to Balaenoptera'
- 'Balaenoptera sursiplana belongs to Balaenoptera'
- 'Balaenoptera swinhoei is recombined as Balaenoptera schlegeli swinhoei'
- 'Balaenoptera velifera belongs to Balaenoptera'
- 'Balaenoptera velifera copei belongs to Balaenoptera velifera' according to Elliot 1901
- 'Balaenoptera velifera copei belongs to Balaenoptera velifera'
- 'Balaenopterinae belongs to Balaenidae'
- 'Balaenotus insignis is recombined as Balaena insignis'
- 'Balaenotus lawley is recombined as Balaena lawleyi'
- 'Balaenotus meneghinii is recombined as Balaena meneghinii'
- 'Basilosauridae belongs to Zeuglodonta'
- 'Basilosaurus belongs to Basilosauridae'
- 'Belemnoziphius compressus is recombined as Mesoplodon compressus'
- 'Belemnoziphius prorops is recombined as Mesoplodon prorops'
- 'Belemnoziphius recurvus is recombined as Mesoplodon recurvus'
- 'Berardiopsis belongs to Ziphiinae'
- 'Berardiopsis pliocaenus belongs to Berardiopsis'
- 'Berardius belongs to Ziphiinae'
- 'Berardius arnuxii [misspelled as Berardius arnouxi] belongs to Berardius'
- 'Berardius bairdii is corrected as Berardius bairdi and belongs to Berardius'
- 'Berardius hectori is recombined as Mesoplodon hectori'
- 'Burtinopsis minutus is recombined as Megaptera minuta'
- 'Burtinopsis similis is recombined as Megaptera similis'
- 'Callocephalus is a subjective synonym of Phoca'
- 'Callophoca belongs to Phocinae'
- 'Callophoca obscura belongs to Callophoca'
- 'Callorhinus is a subjective synonym of Callotaria'
- 'Callorhinus alascanus belongs to Callorhinus' according to Jordan and Clark 1899
- 'Callorhinus alascanus is recombined as Arctocephalus (Callotaria) alaskanus'
- 'Callorhinus kurilensis belongs to Callorhinus' according to Jordan and Clark 1899
- 'Callorhinus kurilensis is recombined as Arctocephalus (Callotaria) kurilensis'
- 'Callotaria was reranked as Arctocephalus (Callotaria) and belongs to Arctocephalus'
- 'Catodon vetus is recombined as Physeter antiquus vetus'
- 'Cephalorhynchus belongs to Delphinidae'
- 'Cephalorhynchus albifrons is recombined as Cephalorhynchus hectori albifrons'
- 'Cephalotropis is corrected as Cephalotropus and belongs to Balaenidae'
- 'Cephalotropis coronatus [misspelled as Cephalotropus coronatus] belongs to Cephalotropus'
- 'Ceterhinops belongs to Squalodontidae'
- 'Ceterhinops longifrons belongs to Ceterhinops'
- 'Cetophis belongs to Platanistidae'
- 'Cetophis heteroclitus belongs to Cetophis'
- 'Cetotherium belongs to Balaenopterinae'
- 'Cetotherium (Cetotheriophanes) capellinii is recombined as Balaenoptera capellinii'
- 'Cetotherium (Plesiocetopsis) belongs to Cetotherium'
- 'Cetotherium ambiguum belongs to Cetotherium'
- 'Cetotherium brevifrons is recombined as Heterocetus brevifrons'
- 'Cetotherium dubium is recombined as Plesiocetus dubius'
- 'Cetotherium gastaldii is recombined as Balaenoptera gastaldii'
- 'Cetotherium helmersenii [misspelled as Cetotherium helmerseni] belongs to Cetotherium'
- 'Cetotherium incertum belongs to Cetotherium'
- 'Cetotherium klinderi belongs to Cetotherium'
- 'Cetotherium mayeri is corrected as Cetotherium meyeri and belongs to Cetotherium'
- 'Cetotherium megalophysum belongs to Cetotherium'
- 'Cetotherium moreni belongs to Cetotherium'
- 'Cetotherium parvum belongs to Cetotherium'
- 'Cetotherium pusillum belongs to Cetotherium'
- 'Cetotherium rathkii is corrected as Cetotherium rathkei and belongs to Cetotherium'
- 'Cetotherium vandelli is recombined as Plesiocetus vandellii'
- 'Champsodelphis belongs to Platanistinae'
- 'Champsodelphis acutus belongs to Champsodelphis'
- 'Champsodelphis carniolicus belongs to Champsodelphis'
- 'Champsodelphis cristatus is recombined as Acrodelphis cristatus'
- 'Champsodelphis denticulatus is recombined as Acrodelphis denticulatus'
- 'Champsodelphis dubius belongs to Champsodelphis'
- 'Champsodelphis fuchsii is recombined as Acrodelphis fuchsi'
- 'Champsodelphis italicus belongs to Champsodelphis'
- 'Champsodelphis karreri is recombined as Acrodelphis karreri'
- 'Champsodelphis letochae is recombined as Acrodelphis letochae'
- 'Champsodelphis macrognathus is recombined as Acrodelphis macrognathus'
- 'Champsodelphis ombonii is recombined as Acrodelphis ombonii'
- 'Champsodelphis scaldensis is recombined as Acrodelphis scaldensis'
- 'Cheirotherium subapenninum is recombined as Felsinotherium subappeninum'
- 'Choneziphius belongs to Ziphiinae'
- 'Choneziphius liops belongs to Choneziphius'
- 'Choneziphius packardi belongs to Choneziphius'
- 'Choneziphius trachops belongs to Choneziphius'
- 'Chronozoon belongs to Halicoridae'
- 'Chronozoon australae [misspelled as Chronozoon australe] belongs to Chronozoon'
- 'Clymene burmeisteri is recombined as Prodelphinus burmeisteri'
- 'Colophonodon holmesii is recombined as Squalodon holmesi'
- 'Crassitherium belongs to Halicoridae'
- 'Crassitherium robustum belongs to Crassitherium' according to Van Beneden 1871
- 'Crassitherium robustum belongs to Crassitherium'
- 'Cynodictis gracilis is recombined as Aymardia gracilis'
- 'Cynodon aymardi is recombined as Aymardia aymardi'
- 'Cynodon speciosus is recombined as Aymardia speciosa'
- 'Cynodon velaunus is recombined as Aymardia velauna'
- 'Cynorca proterva is recombined as Squalodon protervus'
- 'Cyphonotus is a subjective synonym of Agaphelus'
- 'Cyrtodelphis belongs to Platanistinae'
- 'Cystophora belongs to Cystophorinae'
- 'Cystophorina is corrected as Cystophorinae and belongs to Phocidae'
- 'Delphinapterinae belongs to Delphinidae'
- 'Delphinapterus belongs to Delphinapterinae'
- 'Delphinapterus (Pachypleurus) fockii is recombined as Archaeocetus focki'
- 'Delphinapterus (Pachypleurus) nordmanni is recombined as Archaeocetus nordmanni'
- 'Delphinapterus beluga is a subjective synonym of Delphinapterus leucas'
- 'Delphinapterus brocchii belongs to Delphinapterus'
- 'Delphinapterus gabbii is recombined as Priscodelphinus gabbi'
- 'Delphinapterus lacertosus is recombined as Priscodelphinus lacertosus'
- 'Delphinapterus lessonii is a subjective synonym of Lissodelphis peroni'
- 'Delphinapterus orcinus belongs to Delphinapterus'
- 'Delphinapterus ruschenbergeri is recombined as Priscodelphinus ruschenbergeri'
- 'Delphinidae belongs to Odontoceti'
- 'Delphinodon belongs to Eurhinodelphinae'
- 'Delphinodon leidyi belongs to Delphinodon'
- 'Delphinopsis belongs to Platanistinae'
- 'Delphinopsis freyeri belongs to Delphinopsis'
- '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 heavisidei'
- 'Delphinus (Grampus) obscurus is recombined as Lagenorhynchus obscurus'
- 'Delphinus (Phocaena) uncidens is recombined as Globicephalus uncidens'
- 'Delphinus (Steno) lentiginosus is recombined as Sotalia lentiginosus'
- 'Delphinus abusalam is recombined as Tursiops abusalam'
- 'Delphinus aduncus is recombined as Tursiops aduncus'
- 'Delphinus albigena belongs to Delphinus'
- 'Delphinus albirostris is recombined as Lagenorhynchus albirostris'
- 'Delphinus amphitriteus is recombined as Prodelphinus amphitriteus'
- 'Delphinus asthenops belongs to Delphinus'
- 'Delphinus blainvillei is recombined as Stenodelphis blainvillei'
- 'Delphinus breviceps is recombined as Lagenorhynchus thicolea breviceps'
- 'Delphinus brocchi is recombined as Delphinapterus brochii'
- 'Delphinus calvertensis is recombined as Lophocetus calvertensis'
- 'Delphinus canaliculatus is a subjective synonym of Cyrtodelphis sulcatus'
- 'Delphinus capensis is a subjective synonym of Prodelphinus attenuatus'
- 'Delphinus coeruleoalbus is recombined as Prodelphinus caeruleoalbus'
- 'Delphinus conradi is recombined as Ixacanthus conradi'
- 'Delphinus cortesii is recombined as Tursiops cortesii'
- 'Delphinus crotaphiscus is recombined as Prodelphinus crotaphiscus'
- 'Delphinus cruciger is recombined as Lagenorhynchus cruciger'
- 'Delphinus dationum is recombined as Champsodelphis dationum'
- 'Delphinus delphis belongs to Delphinus'
- 'Delphinus densirostris is recombined as Mesoplodon densirostris'
- 'Delphinus dubius is recombined as Prodelphinus dubius'
- 'Delphinus dussumieri belongs to Delphinus'
- 'Delphinus dussumieri belongs to Delphinus' according to Blanford 1891
- 'Delphinus euphrosyne is recombined as Prodelphinus euphrosine'
- 'Delphinus eutropia is recombined as Cephalorhynchus eutropia'
- 'Delphinus fitzroyi is recombined as Lagenorhynchus fitzroyi'
- 'Delphinus fluviatilis is recombined as Sotalia tucuxi fluviatilis'
- 'Delphinus frenatus is recombined as Prodelphinus frenatus'
- 'Delphinus frithii [misspelled as Delphinus frithi] belongs to Delphinus'
- 'Delphinus frontatus is recombined as Steno frontatus'
- 'Delphinus gangeticus is recombined as Platanista gangetica'
- 'Delphinus geoffrensis [misspelled as Inia geoffroyensis] belongs to Inia'
- 'Delphinus globiceps is a subjective synonym of Globicephalus melas'
- 'Delphinus griseus is recombined as Grampus griseus'
- 'Delphinus guianensis is recombined as Sotalia guianensis'
- 'Delphinus intermedius is recombined as Feresa intermedia'
- 'Delphinus karsteni is recombined as Globicephalus karsteni'
- 'Delphinus kingii is recombined as Delphinapterus kingi'
- 'Delphinus lateralis is recombined as Prodelphinus lateralis'
- 'Delphinus leucas is recombined as Delphinapterus leucas'
- 'Delphinus leucorhamphus is a subjective synonym of Lissodelphis peroni'
- 'Delphinus longirostris is recombined as Prodelphinus longirostris'
- 'Delphinus lophogenius is recombined as Acrodelphis lophogenius'
- 'Delphinus macrogenius is recombined as Champsodelphis macrogenius'
- 'Delphinus malayanus is recombined as Prodelphinus malayanus'
- 'Delphinus marginatus is a subjective synonym of Prodelphinus euphrosine'
- 'Delphinus mediterraneus is a subjective synonym of Delphinus delphis'
- 'Delphinus melas is recombined as Globicephalus melas'
- 'Delphinus occiduus belongs to Delphinus'
- 'Delphinus orca is recombined as Orcinus orca'
- 'Delphinus peronii is recombined as Lissodelphis peroni'
- 'Delphinus phocaenoides is recombined as Neophocaena phocaenoides'
- 'Delphinus phocoena is recombined as Phocaena phocaena'
- 'Delphinus plagiodon is recombined as Prodelphinus plagiodon'
- 'Schizodelphis planus is a subjective synonym of Cyrtodelphis sulcatus'
- 'Delphinus pliocaenicus is a subjective synonym of Delphinus delphis'
- 'Delphinus plumbeus is recombined as Sotalia plumbeus'
- 'Delphinus pseudodelphis is a subjective synonym of Cyrtodelphis sulcatus'
- 'Delphinus rectifrons is recombined as Pontistes rectifrons'
- 'Delphinus renovi [misspelled as Champsodelphis renoui] belongs to Champsodelphis'
- 'Delphinus restitutensis belongs to Delphinus'
- 'Delphinus roseiventris belongs to Delphinus'
- 'Delphinus sinensis is recombined as Sotalia sinensis'
- 'Delphinus sulcatus is recombined as Schizodelphis sulcatus'
- 'Delphinus superciliosus is recombined as Lagenorhynchus supercilliosus'
- 'Delphinus tetragorhinus is recombined as Champsodelphis tetragorhinus'
- 'Delphinus tursio obtusus is recombined as Tursiops tursio obtusus'
- 'Delphinus tursio obtusus belongs to Delphinus tursio' according to Schlegel 1862
- 'Delphinus vermontana is recombined as Delphinapterus vermontana'
- 'Desmostylus belongs to Halicoridae'
- 'Desmostylus hesperus belongs to Desmostylus'
- 'Diaphorocetus belongs to Physeterinae'
- 'Dinoziphius carolinensis is recombined as Physeter carolinensis'
- 'Diochotichus [misspelled as Diochoticus] belongs to Platanistinae'
- 'Diochotichus vanbenedeni belongs to Diochotichus'
- 'Dioplodon becanii is recombined as Mesoplodon becani'
- 'Dioplodon bononiensis is recombined as Mesoplodon bononiensis'
- 'Dioplodon danconae is recombined as Mesoplodon danconae'
- 'Dioplodon europaeus is recombined as Mesoplodon europaeus'
- 'Dioplodon farnesinae is recombined as Mesoplodon farnesinae'
- 'Dioplodon hemixem is recombined as Ziphirostrum hemixemi'
- 'Dioplodon lawley is recombined as Mesoplodon lawleyi'
- 'Dioplodon meneghinii is recombined as Mesoplodon meneghinii'
- 'Dioplodon senensis is recombined as Mesoplodon senensis'
- 'Dioplotherium belongs to Halicoridae'
- 'Dioplotherium manigaulti belongs to Dioplotherium'
- 'Dorudon belongs to Basilosauridae'
- 'Dorudon serratus belongs to Dorudon'
- 'Dugong is a subjective synonym of Halicore'
- 'Eboroziphius coelops is recombined as Choneziphius coelops'
- 'Electra hectori is recombined as Cephalorhynchus hectori'
- 'Procardia is replaced by Eoprocardia'
- 'Eocardia elliptica is recombined as Eoprocardia elliptica'
- 'Eoprocardia belongs to Eocardidae'
- 'Eosiren belongs to Halicoridae'
- 'Eosiren libyca belongs to Eosiren'
- 'Eotherium is a subjective synonym of Eotheroides'
- 'Eotherium aegyptiacum is recombined as Eotheroides aegyptiacum'
- 'Eotheroides belongs to Halicoridae'
- 'Epiodon chathamensis is recombined as Ziphius chathamensis'
- 'Erignathus was reranked as Phoca (Erignathus) and belongs to Phoca'
- 'Eschrichtius cephalus is recombined as Cetotherium cephalum'
- 'Eschrichtius davidsonii is recombined as Balaenoptera davidsoni'
- 'Eschrichtius leptocentrus is recombined as Cetotherium leptocentrum'
- 'Eschrichtius polyporus is recombined as Cetotherium polyporum'
- 'Eucetus belongs to Physeterinae'
- 'Eucetus amblyodon belongs to Eucetus'
- 'Eudelphis mortezelensis is recombined as Delphinus mortezelensis'
- 'Eumetopias belongs to Otariidae'
- 'Eumetopias (Eumetopias) belongs to Eumetopias'
- 'Eurhinodelphidae was reranked as the subfamily Eurhinodelphinae and belongs to Platanistidae'
- 'Eurhinodelphis belongs to Eurhinodelphinae'
- 'Eurhinodelphis ambiguus is a subjective synonym of Eurhinodelphis longirostris'
- 'Eurhinodelphis cocheteuxi belongs to Eurhinodelphis'
- 'Eurhinodelphis longirostris belongs to Eurhinodelphis'
- 'Eurhinodelphis sassariensis belongs to Eurhinodelphis'
- 'Eutropia is a subjective synonym of Cephalorhynchus'
- 'Felsinotherium belongs to Halicoridae'
- 'Felsinotherium forestii [misspelled as Felsinotherium foresti] belongs to Felsinotherium'
- 'Globicephala belongs to Delphinidae'
- 'Globicephala brachypterus is recombined as Globicephalus brachypterus'
- 'Globicephala sieboldii is recombined as Globiocephalus sieboldi'
- 'Globicephalus chilensis belongs to Globicephalus' according to Philippi 1896
- 'Globicephalus chilensis belongs to Globicephalus'
- 'Globicephalus indicus belongs to Globicephalus'
- 'Globicephalus macrorhynchus belongs to Globicephalus'
- 'Globicephalus scammonii [misspelled as Globicephalus scammoni] belongs to Globicephalus'
- 'Grampus richardsonii [misspelled as Grampus griseus richardsoni] belongs to Grampus griseus'
- 'Grampus sakamata is recombined as Grampus griseus sakamata'
- 'Grampus sowerbianus belongs to Grampus' according to Fischer 1881
- 'Grampus sowerbianus is recombined as Grampus griseus sowerbianus'
- 'Grampus stearnsii belongs to Grampus' according to Dall 1873
- 'Grampus stearnsii is recombined as Grampus griseus stearnsi'
- 'Graphiodon is a subjective synonym of Squalodon'
- 'Graphiodon vinearis is recombined as Squalodon vinearius'
- 'Gryphoca was reranked as Halichoerus (Gryphoca) and belongs to Halichoerus'
- 'Gryphoca similis is recombined as Halichoerus (Gryphoca) similis'
- 'Halarctus is a subjective synonym of Arctocephalus'
- 'Halichoerus belongs to Phocinae'
- 'Halichoerus (Halichoerus) belongs to Halichoerus'
- 'Halicore belongs to Halicoridae'
- 'Halicore australis [misspelled as Halicore australe] belongs to Halicore'
- 'Halicore hemprichii [misspelled as Halicore hemprichi] belongs to Halicore'
- 'Halicoridae belongs to Sirenia'
- 'Halicyon is a subjective synonym of Phoca'
- 'Halicyon richardi is recombined as Phoca richardsi' according to Gray 1864
- 'Halicyon richardi is recombined as Phoca richardsi'
- 'Haliphilus is a subjective synonym of Phoca'
- 'Halitherium belongs to Halicoridae'
- 'Halitherium bellunense is recombined as Metaxitherium bellunense'
- 'Halitherium canhami belongs to Halitherium'
- 'Halitherium chouqueti belongs to Halitherium'
- 'Halitherium veronense is recombined as Prorastomus veronensis'
- 'Heliophoca is a subjective synonym of Monachus'
- 'Hemicaulodon belongs to Halicoridae'
- 'Hemicaulodon effodiens belongs to Hemicaulodon'
- 'Herpetocetus belongs to Balaenopterinae'
- 'Herpetocetus scaldiensis belongs to Herpetocetus'
- 'Heterocetus belongs to Balaenopterinae'
- 'Heterocetus affinis belongs to Heterocetus'
- 'Heterocetus guiscardii belongs to Heterocetus'
- 'Heterocetus major belongs to Heterocetus' according to Stefano 1900
- 'Heterocetus major belongs to Heterocetus'
- 'Heterocetus sprangii belongs to Heterocetus'
- 'Heterodelphis belongs to Platanistinae'
- 'Heterodelphis klinderi belongs to Heterodelphis'
- 'Histriophoca was reranked as Phoca (Histriophoca) and belongs to Phoca'
- 'Homaeocetus is corrected as Homocetus and belongs to Physeterinae'
- 'Homaeocetus villersii is recombined as Homocetus villersi'
- 'Hoplocetus belongs to Physeterinae'
- 'Hoplocetus borgerhoutensis belongs to Hoplocetus'
- 'Hoplocetus crassidens belongs to Hoplocetus'
- 'Hoplocetus minor belongs to Hoplocetus'
- 'Hoplocetus obesus belongs to Hoplocetus'
- 'Hyperoodon belongs to Ziphiinae'
- 'Hyperoodon burmeisteri belongs to Hyperoodon'
- 'Hyperoodon planifrons belongs to Hyperoodon'
- 'Hyperoodon rostratum is corrected as Hyperoodon rostratus and belongs to Hyperoodon'
- 'Idiocetus belongs to Balaenopterinae'
- 'Idiocetus guicciardinii [misspelled as Idiocetus guicciardini] belongs to Idiocetus'
- 'Idiocetus longifrons belongs to Idiocetus'
- 'Inia belongs to Platanistinae'
- 'Inia boliviensis is a subjective synonym of Inia geoffroyensis'
- 'Iniopsis belongs to Platanistinae'
- 'Iniopsis caucasica belongs to Iniopsis'
- 'Ischyrorhynchus belongs to Platanistinae'
- 'Ischyrorhynchus vanbenedeni belongs to Ischyrorhynchus'
- 'Isocetus belongs to Balaenopterinae'
- 'Isocetus depauwii [misspelled as Isocetus depauxi] belongs to Isocetus'
- 'Ixacanthus belongs to Eurhinodelphinae'
- 'Ixacanthus coelospondylus belongs to Ixacanthus'
- 'Kekenodon onamata belongs to Kekenodon'
- 'Kogia belongs to Physeterinae'
- 'Kogia floweri is a subjective synonym of Kogia breviceps'
- 'Lagenorhynchus electra belongs to Lagenorhynchus'
- 'Lagenorhynchus floweri belongs to Lagenorhynchus'
- 'Lagenorhynchus obliquidens belongs to Lagenorhynchus'
- 'Lagenorhynchus similis belongs to Lagenorhynchus' according to Gray 1868
- 'Lagenorhynchus similis is a subjective synonym of Lagenorhynchus obscurus'
- 'Lagenorhynchus thicolea belongs to Lagenorhynchus'
- 'Leptonychotes was reranked as Ogmorhinus (Leptonychotes) and belongs to Ogmorhinus'
- 'Leptonyx is a subjective synonym of Leptonychotes'
- 'Lissodelphis belongs to Delphinidae'
- 'Lobodon was reranked as Ogmorhinus (Lobodon) and belongs to Ogmorhinus'
- 'Lophocetus belongs to Eurhinodelphinae'
- 'Macrochirifer belongs to Platanistinae'
- 'Macrochirifer vindobonensis belongs to Macrochirifer'
- 'Macrophoca atlantica is recombined as Squalodon atlanticus'
- 'Macrorhinus belongs to Cystophorinae'
- 'Manatherium belongs to Trichechidae'
- 'Manatherium delheidi belongs to Manatherium'
- 'Manatus americanus is a subjective synonym of Trichechus manatus'
- 'Manatus antiquus is recombined as Trichechus antiquus'
- 'Manatus coulombi is recombined as Eotheroides coulombi'
- 'Manatus giganteus is recombined as Trichechus giganteus'
- 'Manatus inornatus is recombined as Trichechus inornatus'
- 'Manatus inunguis is recombined as Trichechus inunguis'
- 'Manatus koellikeri is recombined as Trichechus koellikeri'
- 'Trichechus latirostris is a subjective synonym of Trichechus manatus'
- 'Manatus studeri is recombined as Metaxitherium studeri'
- 'Megaptera belongs to Balaenopterinae'
- 'Megaptera affinis belongs to Megaptera'
- 'Megaptera bellicosa is recombined as Megaptera nodosa bellicosa'
- 'Megaptera burmeisteri belongs to Megaptera'
- 'Megaptera expansa is recombined as Siphonocetus expansus'
- 'Megaptera indica belongs to Megaptera'
- 'Megaptera kuzira [misspelled as Megaptera kusira] belongs to Megaptera'
- 'Megaptera novaezelandiae is recombined as Megaptera nodosa novaezelandiae'
- 'Megaptera osphyia is recombined as Megaptera nodosa osphyia'
- 'Megaptera versabilis belongs to Megaptera'
- 'Mesocetus belongs to Balaenopterinae'
- 'Mesocetus agrami belongs to Mesocetus'
- 'Mesocetus aquitanicus belongs to Mesocetus'
- 'Mesocetus latifrons belongs to Mesocetus'
- 'Mesocetus laxatus is recombined as Idiocetus laxatus'
- 'Mesocetus longirostris belongs to Mesocetus'
- 'Mesocetus pinguis belongs to Mesocetus'
- 'Mesocetus poucheti is recombined as Diaphorocetus poucheti'
- 'Mesocetus siphunculus belongs to Mesocetus'
- 'Mesoplodon belongs to Ziphiinae'
- 'Mesoplodon (Cetorhynchus) christolii [misspelled as Cyrtodelphis christoli] belongs to Cyrtodelphis'
- 'Mesoplodon floweri is corrected as Mesoplodon floris and belongs to Mesoplodon'
- 'Mesoplodon grayi belongs to Mesoplodon'
- 'Mesoplodon scaphoides belongs to Mesoplodon'
- 'Mesoplodon stejnegeri belongs to Mesoplodon'
- 'Mesotaria belongs to Cystophorinae'
- 'Mesotaria ambigua belongs to Mesotaria'
- 'Mesoteras belongs to Balaenopterinae'
- 'Mesoteras kerrianus belongs to Mesoteras'
- 'Metaxytherium [misspelled as Metaxitherium] belongs to Halicoridae'
- 'Metaxytherium cordieri [misspelled as Metaxitherium cordieri] belongs to Metaxitherium'
- 'Metaxytherium krahuletzi [misspelled as Metaxitherium krahuletzi] belongs to Metaxitherium'
- 'Metaxytherium lovisati [misspelled as Metaxitherium lovisati] belongs to Metaxitherium'
- 'Metaxytherium pergense [misspelled as Metaxitherium pergense] belongs to Metaxitherium'
- 'Metopocetus belongs to Balaenopterinae'
- 'Metopocetus durinasus belongs to Metopocetus'
- 'Miosiren belongs to Halicoridae'
- 'Miosiren kocki belongs to Miosiren'
- 'Mirounga is a subjective synonym of Macrorhinus'
- 'Mirounga angustirostris is recombined as Macrorhinus angustirostris'
- 'Monachinae belongs to Phocidae'
- 'Monachus belongs to Monachinae'
- 'Monachus (Monachus) belongs to Monachus'
- 'Monodon belongs to Delphinapterinae'
- 'Monodon monoceros belongs to Monodon'
- 'Monotherium [misspelled as Monatherium] belongs to Monachinae'
- 'Monotherium aberratum is recombined as Monatherium aberratum'
- 'Monotherium affine [misspelled as Monatherium affine] belongs to Monatherium'
- 'Monotherium delognii [misspelled as Monatherium delognei] belongs to Monatherium'
- 'Neobalaena belongs to Balaenopterinae'
- 'Neomeris is replaced by Neophocaena'
- 'Neophocaena belongs to Delphinidae'
- 'Notiocetus belongs to Balaeninae'
- 'Notiocetus platensis belongs to Notiocetus'
- 'Notiocetus romerianus belongs to Notiocetus'
- 'Odobenotherium is a subjective synonym of Trichechus'
- 'Odobenotherium lartetianus is a subjective synonym of Trichechus rosmarus'
- 'Odobenus is a subjective synonym of Trichechus'
- 'Odobenus virginianus is a subjective synonym of Trichechus rosmarus'
- 'Odontobaenus is a subjective synonym of Trichechus'
- 'Odontoceti belongs to Cetacea'
- 'Ogmorhinus belongs to Monachinae'
- 'Ogmorhinus (Ogmorhinus) belongs to Ogmorhinus'
- 'Ommatophoca belongs to Monachinae'
- 'Ommatophoca rossii is corrected as Ommatophoca rossi and belongs to Ommatophoca'
- 'Ontocetus emmonsi is recombined as Hoplocetus emmonsi'
- 'Orca is replaced by Orcinus'
- 'Orca (Feresa) was reranked as Feresa and belongs to Delphinidae'
- 'Orca (Orcaella) brevirostris is recombined as Orcella brevirostris'
- 'Orca capensis is recombined as Orcinus orca capensis'
- 'Orca citoniensis is recombined as Orcinus citoniensis'
- 'Orca eschrichtii belongs to Orca' according to Reinhardt 1866
- 'Orca eschrichtii is recombined as Orcinus orca eschrichti'
- 'Orca gladiator is a subjective synonym of Orcinus orca'
- 'Orca magellanica is recombined as Orcinus orca magellanica'
- 'Orca meyeri is recombined as Orcinus meyeri'
- 'Orca pacifica is recombined as Orcinus orca pacifica'
- 'Orca rectipinna is recombined as Orcinus rectipinna'
- 'Orca semseyi is recombined as Orcinus semseyi'
- 'Orcaella fluminalis is recombined as Orcella brevirostris fluminalis'
- 'Orcella belongs to Delphinidae'
- 'Orcinus belongs to Delphinidae'
- 'Orycterocetus cornutidens is recombined as Physeter cornutidens'
- 'Orycterocetus quadratidens is recombined as Physeter quadratidens'
- 'Otaria belongs to Otariidae'
- 'Otaria australis is recombined as Arctocephalus australis'
- 'Otaria byronia belongs to Otaria'
- 'Otaria californiana is recombined as Eumetopias (Zalophus) californianus'
- 'Otaria fischeri is recombined as Arctocephalus (Arctocephalus) fischeri'
- 'Arctocephalus gilliespii is a subjective synonym of Eumetopias (Zalophus) californianus'
- 'Otaria leclercii is recombined as Mesotaria leclerci'
- 'Otaria oudriana is recombined as Mesotaria oudriana'
- 'Otaria weddellii is recombined as Leptonychotes weddelli'
- 'Otariina was reranked as the family Otariidae and belongs to Pinnipedia'
- 'Otoes is a subjective synonym of Otaria'
- 'Pachyacanthus belongs to Halicoridae'
- 'Pachyacanthus suessii is recombined as Eurhinodelphis suessi'
- 'Pachycetus belongs to Balaenopterinae'
- 'Pachycetus humilis belongs to Pachycetus'
- 'Pachycetus robustus belongs to Pachycetus'
- 'Pachyodon catulli [misspelled as Squalodon catulloi] belongs to Squalodon'
- 'Pagomys is a subjective synonym of Pusa'
- 'Pagophilus is replaced by Pagophoca'
- 'Pagophoca belongs to Phocidae'
- 'Palaeobalaena bergi is recombined as Balaena bergi'
- 'Palaeocetus belongs to Balaeninae'
- 'Palaeocetus sedgwicki belongs to Palaeocetus'
- 'Palaeodelphis annulatus is recombined as Physodon annulatus'
- 'Palaeodelphis arcuatus is recombined as Physodon arcuatus'
- 'Palaeodelphis coronatus is recombined as Physodon coronatus'
- 'Palaeodelphis fusiformis is recombined as Physodon fusiformis'
- 'Palaeodelphis grandis is recombined as Physodon grandis'
- 'Palaeodelphis minutus is recombined as Physodon minutus'
- 'Palaeodelphis pachyodon is recombined as Physodon pachyodon'
- 'Palaeodelphis zonatus is recombined as Physodon zonatus'
- 'Palaeophoca is a subjective synonym of Pristiphoca'
- 'Paleophoca nystii is recombined as Monachus (Pristiphoca) nysti'
- 'Paracetus mediatlanticus is recombined as Diaphorocetus mediatlanticus'
- 'Pelagius is a subjective synonym of Monachus'
- 'Pelycorhamphus belongs to Ziphiinae'
- 'Pelycorhamphus pertortus belongs to Pelycorhamphus'
- 'Phoca belongs to Phocinae'
- 'Phoca (Pusa) hispida gichigensis is recombined as Pusa hispida gichigensis'
- 'Phoca albiventer is recombined as Monachus (Monachus) albiventer'
- 'Phoca ambigua is recombined as Squalodon ambiguus'
- 'Arctocephalus antarcticus is a subjective synonym of Arctocephalus (Arctocephalus) pusillus'
- 'Phoca barbata is recombined as Phoca (Erignathus) barbatus'
- 'Phoca carcinophaga is recombined as Ogmorhinus (Lobodon) carcinophagus'
- 'Phoca caspica is recombined as Pusa hispida caspica'
- 'Phoca concolor belongs to Phoca' according to De Kay 1842
- 'Phoca concolor is recombined as Phoca vitulina concolor'
- 'Phoca cristata is recombined as Cystophora cristata'
- 'Phoca debilis is recombined as Squalodon debilis'
- 'Phoca fasciata is recombined as Phoca (Histriophoca) fasciata'
- 'Phoca gaudini is recombined as Monachus (Pristiphoca) gaudini'
- 'Phoca groenlandica is recombined as Pagophoca groenlandica'
- 'Phoca grypus is recombined as Halichoerus (Halichoerus) grypus'
- 'Phoca hispida is recombined as Pusa hispida'
- 'Phoca holitschensis belongs to Phoca' according to Bruhl 1860
- 'Phoca holitschensis belongs to Phoca'
- 'Phoca jubata is recombined as Eumetopias (Eumetopias) jubata'
- 'Phoca leonina is recombined as Macrorhinus leoninus'
- 'Phoca leptonyx is recombined as Ogmorhinus (Ogmorhinus) leptonyx'
- 'Phoca maeotica is recombined as Monatherium maeoticum'
- 'Phoca moori belongs to Phoca'
- 'Phoca ochotensis belongs to Phoca'
- 'Phoca ochotensis macrodens belongs to Phoca ochotensis'
- 'Phoca ochotensis macrodens belongs to Phoca ochotensis' according to Allen 1902
- 'Phoca pontica belongs to Phoca'
- 'Phoca pusilla is recombined as Arctocephalus (Arctocephalus) pusillus'
- 'Phoca richardii geronimensis is recombined as Phoca richardsi geronimensis' according to Allen 1902
- 'Phoca richardii geronimensis [misspelled as Phoca richardsi geronimensis] belongs to Phoca richardii'
- 'Phoca richardii pribilofensis [misspelled as Phoca richardsi pribilofensis] belongs to Phoca richardii'
- 'Phoca richardii pribilofensis is recombined as Phoca richardsi pribilofensis' according to Allen 1902
- 'Phoca rosmarus is recombined as Trichechus rosmarus'
- 'Phoca rugosidens is recombined as Monatherium rugosidens'
- 'Phoca stejnegeri belongs to Phoca' according to Allen 1902
- 'Phoca stejnegeri belongs to Phoca'
- 'Phoca stelleri is recombined as Eumetopias stelleri'
- 'Phoca tropicalis is recombined as Monachus (Monachus) tropicalis'
- 'Arctocephalus ursinus is a subjective synonym of Arctocephalus (Arctocephalus) pusillus'
- 'Phoca vindobonensis belongs to Phoca'
- 'Phoca vitulina belongs to Phoca'
- 'Phoca vitulina sibirica is recombined as Pusa hispida sibirica'
- 'Phoca vitulinoides belongs to Phoca'
- 'Phocadae is corrected as Phocidae and belongs to Pinnipedia'
- 'Phocaena belongs to Delphinidae'
- 'Acanthodelphis is a subjective synonym of Phocaena'
- 'Phocaena albiventris is recombined as Cephalorhynchus albiventris'
- 'Phocaena communis is a subjective synonym of Phocaena phocaena'
- 'Phocaena crassidens is recombined as Pseudorca crassidens'
- 'Phocaena euxinica is recombined as Champsodelphis euxinicus'
- 'Phocaena homei belongs to Phocaena' according to Smith 1828
- 'Phocaena homei is a subjective synonym of Lagenorhynchus obscurus'
- 'Phocaena philippi is a subjective synonym of Phocaena spinipennis'
- 'Phocaena posidonia belongs to Phocaena' according to Philippi 1893
- 'Phocaena posidonia is recombined as Lagenorhynchus posidonia'
- 'Phocaena spinipinnis [misspelled as Phocaena spinipennis] belongs to Phocaena'
- 'Phocaenopsis belongs to Delphinidae'
- 'Phocaenopsis cornutus belongs to Phocaenopsis'
- 'Phocaenopsis mantelli belongs to Phocaenopsis'
- 'Phocaenopsis scheynensis belongs to Phocaenopsis'
- 'Phocageneus venustus is recombined as Delphinodon venustus'
- 'Phocarctos belongs to Otariidae'
- 'Phocinae belongs to Phocidae'
- 'Phococetus belongs to Squalodontidae'
- 'Phocodon scillae is recombined as Squalodon scillae'
- 'Phocoena dalli is recombined as Phocaena dalli'
- 'Phocoena obtusata is recombined as Cephalorhynchus obtusata'
- 'Physeter belongs to Physeterinae'
- 'Physeter antiquus belongs to Physeter'
- 'Physeter bidens is recombined as Mesoplodon bidens'
- 'Physeter breviceps is recombined as Kogia breviceps'
- 'Physeter macrocephalus belongs to Physeter'
- 'Physeteridae belongs to Odontoceti'
- 'Physeterinae belongs to Physeteridae'
- 'Physeterula belongs to Physeterinae'
- 'Physeterula dubusii is corrected as Physeterula dubusi and belongs to Physeterula'
- 'Physodon belongs to Physeterinae'
- 'Physodon leccense [misspelled as Physodon leccensis] belongs to Physodon'
- 'Physodon lorteti belongs to Physodon'
- 'Physodon patagonicus belongs to Physodon'
- 'Physotherium belongs to Physeterinae'
- 'Physotherium sotterii [misspelled as Physotherium solterii] belongs to Physotherium'
- 'Pinnipedia belongs to Mammalia'
- 'Placoziphius belongs to Ziphiinae'
- 'Placoziphius duboisii [misspelled as Placoziphius duboisi] belongs to Placoziphius'
- 'Platanista belongs to Eurhinodelphinae'
- 'Platanista croatica belongs to Platanista'
- 'Platanistina was reranked as the family Platanistidae and belongs to Odontoceti'
- 'Platanistinae belongs to Platanistidae'
- 'Platydelphis is a subjective synonym of Cyrtodelphis'
- 'Platyphoca was reranked as Phoca (Platyphoca) and belongs to Phoca'
- 'Platyphoca vulgaris is recombined as Phoca (Platyphoca) vulgaris'
- 'Platyrhynchus is a subjective synonym of Otaria'
- 'Platyrhynchus is a subjective synonym of Cyrtodelphis'
- 'Plesiocetus belongs to Balaenopterinae'
- 'Plesiocetus brialmonti belongs to Plesiocetus'
- 'Plesiocetus burtinii is corrected as Plesiocetus burtini and belongs to Plesiocetus'
- 'Plesiocetus garopii is recombined as Balaenoptera goropii'
- 'Plesiocetus gervaisii is corrected as Plesiocetus gervaisi and belongs to Plesiocetus'
- 'Plesiocetus hupschii [misspelled as Plesiocetus hupschi] belongs to Plesiocetus'
- 'Plesiocetus portisi is recombined as Balaenoptera cuvieri portisi'
- 'Poecilophoca is a subjective synonym of Leptonychotes'
- 'Pontistes belongs to Platanistinae'
- 'Pontivaga belongs to Platanistinae'
- 'Pontivaga fischeri belongs to Pontivaga'
- 'Pontobasileus belongs to Basilosauridae'
- 'Pontobasileus tuberculatus belongs to Pontobasileus'
- 'Pontogeneus is a subjective synonym of Dorudon'
- 'Pontogeneus priscus is a subjective synonym of Dorudon serratus'
- 'Pontoplanodes belongs to Platanistinae'
- 'Pontoplanodes obliquus belongs to Pontoplanodes'
- 'Priscodelphinus belongs to Eurhinodelphinae'
- 'Priscodelphinus acutidens is recombined as Champsodelphis acutidens'
- 'Priscodelphinus atropius is recombined as Ixacanthus atropius'
- 'Priscodelphinus crassus is a subjective synonym of Eurhinodelphis cocheteuxi'
- 'Priscodelphinus cristatus is recombined as Eurhinodelphis cristatus'
- 'Priscodelphinus declivus is a subjective synonym of Eurhinodelphis cocheteuxi'
- 'Priscodelphinus elegans is a subjective synonym of Eurhinodelphis longirostris'
- 'Priscodelphinus grandaevus belongs to Priscodelphinus'
- 'Priscodelphinus harlani belongs to Priscodelphinus'
- 'Priscodelphinus morckhoviensis is a subjective synonym of Eurhinodelphis longirostris'
- 'Priscodelphinus productus is a subjective synonym of Eurhinodelphis cristatus'
- 'Priscodelphinus pulvinatus is a subjective synonym of Eurhinodelphis longirostris'
- 'Priscodelphinus robustus is a subjective synonym of Eurhinodelphis cocheteuxi'
- 'Priscodelphinus spinosus is recombined as Ixacanthus spinosus'
- 'Priscodelphinus squalodontoides is recombined as Eurhinodelphis squalodontoides'
- 'Priscodelphinus stenus is recombined as Ixacanthus stenus'
- 'Priscodelphinus teres is a subjective synonym of Eurhinodelphis cocheteuxi'
- 'Priscodelphinus validus is a subjective synonym of Eurhinodelphis cocheteuxi'
- 'Priscophyseter belongs to Physeterinae'
- 'Priscophyseter typus belongs to Priscophyseter'
- 'Pristinocetus is a subjective synonym of Archaeocetus'
- 'Pristiphoca was reranked as Monachus (Pristiphoca) and belongs to Monachus'
- 'Probalaena dubusii is recombined as Balaena dubusi'
- 'Prodelphinus belongs to Delphinidae'
- 'Prodelphinus gervaisi belongs to Prodelphinus'
- 'Prohalicore belongs to Halicoridae'
- 'Prohalicore dubaleni belongs to Prohalicore'
- 'Prophoca belongs to Phocinae'
- 'Prophoca proxima belongs to Prophoca'
- 'Prophoca rousseaui belongs to Prophoca'
- 'Prorastomidae belongs to Sirenia'
- 'Prorastomus belongs to Prorastomidae'
- 'Prorastomus sirenoides belongs to Prorastomus'
- 'Proroziphius chonops is recombined as Choneziphius chonops'
- 'Proroziphius macrops is recombined as Choneziphius macrops'
- 'Prosqualodon belongs to Squalodontidae'
- 'Prosqualodon australis belongs to Prosqualodon'
- 'Proterocetus belongs to Squalodontidae'
- 'Proterocetus palpabilis belongs to Proterocetus'
- 'Pseudorca belongs to Delphinidae'
- 'Pugmeodon schinzii is recombined as Halitherium schinzi'
- 'Pusa belongs to Phocinae'
- 'Pusa hispida saimensis belongs to Pusa hispida' according to Nordquist 1900
- 'Rhabdosteus belongs to Eurhinodelphinae'
- 'Rhabdosteus latiradix belongs to Rhabdosteus'
- 'Rhachianectes belongs to Balaenopterinae'
- 'Rhegnopsis belongs to Balaenopterinae'
- 'Rhinostodes belongs to Ziphiinae'
- 'Rhinostodes antwerpiensis belongs to Rhinostodes'
- 'Rhinostodes lovisatoi belongs to Rhinostodes'
- 'Rhizoprion bariensis is recombined as Squalodon bariensis'
- 'Rhytiodus capgrandi belongs to Rhytiodus'
- 'Ribodon belongs to Trichechidae'
- 'Ribodon limbatus belongs to Ribodon'
- 'Rosmarus is a subjective synonym of Trichechus'
- 'Rytiodus is corrected as Rhytiodus and belongs to Halicoridae'
- 'Sagmatias belongs to Delphinidae'
- 'Saurocetes argentinus is recombined as Pontoplanodes argentinus'
- 'Saurocetus belongs to Basilosauridae'
- 'Saurocetus gibbesii [misspelled as Saurocetus gibbesi] belongs to Saurocetus'
- 'Saurodelphis is a subjective synonym of Pontoplanodes'
- 'Scaldicetus belongs to Physeterinae'
- 'Scaldicetus antwerpiensis belongs to Scaldicetus'
- 'Scaldicetus caretti belongs to Scaldicetus'
- 'Schizodelphis belongs to Platanistinae'
- 'Schizodelphis compressus belongs to Schizodelphis'
- 'Schizodelphis depereti is a subjective synonym of Cyrtodelphis sulcatus'
- 'Schizodelphis elongatus belongs to Schizodelphis'
- 'Siphonocetus belongs to Balaenopterinae'
- 'Siphonocetus clarkianus belongs to Siphonocetus'
- 'Sotalia belongs to Delphinidae'
- 'Sotalia borneensis belongs to Sotalia'
- 'Sotalia brasiliensis belongs to Sotalia'
- 'Sotalia maculiventer belongs to Sotalia'
- 'Sotalia pallidus is recombined as Sotalia tucuxi pallidus'
- 'Sotalia perniger belongs to Sotalia'
- 'Sotalia santonicus belongs to Sotalia'
- 'Sotalia teuszii [misspelled as Sotalia teuszi] belongs to Sotalia'
- 'Sotalia tucuxi belongs to Sotalia'
- 'Squalodon belongs to Squalodontidae'
- 'Squalodon antverpiensis belongs to Squalodon'
- 'Squalodon bariensis bellunensis belongs to Squalodon bariensis'
- 'Squalodon ehrlichii [misspelled as Squalodon ehrlichi] belongs to Squalodon'
- 'Squalodon gastaldii [misspelled as Squalodon gastaldi] belongs to Squalodon'
- 'Squalodon gervaisii is corrected as Squalodon gervaisi and belongs to Squalodon'
- 'Squalodon grateloupii is corrected as Squalodon grateloupi and belongs to Squalodon'
- 'Squalodon hypsispondylus belongs to Squalodon'
- 'Squalodon incertus belongs to Squalodon'
- 'Squalodon mento is recombined as Delphinodon mento'
- 'Squalodon pelagius belongs to Squalodon'
- 'Squalodon quaternarium [misspelled as Squalodon quaternarius] belongs to Squalodon'
- 'Squalodon serratus belongs to Squalodon'
- 'Squalodon suessii is corrected as Squalodon suessi and belongs to Squalodon'
- 'Squalodon tiedemani is corrected as Squalodon tiedmanni and belongs to Squalodon'
- 'Squalodon vocontiorum belongs to Squalodon'
- 'Squalodon wilkinsoni [misspelled as Squalodon wilkensoni] belongs to Squalodon'
- 'Delphinodon wymani is a subjective synonym of Delphinodon leidyi'
- 'Squalodon zitteli belongs to Squalodon'
- 'Squalodontidae belongs to Odontoceti'
- 'Stemmatopus is a subjective synonym of Cystophora'
- 'Steno belongs to Delphinidae'
- 'Steno attenuatus is recombined as Prodelphinus attenuatus'
- 'Steno bellardii belongs to Steno'
- 'Steno consimilis belongs to Steno'
- 'Steno gastaldii belongs to Steno'
- 'Steno perspicillatus belongs to Steno'
- 'Stenodelphis belongs to Platanistinae'
- 'Stenorhynchus is a subjective synonym of Ogmorhinus'
- 'Lobodon vetus is a subjective synonym of Ogmorhinus (Lobodon) carcinophagus'
- 'Tretosphys uraeus is recombined as Priscodelphinus uraeus'
- 'Tretulias belongs to Balaenopterinae'
- 'Tretulias buccatus belongs to Tretulias'
- 'Trichechidae belongs to Pinnipedia'
- 'Trichechus belongs to Trichechidae'
- 'Trichechus belongs to Trichechidae'
- 'Trichechus dugon is recombined as Halicore dugong'
- 'Trichechus manatus belongs to Trichechus'
- 'Trichechus obesus is recombined as Trichecus obesus'
- 'Trichechus senegalensis belongs to Trichechus'
- 'Trichecidae is a misspelling of Trichechidae'
- 'Trichecodon is a subjective synonym of Trichechus'
- 'Trichecodon huxleyi is recombined as Trichechus huxleyi'
- 'Trichecodon koninckii is recombined as Trichechus konincki'
- 'Tursio is a subjective synonym of Lissodelphis'
- 'Tursio chiloensis belongs to Tursio' according to Philippi 1900
- 'Tursio chiloensis is recombined as Lissodelphis chiloensis'
- 'Tursio panope is recombined as Lissodelphis panope'
- 'Tursio platyrrhinus belongs to Tursio' according to Perez Canto 1896
- 'Tursio platyrrhinus is recombined as Cephalorhynchus platyrhinus'
- 'Tursiops truncatus is a subjective synonym of Tursiops tursio'
- 'Tursiops belongs to Delphinidae'
- 'Tursiops catalania belongs to Tursiops'
- 'Tursiops cortesii astensis belongs to Tursiops cortesii'
- 'Tursiops cymodoce is recombined as Tursiops tursio cymodoce'
- 'Tursiops erebennus is recombined as Tursiops tursio erebennus'
- 'Tursiops fergusoni belongs to Tursiops' according to Lydekker 1903
- 'Tursiops metis is recombined as Tursiops tursio metis'
- 'Tursiops miocaenus belongs to Tursiops'
- 'Tursiops parvimanus belongs to Tursiops'
- 'Tursiops tursio belongs to Tursiops'
- 'Ulias belongs to Balaenopterinae'
- 'Ulias moratus belongs to Ulias'
- 'Zalophus was reranked as Eumetopias (Zalophus) and belongs to Eumetopias'
- 'Zarhachis belongs to Eurhinodelphinae'
- 'Zarhachis flagellator belongs to Zarhachis'
- 'Zarhachis tysonii [misspelled as Zarhachis tysoni] belongs to Zarhachis'
- 'Zarhachis velox belongs to Zarhachis'
- 'Zeuglodon is a subjective synonym of Basilosaurus'
- 'Zeuglodon brachyspondylus is recombined as Basilosaurus brachyspondylus'
- 'Zeuglodon caucasicus is recombined as Basilosaurus caucasicus'
- 'Zeuglodon cetoides is recombined as Basilosaurus cetoides'
- 'Zeuglodon harwoodii is recombined as Basilosaurus harwoodi'
- 'Zeuglodon osiris is recombined as Basilosaurus osiris'
- 'Zeuglodon paulsonii is recombined as Basilosaurus paulsoni'
- 'Zeuglodon puschii is recombined as Basilosaurus puschi'
- 'Zeuglodon pygmaeus is recombined as Agorophius pygmaeus'
- 'Zeuglodon vasconum is recombined as Phococetus vasconum'
- 'Zeuglodon vredense is recombined as Basilosaurus vredensis'
- 'Zeuglodon wanklyni is recombined as Basilosaurus wanklyni'
- 'Zeuglodonta belongs to Cetacea'
- 'Ziphiinae belongs to Physeteridae'
- 'Ziphioides belongs to Ziphiinae'
- 'Ziphioides obliquus belongs to Ziphioides'
- 'Ziphioides triangulus belongs to Ziphioides'
- 'Ziphiopsis belongs to Ziphiinae'
- 'Ziphiopsis phymatodes belongs to Ziphiopsis'
- 'Ziphiopsis servatus belongs to Ziphiopsis'
- 'Ziphiorrhynchus australis is recombined as Ziphius australis'
- 'Ziphirostrum belongs to Ziphiinae'
- 'Ziphirostrum gracile belongs to Ziphirostrum'
- 'Ziphirostrum laevigatum belongs to Ziphirostrum'
- 'Ziphirostrum marginatum belongs to Ziphirostrum'
- 'Ziphirostrum tumidum belongs to Ziphirostrum'
- 'Ziphirostrum turninense belongs to Ziphirostrum'
- 'Ziphius belongs to Ziphiinae'
- 'Ziphius angulatus is recombined as Mesoplodon angulatus'
- 'Ziphius angustus is recombined as Mesoplodon angustus'
- 'Ziphius blasii is recombined as Mesoplodon blasiusi'
- 'Ziphius cavirostris belongs to Ziphius'
- 'Ziphius cuvieri is recombined as Choneziphius planirostris cuvieri'
- 'Ziphius gibbus is recombined as Mesoplodon gibbus'
- 'Ziphius grebnitzkii [misspelled as Ziphius grebnitzki] belongs to Ziphius'
- 'Ziphius layardii is recombined as Mesoplodon layardi'
- 'Ziphius longirostris is recombined as Mesoplodon longirostris'
- 'Ziphius medilineatus is recombined as Mesoplodon medilineatus'
- 'Ziphius planirostris is recombined as Choneziphius planirostris'
- 'Ziphius planus is recombined as Choneziphius planus'
- 'Ziphius priscus is recombined as Cetotherium priscum'
- 'Ziphius tenuirostris is recombined as Mesoplodon tenuirostris'