Opinions from J.-R. Boisserie et al. 2005
- 'Anthracokeryx belongs to Anthracotheriinae'
- 'Anthracotheriidae belongs to Anthracotheriodea'
- 'Anthracotheriinae belongs to Anthracotheriidae'
- 'Anthracotheriodea belongs to Whippomorpha'
- 'Anthracotherium belongs to Anthracotheriinae'
- 'Archaeopotamus belongs to Hippopotaminae'
- 'Artiodactyla is an invalid subgroup of Cetartiodactyla'
- 'Bothriodontinae belongs to Anthracotheriidae'
- 'Brachyodus belongs to Bothriodontinae'
- 'Catagonus belongs to Tayassuinae'
- 'Cebochoerus belongs to Dichobunoidea'
- 'Cetacea belongs to Whippomorpha'
- 'Choeropsis belongs to Hippopotaminae'
- 'Diacodexis belongs to Dichobunoidea'
- 'Dichobunoidea belongs to Cetartiodactyla'
- 'Doliochoerus belongs to Doliochoerinae'
- 'Elomeryx belongs to Bothriodontinae'
- 'Entelodontidae belongs to Entelodontoidea'
- 'Entelodontoidea belongs to Cetartiodactyla'
- 'Hexaprotodon belongs to Hippopotaminae'
- 'Hippopotamidae belongs to Anthracotheriodea'
- 'Hippopotaminae belongs to Hippopotamidae'
- 'Hippopotamus belongs to Hippopotaminae'
- 'Kenyapotaminae belongs to Hippopotamidae'
- 'Kenyapotamus belongs to Kenyapotaminae'
- 'Libycosaurus belongs to Bothriodontinae'
- 'Merycopotamus belongs to Bothriodontinae'
- 'Microbunodon belongs to Anthracotheriinae'
- 'Pakicetinae was reranked as the family Pakicetidae and belongs to Cetacea'
- 'Pecari belongs to Tayassuinae'
- 'Perchoerus belongs to Tayassuinae'
- 'Ruminantia belongs to Cetartiodactyla'
- 'Saotherium belongs to Hippopotaminae'
- 'Siamotherium belongs to Anthracotheriinae'
- 'Suidae belongs to Suoidea'
- 'Suoidea belongs to Cetartiodactyla'
- 'Tayassu belongs to Tayassuinae'
- 'Tayassuidae belongs to Suoidea'
- 'Tayassuinae belongs to Tayassuidae'
- 'Whippomorpha belongs to Cetartiodactyla'
- 'Xenohyus belongs to Suoidea'