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Class MAMMALIA
Infraclass ORNITHODELPHIA
 Order MONOTREMATA
  Tachyglossidae (2,4) Echidnas 
  Ornithorhynchidae (1, 1) Duck-billed platypus 

Infraclass METATHERIA
 Order DIDELPHIMORPHIA Didelphidae (17, 87) New World Opossums 
Order PAUCITUBERCULATA
  Caenolestidae (3, 6) Shrew or rat opossums 
 Order MICROBIOTHERIA
  Microbiotheriidae (1, 1) Monito del monte 
 Order DASYUROMORPHIA
  Thylacinidae (1,1) Tasmanian wolf (extinct)
  Myrmecobiidae (1, 1) Numbat
  Dasyuridae (20, 69) Marsupial mice, Tasmanian devil
 Order NOTORYCTEMORPHIA
  Notoryctidae (1, 2) Marsupial moles
 SYNDACTYLA
 Order PERAMELEMORPHIA
  Peramelidae (6, 19) Bandicoots and echymiperas
  Thylacomyidae (1, 2) Bilbies
 Order DIPROTODONTIA
  Phascolarctidae (1, 1) Koala
  Vombatidae (2, 3) Wombats
  Phalangeridae (6, 27) Cuscuses, brushtail possums
  Potoroidae (4, 7)Potoroos, bettongs
  Macropodidae (11, 65) Kangaroos, wallabies, pademelons
  Hypsiprymnodontidae (1, 1) Musky rat kangaroos
  Acrobatidae (2, 2) Feathertail glider, possum
  Burramyidae (2, 5) Pygmy possums
  Pseudocheiridae (6, 17) Ringtailed possums
  Petauridae (3, 15) Striped possums, wrist-ringed gliders
  Tarsipedidae (1, 1) Honey possum

Infraclass EUTHERIA
 INSECTIVORA (now divided in 3 orders)
 Order AFROSORICIDA
  Tenrecidae (10, 30) Tenrecs, otter shrews
  Chrysochloridae (9, 21) Golden moles
 Order ERINACEOMORPHA
  Erinaceidae (10, 24) Hedgehogs, gymnures
 Order SORICOMORPHA
  Solenodontidae (1, 2)Solenodons
  Nesophontidae (1, 8) Nesophontids (extinct)
  Soricidae (26, 376) Shrews
  Talpidae (17, 39) Moles and desmans

  Order MACROSCELIDEA
   Macroscelididae (4, 15) Elephant shrews 

  Order SCANDENTIA
   Tupaiidae (4, 19) Tree shrews
   Ptilocercidae (1, 1) Pen-tailed shrews

  Order DERMOPTERA
   Cynocephalidae (2, 2) Colugos
   
  Order CHIROPTERA
   Macrochiroptera
    Pteropodidae (42, 186) Old World fruit bats
   Microchiroptera
    Rhinopomatidae (1, 4) Mouse-tailed bats
    Craseonycteridae (1, 1) Kitti's hog-nosed bat
    Emballonuridae (13, 51) Sac-winged or sheath-tailed bats
    Nycteridae (1, 16) Slit-faced bats
    Megadermatidae (4, 5) False vampire bats
    Rhinolophidae (1, 77) Horseshoe bats
    Hipposideridae (9, 81) Trident and leaf-nosed bats
    Noctilionidae (1, 2) Fishing bats
    Mormoopidae (2, 10) Leaf-chinned bats
    Phyllostomidae (55, 160) New World leaf-nosed bats
    Natalidae (3, 8) Funnel-eared bats
    Furipteridae (2, 2) Smoky bats
    Thyropteridae (1, 3) Disk-winged bats
    Myzopodidae (1, 1) Sucker-footed bat
    Vespertilionidae (48, 407) Common bats
    Mystacinidae (1, 2) Short-tailed bats 
    Molossidae (16, 100) Free-tailed bats

  Order PRIMATES
   Strepsirhini
    Cheirogaleidae (5, 21) Dwarf and mouse lemurs
    Lemuridae (5, 19) Lemurs
    Lepilemuridae (1, 8) Sportive lemurs
    Indridae (3, 11) Indrid lemurs, sifakas
    Daubentoniidae (1, 1) Aye-aye
    Lorisidae (5, 9) Lorises, potto
    Galagidae (3, 19) Bushbabies, galagos
   Haplorhini
    Tarsiidae (1, 7) Tarsiers
    Cebidae (11, 56) Marmosets and capuchins
    Aotidae (1, 8) Night monkeys
    Pitheciidae (4, 40)
    Atelidae (5, 24) Howler monkeys
    Cercopithecidae (18, 81) Old World monkeys
    Hylobatidae (1, 11) Gibbons, siamang
    Hominidae(4, 5) Gorilla, chimpanzees, orangutan, humans

 XENARTHRA (now divided in two orders)
  Order CINGULATA
  Dasypodidae (9, 21) Armadillos
  Order PILOSA
  Bradypodidae (1, 4) Three-toed sloths
  Megalonychidae (1, 2) Two-toed sloths
  Myrmecophagidae (2, 3) True anteaters
  Cyclopedidae (1,1) Silky anteater

 Order PHOLIDOTA
  Manidae (1, 8) Pangolins 

 Order TUBULIDENTATA
  Orycteropodidae (1, 1) Aardvark

 Order CARNIVORA
  Caniformia
   Canidae (13, 33) Wolves, coyote, foxes, jackels
   Procyonidae (6, 18) Raccoon, kinkajou, red panda
   Mustelidae (25, 65) Weasels, skunks, otters
   Ursidae (6, 19) Bears, panda
   Odobenidae (1, 1) Walrus
   Otariidae (7, 14) Sea lions
   Phocidae (10, 19) Seals
  Feliformia
   Felidae (18, 36) Lion, bobcat, cheetah, puma
   Herpestidae (18, 37) Mongooses
   Hyaenidae (4, 4) Hyenas, aardwolf
   Viverridae (20, 34) Civets, genets

 UNGULATA
  Order ARTIODACTYLA
   Suiformes Suidae (5, 16) Pigs, warthogs
    Tayassuidae (3, 3) Peccaries
    Hippopotamidae (2, 2) Hippopotamuses
   Tylopoda
    Camelidae (3, 6) Camels, llamas, vicuna
   Ruminantia
    Tragulidae (3, 4) Chevrotains
    Giraffidae (2, 2) Giraffe, okapi
    Moschidae (1, 4) Musk deer
    Cervidae (16, 42) Deer, elk, moose
    Antilocapridae (1, 1) Pronghorn antelope
    Bovidae (45, 137) Antelope, sheep, goats, buffalo, bison, cattle
  Order CETACEA
   Mysticeti
    Balaenidae (2, 3) Bowhead and right whales
    Balaenopteridae (2, 6) Rorquals
    Eschrichtiidae (1, 1) Gray whale
    Neobalaenidae (1, 1) Pigmy right whale
   Odontoceti
    Delphinidae (17, 32) Dolphins
    Monodontidae (2, 2) Narwhal, beluga
    Phocoenidae (4, 6) Porpoises
    Physeteridae (2, 3) Sperm whales
    Platanistidae (4, 5) River dolphins
    Ziphiidae (6, 19) Beaked whales

  Order PERISSODACTYLA
   Equidae (1, 9) Horses, asses, zebras
   Tapiridae(1, 4) Tapirs
   Rhinocerotidae (4, 5) Rhinceroses
  Order HYRACOIDEA
   Procaviidae (3, 11) Hyraxes
  Order SIRENIA
   Dugongidae (1, 1) Dugong [Stellar seacow]
   Trichechidae (1, 3) Manatees
  Order PROBOSCIDEA
   Elephantidae (2, 2) Elephants

 GLIRES
  Order RODENTIA
   Sciurognathi
    Aplodontidae (1, 1) Mountain beaver
    Sciuridae (50, 273) Squirrels, marmots
    Castoridae (1, 2) Beavers
    Geomyidae (5, 35) Pocket gophers
    Hetromyidae (6, 59) Pocket mice, kangaroo rats
    Dipodidae (15, 51) Jerboas, birch mice, jumping mice
    Muridae(281, 1326) Rats and mice
    Anomaluridae (3, 7) Scaly-tailed squirrels
    Pedetidae (1, 1) Springhaas
    Ctenodactylidae (4, 5) Gundis
    Myoxidae (8, 26) Doormice
   Hystricognathi
    Bathyergidae (5, 12) Mole rats
    Hystricidae (3, 11) Old World porcupines
    Petromuridae (1, 1) Dassie rat
    Thryonomyidae (1, 2) Cane rats
    Erethizontidae (4, 12) New World Porcupines
    Chinchillidae (3, 6) Chinchillas, viscachias
    Dinomyidae (1, 1) Paracana
    Caviidae (5, 14) Cavies, guinea pigs, Patagonian hare
    Hydrochaeridae (1, 1) Capybara
    Dasyproctidae (2, 13) Agoutis, acouchis
    Agoutidae (1, 2) Pacas
    Ctenomyidae (1, 38) Tuco-tucos
    Octodontidae (6, 9) Viscacha rats, coruro
    Abrocomidae (1, 3) Chinchilla rats
    Echimyidae (16, 71) Spiny rats
    Capromyidae (4, 12) Hutias
    Myocastoridae (1, 1) Nutria
  Order LAGOMORPHA
   Ochotonidae (2, 26) Pikas
   Leporidae (11, 54) Rabbits, hares
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