Tetrapoda : Mammalia

Mammals are: warm blooded air breathing bear live young have hair or fur sophisticated brains

MONOTREMESMonotremata. Duck-billed platypuses and spiny anteaters. MARSUPIALS Marsupialia. Kangaroos, wallabies, opossums, wombats, koalas. PLACENTAL MAMMALSInsectivora (insect eaters). Shrews, moles, hedgehogs.Dermoptera. Colugos or flying lemurs.Chiroptera. Bats.Primates. Tree shrews, lemurs, monkeys, marmosets, great apes, humans.Edentata. Sloths, armadillos, anteaters.

Pholidota. Pangolins or scaly anteaters.Lagomorpha. Hares, rabbits, pikas Rodentia (gnawers). Mice, rats, squirrels, porcupines, beavers.Cetacea. Dolphins, porpoises, whales.Carnivora (flesh eaters). Cats, dogs, bears, weasels, hyenas, racoons, badgers.Pinnipedia. Seals, sea lions, walruses.Tubulidentata. Aardvarks.Proboscidea. Elephants.Hyracoidea. Hyraxes, dassies.Sirenia. Manatees, sea cows, dugongs.Perissodactyla (odd-toed hoofed animals). Horses, asses, zebras, tapirs, rhinoceroses.Artiodactyla (even-toed hoofed animals). Pigs, cattle, sheep, goats, antelopes, alpacas, camels, deer, giraffes, hippopotamuses.

Classes of Mammalia

Mammalia: Tetrapoda: Monotreme

Native only to Tasmania and eastern and southern Australia, the platypus is the sole member of the mammal family Ornithorhynchidae.

It is one of two animals that form the order Monotremata (egg-laying mammals), the other being Australia's spiny anteater.

The platypus, also known as the duckbill, watermole, or duckmole, is a shy, reclusive animal that lives near lakes and streams.

The female has no nipples; instead, milk oozes through slits in her abdomen where it is licked up by the young.

Tetrapoda: Mammalia: Marsupials

Mammals that carry their young in an abdominal pouch during their early development are called marsupials. Soon after the marsupial ovum, or egg, is fertilized, the young are born in a premature state and crawl into the mother's pouch. There, nursing on milk from their mother's nipples, they complete their development.

Opossum

Mammalia: Tetrapoda: Placental Mammals

Mammalia: Insectovora and Dermoptera

Insectivora (insect eaters). Shrews, Dermoptera. Colugos or flying lemurs. moles, hedgehogs.

Shrew

Mole

Mammalia: Chiroptera and Primates

Chiroptera. Bats. Primates. Tree shrews, monkeys, marmosets, great apes, humans.

Mammalia: Edentata and Pholidita

Edentata. (toothless)Sloths, armadillos, anteaters

.

Entirely covered with large, brown, overlapping scales, the pangolin is well protected against predators. When threatened, the pangolin rolls into a tight ball, causing the sharp, free edges of the scales to rise. Pangolins eat ants and termites, which they lap up with their long, sticky tongues

Pholidota. Pangolins or scaly anteaters

Mammalia: Lagomorpha and Rodentia

Rodentia (gnawers). Mice, rats, squirrels, porcupines, beavers.

Lagomorpha. Hares, rabbits, pikas, plant-eating mammals characterized by a short tail and two pairs of upper incisors, one behind the other.

Mammalia: Cetacea

Cetacea. Dolphins, porpoises, whales, nearly hairless, fishlike water mammals, lacking external hind limbs, but having paddlelike forelimbs.

Mammalia: Carnivora

Carnivora (flesh eaters). Cats, dogs, bears, weasels, hyenas, racoons, badgers.

Mammalia: Pinnipedia and Tubulidenta

Pinnipedia. (finned feet) Seals, sea lions, walruses.

Aardvarks are classified in an order by themselves, the Tubulidentata, meaning "tube-toothed." The tubular teeth are without enamel or roots.

Mammalia: Proboscidea and Hyracoidea

Proboscidea. Elephants, large mammals having tusks and a long, flexible, tubelike snout

.Hyracoidea. Hyraxes, dassiesThe hyrax looks similar to a large rabbit, but is actually more closely related to horses and elephants. It is found in Africa and parts of the Middle East.

Mammalia: Sirenia The manatee is a slow-moving, seal-shaped

mammal that lives in shallow coastal waters or rivers with rich plant growths. Manatees frequently communicate by muzzle-to-muzzle contact and, when alarmed, emit chirpy squeaks. All three species the Caribbean, Amazonian, and African manatees are declining in population because they have been heavily hunted. Adults may grow to lengths of 15 feet (4.6 meters). They are stout, thick-skinned, and almost hairless with a broad, shovellike tail. They have only one pair of limbs weak front flippers which they use to push algae, such as seaweed and other water plants toward their mouths.

Mammalia: Perissodactyla

Perissodactyla (odd-toed hoofed animals). Horses, asses, zebras, tapirs, rhinoceroses.

Tapir

Zebra

Kiangs

Mammalia: Artiodactyla

Artiodactyla (even-toed hoofed animals). Pigs, cattle, sheep, goats, antelopes, alpacas, camels, deer, giraffes, hippopotamuses.