Short faced kangaroo, diprotodon (both extinct)
There are many mammals found in Australia, and many of these are unique to the continent:KangarooKoalaDingo
Humans
Neither. Possums, or at least true possums, which are found in Australia, are marsupials.
The only mammal found in every climate and on every continent is homo sapiens, or "us". Humans.
A marine mammal found in the water around Australia would be the dugong.
The quoll is a carnivorous marsupial mammal found only in Australia and New Guinea.
A dugong is an aquatic mammal that is distinguished from the manatees by its forked tail. It is found in warm coastal waters from East Africa to Australia.
There is no such mammal. Platypuses and echidnas are the only egg-laying mammals. The platypus is endemic to Australia, and the two species of echidna are not found outside of Australia or New Guinea. There are no egg-laying mammals in New Zealand.
The Duck-billed Platypus (Ornithorhynchus anatinus) is a semi-aquatic, egg laying mammal native to Australia and Tasmania.
The platypus is found only in Australia. However, both species of echidna are found in New Guinea. The long-beaked echidna is found in New Guinea but not Australia, while the short-beaked echidna is found in a small corner of Papua New Guinea, but all over the Australian continent.
No. The star-nosed marsupial is not a marsupial, but a placental mammal. The only marsupial moles are found in northern Australia.
* The Tasmanian Devil is an Australian marsupial * A dingo is an Asian and Australian placental mammal, though it is not native to Australia * An echidna is a monotreme (egg-laying mammal) found in Australia, while another species is found in Papua New Guinea * The kiwi is a small, flightless bird of New Guinea