What are the three subclasses of mammals?

Answer 1

Mammals are one of the six basic groups of animals. They have backbones and thus belong to the Chordata. Mammals include the following subgroups:

• Artiodactyla (even-toed ungulates)
• Carnivora (carnivores)
• Cetacea (cetaceans)
• Chiroptera (bats)
• Dermoptera (flying lemurs)
• Hyracoidea (hyraxes)
• Insectivora (insectivores)
• Lagomorpha (rabbits, hares, and pikas)
• Macroscelidea (elephant shrews)
• Marsupialia (marsupials)
• Montremata (monotremes)
• Perissodactyla (odd-toed ungulates)
• Pholidota (pangolins)
• Pinnipedia (seals and sea lions)
• Primates (primates)
• Proboscidae (elephants)
• Rodentia (rodents)
• Scandentia (tree shrews)
• Sirenia (dugong and manatees)
• Tubulidentata (aardvark)
• Xenarthra (anteaters and relatives)

Answer 2

• Eutheria ---> Placental Mammals (born with placentas)
• Metatheria ---> Have pouches
• Monotomata ---> 2 Mammal families are born in leathery eggs (platypus and i forget the other)

Answer 3

I think think this question should refer one to taxonomy

Three categories of mammal refer to their reproduction.

5 species are monotremes the only egg laying mammals. They lay soft shelled reptilian like eggs. They do not have teats; the milk just seeps through the skin. The eggs are what define this group. In this group are echidnas and platypuses. The group is the taxonomic order Order Monotremata

292 species are marsupials that have short gestation periods, the young are born helpless and at birth crawl to a teat in a pouch which they latch onto feeding on milk until they are better developed. It is the presence of the pouch that defines this group. The group taxonomically is a supercohort Supercohort Marsupialia and has multiple order including possums, opossums, koalas, Tasmanian devils, wombats, numbats, marsupial moles, antechinuses and kangaroos.

The rest of the 5096 species of mammals are eutherians.They nurture young in the womb, feeding off a placenta for a much more extended period than marsupials, resulting in better developed yound being born. The placenta is the defining feature. Eutheria is a taxonomic infraclass including multiple orders which include mice, rats, porcupines, bats, dolphins, whales, seals, cats, dogs, bears, wolverines, rabbits, manatees, hyraxes, horses, hippopotamuses, antelopes, deer, pigs, giraffes, camels, okapis, vicunas, monkeys, apes, tree shrews, tarsiers, elephants, elephant shrews, shrews, tenrecs, rhinoceroses, humans, hyaenas, mongooses, badgers, otters, otter shrews, shrews and many more.............

Answer 4

First, click on Animal Life. Next, click on wild animals, even though you won't always be looking for wild animals for mammals. Then, click on Mammals.

Answer 5

Mammals, amphibians, reptiles, and birds....

Answer 6

1.) Placentals2.) Monotremes

3.) Marsupials

Answer 7

Aquatic mammals, land mammals, flying mammals

Answer 8

monotremes, marsupials, eutherians.

Answer 9

placental mammals

marsupials