- Abrocomidae -- Chinchilla rats
- Acrobatidae -- Feather-tail gliders, Pygmy gliders, Feathertail gliders and pygmy gliders, Feathertail gliders pygmy gliders
- Agoutidae -- Pacas
- Ailuropodidae
- Anomaluridae -- Scaly-tailed Squirrels
- Antilocapridae -- Pronghorn antelopes, Pronghorn
- Aplodontidae -- Mountain beavers, Mountain Beaver
- Aplodontiidae
- Balaenidae -- Right whales, Rorquals, Right Whales
- Balaenopteridae -- Finner whales, Rorqual whales
- Bathyergidae -- Mole rats, Blesmoles
- Bovidae -- Antelopes, Cattle, Gazelles, Goats, Sheep, Buffaloes, Bulls, Cows
- Bradypodidae -- Three-toed sloths
- Burramyidae -- Pygmy possums
- Caenolestidae -- Shrew opossums
- Callimiconidae
- Callithricidae
- Callitrichidae -- Marmosets, Tamarins
- Camelidae -- Camels, Llamas
- Canidae -- Coyotes, Dogs, Foxes, Jackals, Wolves
- Capromyidae -- West Indian hutias, West indian hutias
- Castoridae -- Beavers
- Caviidae -- Cavies
- Cebidae -- New world monkeys
- Cercopithecidae -- Old world monkeys, Old-world monkeys
- Cervidae -- Deer, Elk, Moose, Caribou
- Cheirogaleidae -- Dwarf lemurs, Mouse lemurs
- Chinchillidae -- Chinchillas, Viscachas
- Chrysochloridae -- Golden moles
- Craseonycteridae -- Bumblebee bat, Hog-nosed bat
- Cricetidae
- Ctenodactylidae -- Gundis
- Ctenomyidae -- Tucu-tucus, Tuco-tucos
- Cynocephalidae -- Flying Lemurs, Colugos
- Dasypodidae -- Armadillos
- Dasyproctidae -- Agoutis, Acuchis
- Dasyuridae -- Dasyurids, Marsupial mice, Marsupial cats, Tasmanian devil
- Daubentoniidae -- Aye-ayes
- Delphinidae -- Dolphins, Killer whales, Pilot whales, And relatives
- Didelphidae -- Opossums, American opossums, American opossums and opossums, American opossums opossums
- Dinomyidae -- Giant rats, Pacarana
- Dipodidae -- Birch mice, Jerboas, Jumping mice
- Dugongidae -- Dugong, Sea cow, Dugongs, Dugong and sea cow
- Echimyidae -- Spiny rats
- Elephantidae -- Elephants
- Emballonuridae -- Sac-winged bats, Sheath-tailed bats
- Equidae -- Horses, Asses, Zebras
- Erethizontidae -- New world porcupines, Porcupine
- Erinaceidae -- Hedgehogs, Gymnures
- Eschrichtiidae -- Gray whales, Gray Whale, Grey whale
- Felidae -- Cats, Lions, Cheetahs
- Furipteridae -- Smoky bats, Thumbless bats
- Galagidae
- Galagonidae -- Galagos, Bushbabies
| - Geomyidae -- Pocket gophers, Gophers
- Giraffidae -- Giraffes, Okapis
- Gliridae
- Heptaxodontidae -- Giant hutias
- Herpestidae -- Mongooses
- Heteromyidae -- Kangaroo rats, Pocket mice
- Hippopotamidae -- Hippopotamuses, Hippos
- Hominidae -- Humans, Great apes
- Hyaenidae -- Aardwolves, Hyenas
- Hydrochaeridae -- Capybara
- Hydrochoeridae
- Hylobatidae -- Gibbons, Lesser apes
- Hystricidae -- Old world porcupines
- Indridae -- Indris, Sifakas
- Indriidae
- Iniidae
- Kogiidae
- Laonastidae
- Lemuridae -- True lemurs
- Leporidae -- Hares, Rabbits, Jackrabbits, Cottontails
- Lipotidae
- Loridae -- Lorises
- Lorisidae
- Macropodidae -- Kangaroos, Wallabies, Kangaroos, wallabies, and pademelons, Pademelons
- Macroscelididae -- Elephant shrews
- Manidae -- Pangolins
- Megadermatidae -- False vampire bats
- Megaladapidae -- Giant lemurs, Sportive lemurs
- Megalonychidae -- Megalonychid sloths, Two-toed sloths
- Mephitidae -- Skunks
- Microbiotheriidae -- Monito del monte
- Molossidae -- Free-tailed bats, Mastiff bats
- Monodontidae -- Belugas, Narwhals, Beluga and narwhal
- Mormoopidae -- Ghost-faced bat, Moustached bats, Naked-backed bats
- Moschidae -- Musk deer
- Muridae -- Mice, Rats, Voles, Rats voles, Wood rats, Lemmings
- Mustelidae -- Badgers, Otters, Skunks, Weasels, Badgers, Otters, Minks & Weasels, And relatives
- Myocastoridae -- Coypus, Nutria
- Myoxidae -- Dormice, Hazel mice
- Myrmecobiidae -- Numbats, Numbat
- Myrmecophagidae -- Anteaters
- Mystacinidae -- New Zealand short-tailed bats
- Myzopodidae -- Old World sucker-footed bat
- Natalidae -- Funnel eared bats
- Neobalaenidae -- Pygmy right whale
- Nesophontidae -- Nesophontid insectivores, Extinct West Indian shrews
- Noctilionidae -- Bull-dog bats, Mastiff bats
- Notoryctidae -- Marsupial moles, Marsupials moles
- Nycteridae -- Slit-faced bats, Hollow-faced bats
- Ochotonidae -- Pikas
- Octodontidae -- Degus, Rock rats, Viscacha rats
- Odobenidae -- Walruses, Walrus
- Ornithorhynchidae -- Platypus, Duck-billed platypus
- Orycteropodidae -- Aardvarks
| - Otariidae -- Fur seals, Sea lions, Eared Seals, Fur seals and sea lions
- Pedetidae -- Springhares, Springhaas
- Peramelidae -- Australian bandicoots, Australian Bandicoots
- Peroryctidae -- New Guinea bandicoots, Rainforest bandicoots, New guinea bandicoots
- Petauridae -- Gliders, Leadbeaters possum, Striped possums, Leadbeaters, Gliders, Possums
- Petromuridae -- Dassie rat
- Petromyidae
- Phalangeridae -- Brushtail possums, Cuscuses, Brushtail possums and cuscuses, Brushtail possums cuscuses
- Phascolarctidae -- Koalas
- Phocidae -- Seals, Hair Seals, True seals
- Phocoenidae -- Porpoises
- Phyllostomatidae
- Phyllostomidae -- New World leaf-nosed bats, New world leaf-nosed bats
- Physeteridae -- Sperm whales, Sperm Whales
- Pitheciidae
- Platacanthomyidae
- Platanistidae -- River dolphins
- Pongidae
- Potoroidae -- Rat-kangaroos, Bettongs, Potoroos, Bettongs, potoroos, and rat kangaroos, Rat kangaroos
- Procaviidae -- Hyraxes, Dassies, Conies
- Procyonidae -- Cacomistles, Coatis, Raccoons, Ringtails
- Pseudocheiridae -- Ringtailed possums
- Pteropodidae -- Old world fruit-eating bats, Flying foxes
- Rhinocerotidae -- Rhinoceroses
- Rhinolophidae -- Horseshoe bats, Old World leaf-nosed bats
- Rhinopomatidae -- Long-tailed bats, Mouse-tailed bats
- Rhizomyidae
- Sciuridae -- Squirrels, Chipmunks, Prairie-dogs
- Seleviniidae
- Solenodontidae -- Solenodons, Almiquis
- Soricidae -- Shrews
- Spalacidae
- Suidae -- Hogs, Pigs
- Tachyglossidae -- Echidnas, Spiny anteaters
- Talpidae -- Moles, Desmans, Shrew moles
- Tapiridae -- Tapirs
- Tarsiidae -- Tarsiers
- Tarsipedidae -- Honey possums, Honey possum
- Tayassuidae -- Peccaries
- Tenrecidae -- Tenrecs
- Thryonomyidae -- Cane rats
- Thylacinidae -- Tasmanian wolf, Thylacine, Thylacines, Tasmanian wolf and thylacine, Tasmanian wolf thylacine
- Thylacomyidae
- Thyropteridae -- Disc-winged bats
- Tragulidae -- Chevrotains, Mouse deer
- Trichechidae -- Manatees
- Tupaiidae -- Tree shrews
- Ursidae -- Bears
- Vespertilionidae -- Evening bats, Vesper bats
- Viverridae -- Civets, Genets, Linsangs
- Vombatidae -- Wombats
- Zapodidae -- Jumping Mice
- Ziphiidae -- Beaked whales, Beaked Whales
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