Opinions from R. M. Nowak 1991
- 'Abrocomidae belongs to Rodentia'
- 'Acrobatidae belongs to Diprotodontia'
- 'Agoutidae belongs to Rodentia'
- 'Anomaluridae belongs to Rodentia'
- 'Antilocapridae belongs to Artiodactyla'
- 'Aplodontidae belongs to Rodentia'
- 'Artiodactyla belongs to Eutheria'
- 'Balaenopteridae belongs to Cetacea'
- 'Balanadae is corrected as Balaenidae and belongs to Cetacea'
- 'Bathyergidae belongs to Rodentia'
- 'Bovidae belongs to Artiodactyla'
- 'Bradypidae is corrected as Bradypodidae and belongs to Xenarthra'
- 'Burramyidae belongs to Diprotodontia'
- 'Caenolestidae belongs to Paucituberculata'
- 'Callitrichidae belongs to Primates'
- 'Camelidae belongs to Artiodactyla'
- 'Canidae belongs to Carnivora'
- 'Capromyidae belongs to Rodentia'
- 'Carnivora belongs to Eutheria'
- 'Castoridae belongs to Rodentia'
- 'Caviidae belongs to Rodentia'
- 'Cebidae belongs to Primates'
- 'Cercopithecidae belongs to Primates'
- 'Cervidae belongs to Artiodactyla'
- 'Cetacea belongs to Eutheria'
- 'Cheirogaleidae belongs to Primates'
- 'Chinchillidae belongs to Rodentia'
- 'Chiroptera belongs to Eutheria'
- 'Chrysochloridae belongs to Insectivora'
- 'Craseonycteridae belongs to Chiroptera'
- 'Ctenomyidae belongs to Rodentia'
- 'Cynocephalidae belongs to Dermoptera'
- 'Dasipidae is corrected as Dasypodidae and belongs to Xenarthra'
- 'Dasyproctidae belongs to Rodentia'
- 'Dasyuridae belongs to Dasyuromorphia'
- 'Dasyuromorphia belongs to Metatheria'
- 'Daubentoniidae belongs to Primates'
- 'Delphinidae belongs to Cetacea'
- 'Dendrohyrax belongs to Procaviidae'
- 'Dendrohyrax (Heterohyrax) was reranked as Heterohyrax and belongs to Procaviidae'
- 'Dermoptera belongs to Eutheria'
- 'Didelphidae belongs to Didelphoidea'
- 'Didelphoidea belongs to Metatheria'
- 'Dinomyidae belongs to Rodentia'
- 'Dipodidae belongs to Rodentia'
- 'Diprotodontia belongs to Metatheria'
- 'Dugongidae belongs to Sirenia'
- 'Echimyidae belongs to Rodentia'
- 'Elephantidae belongs to Proboscidea'
- 'Emballonuridae belongs to Chiroptera'
- 'Equidae belongs to Perissodactyla'
- 'Erethizontidae belongs to Rodentia'
- 'Erinaceidae belongs to Insectivora'
- 'Felidae belongs to Carnivora'
- 'Furipteridae belongs to Chiroptera'
- 'Galagidae is corrected as Galagonidae and belongs to Primates'
- 'Geomyidae belongs to Rodentia'
- 'Giraffidae belongs to Artiodactyla'
- 'Herpestinae was reranked as the family Herpestidae and belongs to Carnivora'
- 'Heteromyidae belongs to Rodentia'
- 'Hippopotamidae belongs to Artiodactyla'
- 'Hominidae belongs to Primates'
- 'Hyaenidae belongs to Carnivora'
- 'Hydrochoeridae [misspelled as Hydrochaeridae] belongs to Rodentia'
- 'Hylobatidae belongs to Primates'
- 'Hyracoidea belongs to Eutheria'
- 'Hystricidae belongs to Rodentia'
- 'Indridae belongs to Primates'
- 'Insectivora belongs to Eutheria'
- 'Lagomorpha belongs to Eutheria'
- 'Lemuridae belongs to Primates'
- 'Leporidae belongs to Lagomorpha'
- 'Loridae belongs to Primates'
- 'Macropidae is corrected as Macropodidae and belongs to Diprotodontia'
- 'Macroscelidea belongs to Eutheria'
- 'Macroscelididae belongs to Macroscelidea'
- 'Manidae belongs to Pholidota'
- 'Megadermatidae belongs to Chiroptera'
- 'Megaladapidae belongs to Primates'
- 'Megalonychidae belongs to Xenarthra'
- 'Microbiotheria belongs to Metatheria'
- 'Microbiotheridae is corrected as Microbiotheriidae and belongs to Microbiotheria'
- 'Molossidae belongs to Chiroptera'
- 'Monodontidae belongs to Cetacea'
- 'Monotremata belongs to Prototheria'
- 'Mormoopidae belongs to Chiroptera'
- 'Moschidae belongs to Artiodactyla'
- 'Muridae belongs to Rodentia'
- 'Mustelidae belongs to Carnivora'
- 'Myocastorinae was reranked as the family Myocastoridae and belongs to Rodentia'
- 'Myrmecobiidae belongs to Dasyuromorphia'
- 'Myrmecophagidae belongs to Xenarthra'
- 'Mystacinidae belongs to Chiroptera'
- 'Myzopodidae belongs to Chiroptera'
- 'Natalidae belongs to Chiroptera'
- 'Neobalaenidae [misspelled as Neoballaenidae] belongs to Cetacea'
- 'Noctilionidae belongs to Chiroptera'
- 'Notoryctemorphia belongs to Metatheria'
- 'Notoryctidae belongs to Notoryctemorphia'
- 'Nycteridae belongs to Chiroptera'
- 'Ochotonidae belongs to Lagomorpha'
- 'Octodontidae belongs to Rodentia'
- 'Odobaenidae is corrected as Odobenidae and belongs to Pinnipedia'
- 'Ornithorhynchidae belongs to Monotremata'
- 'Orycteropodidae belongs to Tubulidentata'
- 'Otariina was reranked as the family Otariidae and belongs to Pinnipedia'
- 'Paradoxurina is corrected as Paradoxurinae and belongs to Viverridae'
- 'Paucituberculata belongs to Metatheria'
- 'Pedetidae belongs to Rodentia'
- 'Peramelidae belongs to Peramelina'
- 'Peramelina belongs to Metatheria'
- 'Perissodactyla was reranked as a order and belongs to Eutheria'
- 'Peroryctidae belongs to Peramelina'
- 'Petauridae belongs to Diprotodontia'
- 'Petromuridae belongs to Rodentia'
- 'Phalangeridae belongs to Diprotodontia'
- 'Phascolarctidae belongs to Diprotodontia'
- 'Phocadae is corrected as Phocidae and belongs to Pinnipedia'
- 'Phocaenina was reranked as the family Phocoenidae and belongs to Cetacea'
- 'Pholidota belongs to Eutheria'
- 'Phyllostomidae belongs to Chiroptera'
- 'Physeteridae belongs to Cetacea'
- 'Pinnipedia belongs to Eutheria'
- 'Platanistina was reranked as the family Platanistidae and belongs to Cetacea'
- 'Potoridae is corrected as Potoroidae and belongs to Diprotodontia'
- 'Primates belongs to Eutheria'
- 'Proboscidea belongs to Eutheria'
- 'Procavia belongs to Procaviidae'
- 'Procaviidae belongs to Hyracoidea'
- 'Procyonidae belongs to Carnivora'
- 'Pseudocheiridae belongs to Diprotodontia'
- 'Pteropodidae belongs to Chiroptera'
- 'Rhinocerotidae belongs to Perissodactyla'
- 'Rhinolophidae belongs to Chiroptera'
- 'Rhinopomatidae belongs to Chiroptera'
- 'Rodentia belongs to Eutheria'
- 'Scandentia belongs to Eutheria'
- 'Sciuridae belongs to Rodentia'
- 'Sirenia belongs to Eutheria'
- 'Solenodontidae belongs to Insectivora'
- 'Soricidae belongs to Insectivora'
- 'Suidae belongs to Artiodactyla'
- 'Tachyglossidae belongs to Monotremata'
- 'Talpini was reranked as the family Talpidae and belongs to Insectivora'
- 'Taperidae is corrected as Tapiridae and belongs to Perissodactyla'
- 'Tarsiidae belongs to Primates'
- 'Tarsipedidae belongs to Diprotodontia'
- 'Tayassuidae belongs to Artiodactyla'
- 'Tenrecidae belongs to Insectivora'
- 'Thryonomyidae belongs to Rodentia'
- 'Thylacinidae belongs to Dasyuromorphia'
- 'Thylacomyinae is corrected as Thylacomyidae and belongs to Peramelina'
- 'Thyropteridae belongs to Chiroptera'
- 'Tragulidae belongs to Artiodactyla'
- 'Trichecidae is corrected as Trichechidae and belongs to Sirenia'
- 'Tubulidentata belongs to Eutheria'
- 'Tupaiidae belongs to Scandentia'
- 'Ursidae belongs to Carnivora'
- 'Vespertilionidae belongs to Chiroptera'
- 'Viverridae belongs to Carnivora'
- 'Vombatidae belongs to Diprotodontia'
- 'Xenarthra was reranked as a order and belongs to Eutheria'
- 'Ziphiidae was reranked as the tribe Ziphiina and belongs to Cetacea'