(Potamotherium_valletoni,(Enaliarctos_emlongi,(Pteronarctos_goedertae,Pithanotaria_starri,Callorhinus_ursinus,Desmatophoca_oregonensis,Allodesmus_kernensis,Erignathus_barbatus,Monachus_monachus,Mirounga_angustirostris,Prototaria_primigena,Prototaria_planicephala,Proneotherium_repenningi,Neotherium_mirum,Kamtschatarctos_sinelnikovae,Pseudotaria_muramotoi,Imagotaria_downsi,Pelagiarctos_spp,Pontolis_magnus,Archaeodobenus_akamatsui,LACM_135920,UABCFCM0072,(Dusignathus_santacruzensis,Dusignathus_seftoni,Gomphotaria_pugnax,(Aivukus_cedrosensis,Protodobenus_japonicus,Ontocetus_emmonsi,(Valenictus_chulavistensis,Odobenus_rosmarus))))));