(Enaliarctos_emlongi,(Pteronarctos_goedertae,(Proneotherium_repenningi,(Neotherium_mirum,(Pelagiarctos_spp,(Imagotaria_downsi,(Odobenus_rosmarus,((Allodesmus_kernensis,(Desmatophoca_oregonensis,(Monachus_monachus,Erignathus_barbatus))),(Thalassoleon_mexicanus,(Pithanotaria_starri,(Thalassoleon_inouei,(Thalassoleon_macnallyae,(Callorhinus_gilmorei,(Callorhinus_ursinus,(Eotaria_crypta,(Arctocephalus_australis,(Zalophus_californianus,(Otaria_byronia,(Proterozetes_ulysses,Eumetopias_jubatus)))))))))))))))))));