Opinions from L. G. Barnes 1989
- 'Aivukus belongs to Odobeninae'
- 'Alachtherium belongs to Odobeninae'
- 'Allodesmidae was reranked as the family Allodesminae and belongs to Otariidae'
- 'Allodesmus belongs to Allodesminae'
- 'Allodesmus kelloggi is a subjective synonym of Allodesmus kernensis'
- 'Allodesmus kernensis belongs to Allodesmus'
- 'Allodesmus packardi belongs to Allodesmus'
- 'Arctocephalus belongs to Otariinae'
- 'Arctocephalus (Hydrarctos) lomasiensis belongs to Arctocephalus (Hydrarctos)' according to C. Muizon 1978
- 'Arctoidea belongs to Carnivora'
- 'Atopotarus is a subjective synonym of Allodesmus'
- 'Atopotarus courseni is recombined as Allodesmus courseni'
- 'Callorhinus belongs to Otariinae'
- 'Callorhinus gilmorei belongs to Callorhinus'
- 'Carnivora belongs to Mammalia'
- 'Castorocauda belongs to Kamtschararctinae' according to I. Dubrovo 1981
- 'Desmatophoca belongs to Desmatophocinae'
- 'Desmatophoca brachycephala belongs to Desmatophoca'
- 'Desmatophoca oregonensis belongs to Desmatophoca'
- 'Desmatophocinae belongs to Otariidae'
- 'Dusignathinae belongs to Otariidae'
- 'Dusignathus belongs to Dusignathinae'
- 'Dusignathus santacruzensis belongs to Dusignathus'
- 'Enaliarctinae belongs to Otariidae'
- 'Enaliarctos belongs to Enaliarctinae'
- 'Enaliarctos mealsi belongs to Enaliarctos'
- 'Enaliarctos mitchelli belongs to Enaliarctos'
- 'Eumetopias belongs to Otariinae'
- 'Imagotaria belongs to Imagotariinae'
- 'Imagotariinae belongs to Otariidae'
- 'Kamtschararctinae is a subjective synonym of Imagotariinae'
- 'Kamtschatarctinae is a subjective synonym of Imagotariinae'
- 'Neophoca belongs to Otariinae'
- 'Neotherium belongs to Imagotariinae'
- 'Odobeninae belongs to Otariidae'
- 'Odobenus belongs to Odobeninae'
- 'Oriensarctos belongs to Otariidae'
- 'Otaria belongs to Otariinae'
- 'Otariina was reranked as the family Otariidae and belongs to Ursida'
- 'Otariinae belongs to Otariidae'
- 'Pelagiarctos belongs to Imagotariinae'
- 'Pelagiarctos thomasi belongs to Pelagiarctos'
- 'Phocarctos belongs to Otariinae'
- 'Pinnarctidion belongs to Enaliarctinae'
- 'Pithanotaria belongs to Otariinae'
- 'Pithanotaria starri belongs to Pithanotaria'
- 'Pliopedia belongs to Dusignathinae'
- 'Pontolis belongs to Imagotariinae'
- 'Prorosmarus belongs to Odobeninae'
- 'Prototaria is a subjective synonym of Neotherium'
- 'Prototaria primigena is recombined as Neotherium primigenum'
- 'Pteronarctos belongs to Enaliarctinae'
- 'Pteronarctos goedertae belongs to Pteronarctos'
- 'Thalassoleon belongs to Otariinae'
- 'Thalassoleon macnallyae belongs to Thalassoleon' according to C. Repenning and R. Tedford 1977
- 'Thalassoleon mexicanus belongs to Thalassoleon'
- 'Trichecodon belongs to Odobeninae'
- 'Trichecodon huxleyi belongs to Trichecodon'
- 'Trichecodon koninckii belongs to Trichecodon' according to Van Beneden 1877
- 'Ursida belongs to Arctoidea'
- 'Valenictus [misspelled as Valenictis] belongs to Dusignathinae'
- 'Valenictus imperialensis belongs to Valenictus'
- 'Zalophus belongs to Otariinae'