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Class Mammalia
in kingdom Animalia, phylum Chordata, subphylum vertebrata.

Subclass Prototheria
extinct mammals with egg laying abilities
one living infra-class.

subclass Theria
complex mammals of two infra classes
marsupials and Placental mammals

infraclass ornithodelphia
egg laying mammals, one living order including platypus and spiny anteater

infraclass Metatheria
marsupial pouched animals, kangaroos, koalas, Tasmanian devils.
Infraclass Eutheria
Placental mammals

order Eulipotyphla
fromaly known as insectivora.
insects eating mammals.
shrews, hedgehogs, moles.

Order Chiroptera
bats, only ture flying mammal

Order Carnivora
flesh eating mammals
Family Canidae
dogs and relatives
Family Felidae
cats and relatives

Family Ursidae
bears and relatives

Family Procyonidae
raccoons and coatis

Family Mustelidae
good fur bearing animals, skunks, weasels, otters, badgers, minks, and wolverines.

Subfamily Pinnipedia
sea lions, seals, and walruses

Order Perissodactyla
odd-toed hoofed mammals, horses, zebras, and rhinos

Order Artiodactyla
even toed mammals, swine, camels, giraffes, deer, hippos, antelopes, cattle, sheep, and goats.

Order Cetacea
whales, dolphins, porpoises

Order Cetartiodactyla
some sources have whales and even toed animals in the same order.

Superorder Xenarthra
armadillos, sloths, and anteaters

Order Cingulata
Armadillos
body covered in armer plates and they have plantigrade feet

Order Pilosa
sloths and anteaters
hindfoot is four toed and forefoot is 2 or 3 toed.

Order Rodentia
rodents

Family Sciuridae
squirrels, chipmunks, prairie dogs

Family Muridae
Rats, mice, and relatives

Family Castoridae
Beavers

Family Hystricidae
Porcupines

Family Hydrochaeridae
Capybaras, and guinea pigs

Order Primates
monkeys, apes, and humans
Most highly developed brains of all organisms

Order Lagomorpha
rabbits
have constantly growing incisors

Order Sirenia
sea cows, manatees and dugongs

Order Proboscidea
elephants
proboscis or trunk
largest living land animal
