I would imagine that marsupials are most common in Australia.
Placenta in the mother marsupial. Using the mother's blood supply, allowing longer gestation times. Like other mammals, the marsupials are covered with hair.
Grown almost to the mother's size. In fact, than placental mammals. Mid- to late-Tertiary.
An important group of land mammals. Forms are similar to the North American opossum. And are the dominant native mammals.
Tasmanian devils, wombats (above right), and other typical Australian mammals. Until recently, they also included the marsupial wolf, Thylacinus (below). The quagga, the marsupial wolf is now extinct.
Was seen in Tasmania in the 1950s. Mammals, they are quite structurally diverse. Different parts of the world.
Independently in the two groups.
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