| Pinnipedia | Phocoidea | Phocidae | Devinophocinae †Devinophoca spp. |
| Pinnipedia | Phocoidea | Phocidae | Monachinae †Magnotherium johnsii |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Monachini †Afrophoca libyca |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Monachini †Auroraphoca atlantica |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Monachini †Noriphoca gaudini |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Monachini †Pliophoca etrusca |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Monachini †Pontophoca spp. |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Monachini Monachus monachus Mediterranean monk seal |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Monachini †Neomonachus tropicalis Caribbean monk seal |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Monachini Neomonachus schauinslandi Hawaiian monk seal |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Miroungini †Callophoca obscura |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Miroungini Mirounga angustirostris northern elephant seal |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Miroungini Mirounga leonina southern elephant seal |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Lobodontini †Acrophoca longirostris |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Lobodontini †Hadrokirus spp. |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Lobodontini †Homiphoca spp. |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Lobodontini †Piscophoca pacifica |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Lobodontini Ommatophoca rossii Ross seal |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Lobodontini Lobodon carcinophaga crabeater seal |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Lobodontini Hydrurga leptonyx leopard seal |
| Pinnipedia | Phocoidea | Phocidae | Monachinae | Lobodontini Leptonychotes weddellii Weddell seal |
| Pinnipedia | Phocoidea | Phocidae | Phocinae †Frisiphoca spp. |
| Pinnipedia | Phocoidea | Phocidae | Phocinae †Kawas benegasorum |
| Pinnipedia | Phocoidea | Phocidae | Phocinae †Leptophoca spp. |
| Pinnipedia | Phocoidea | Phocidae | Phocinae †Monotherium spp. |
| Pinnipedia | Phocoidea | Phocidae | Phocinae †Phocanella pumila |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Erignathini †Platyphoca spp. |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Erignathini Erignathus barbatus bearded seal |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Cystophorini †Pachyphoca spp. |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Cystophorini Cystophora cristata hooded seal |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini †Gryphoca spp. |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini †Nanophoca vitulinoides |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini †Praepusa spp. |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini Pagophilus groenlandicus harp seal |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini Histriophoca fasciata ribbon seal |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini Halichoerus grypus grey seal |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini Phoca vitulina common seal, harbour seal |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini Phoca largha spotted seal |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini Pusa caspica Caspian seal |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini Pusa hispida ringed seal |
| Pinnipedia | Phocoidea | Phocidae | Phocinae | Phocini Pusa sibirica Baikal seal |
| Pinnipedia | Otarioidea | Desmatophocidae | Allodesminae †Allodesmus spp. |
| Pinnipedia | Otarioidea | Desmatophocidae | Allodesminae †Atopotarus spp. |
| Pinnipedia | Otarioidea | Desmatophocidae | Desmatophocinae †Desmatophoca spp. |
| Pinnipedia | Otarioidea | Odobenidae †Prototaria spp. |
| Pinnipedia | Otarioidea | Odobenidae †Proneotherium repenningi |
| Pinnipedia | Otarioidea | Odobenidae †Pseudotaria muramotoi |
| Pinnipedia | Otarioidea | Odobenidae †Archaeodobenus akamatsui |
| Pinnipedia | Otarioidea | Odobenidae †Imagotaria downsi |
| Pinnipedia | Otarioidea | Odobenidae †Kamtschatarctos sinelnikovae |
| Pinnipedia | Otarioidea | Odobenidae †Nanodobenus arandai |
| Pinnipedia | Otarioidea | Odobenidae †Neotherium mirum |
| Pinnipedia | Otarioidea | Odobenidae †Osodobenus eodon |
| Pinnipedia | Otarioidea | Odobenidae †Pelagiarctos thomasi |
| Pinnipedia | Otarioidea | Odobenidae †Pontolis spp. |
| Pinnipedia | Otarioidea | Odobenidae †Titanotaria orangensis |
| Pinnipedia | Otarioidea | Odobenidae | Neodobenia | Dusignathinae †Dusignathus spp. |
| Pinnipedia | Otarioidea | Odobenidae | Neodobenia | Dusignathinae †Gomphotaria pugnax |
| Pinnipedia | Otarioidea | Odobenidae | Neodobenia | Odobeninae †Aivukus cedrosensis |
| Pinnipedia | Otarioidea | Odobenidae | Neodobenia | Odobeninae †Ontocetus emmonsi |
| Pinnipedia | Otarioidea | Odobenidae | Neodobenia | Odobeninae †Pliopedia pacifica |
| Pinnipedia | Otarioidea | Odobenidae | Neodobenia | Odobeninae †Valenictus spp. |
| Pinnipedia | Otarioidea | Odobenidae | Neodobenia | Odobeninae †Odobenus mandanoensis |
| Pinnipedia | Otarioidea | Odobenidae | Neodobenia | Odobeninae Odobenus rosmarus walrus |
| Pinnipedia | Otarioidea | Panotariidae †Eotaria spp. |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Callorhinae †Pithanotaria starri |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Callorhinae †Callorhinus inouei |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Callorhinae †Callorhinus macnallyae |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Callorhinae †Callorhinus gilmorei |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Callorhinae Callorhinus ursinus northern fur seal |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae †Thalassoleon spp. |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Zalophini †Oriensarctos watasei |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Zalophini †Proterozetes ulysses |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Zalophini Eumetopias jubatus Steller sea lion |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Zalophini Zalophus californianus California sea lion |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Zalophini †Zalophus japonicus Japanese sea lion |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Zalophini Zalophus wollebaeki Galápagos sea lion |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Otariini †Hydrarctos lomasiensis |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Otariini †Otaria fischeri |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Otariini Otaria flavescens South American sea lion |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Otariini †Neophoca palatina Pleistocene New Zealand sea lion |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Otariini Neophoca cinerea Australian sea lion |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Otariini Phocarctos hookeri New Zealand sea lion |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Arctocephalini Arctocephalus pusillus brown fur seal |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Arctocephalini Arctocephalus tropicalis subantarctic fur seal |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Arctocephalini Arctocephalus gazella Antarctic fur seal |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Arctocephalini Arctocephalus townsendi Guadalupe fur seal |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Arctocephalini Arctocephalus philippii Juan Fernández fur seal |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Arctocephalini Arctocephalus forsteri New Zealand fur seal |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Arctocephalini Arctocephalus galapagoensis Galápagos fur seal |
| Pinnipedia | Otarioidea | Panotariidae | Otariidae | Otariinae | Arctocephalini Arctocephalus australis South American fur seal |