Diprotodontia

order of mammals Marsupials (Diprotodontia) is an order comprising closely related families of organisms. It contains 9 families with 52 known species. Key family groups include Acrobatidae, Burramyidae, Kangaroos, Petauridae, Phalangeridae, and Koalas. Among its members, 20 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). Well-known representatives include koala. It belongs to Mammals (Mammalia).