Can Marsupials Be Mammals?

Marsupials are any members of the mammalian infraclass Marsupialia. All extant marsupials are endemic to Australasia and the Americas. ... Like other mammals in the Metatheria, they give birth to relatively undeveloped young that often reside in a pouch located on their mothers' abdomen for a certain amount of time.

Are marsupials not mammals?

There are three groups of mammals, and the marsupials are one. All mammals are either Monotremes (echidnas and the platypus), Marsupials, or Placentals (us and dogs and monkeys and things). The lion's share of mammal species are placentals (around 4,000 species).

How many mammals are marsupials?

A marsupial is any of the more than 250 species belonging to the infraclass Metatheria (sometimes called Marsupialia), a mammalian group characterized by premature birth and continued development of the newborn while attached to the nipples on the mother's lower belly.