Australian tiger

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The Australian tiger (Thylacinus cynocephalus australius) is the largest known carnivorous marsupial of future times. It is commonly known as the Australian wolf. It is native to Australia (because the thylacine population spread across Australia). It was one of the two last extant members of its family, Thylacinidae; specimens of other members of the family have been found in the fossil record dating back to the late Anambrian. It also evolved from the Tasmanian tiger in the early Anambrian (4 million years from now).

Surviving evidence suggests that it is a relatively shy, nocturnal creature with the general appearance of a medium-to-large-size dog, except for its stiff tail and abdominal pouch (which was reminiscent of a kangaroo) and a series of dark leopard spots that radiated from the top of its back (making it look a bit like a leopard). The Australian tiger is an apex predator, like the tigers and wolves of the Northern Hemisphere from which it obtained two of its common names. As a marsupial, it was not closely related to these placental mammals, but because of convergent evolution it displayed the same general form and adaptations. Its closest living relative is thought to be either the Tasmanian devil, the Tasmanian tiger, or the numbat. The male Australian tiger has a pouch that acts as a protective sheath, covering his external reproductive organs while he ran through thick brush. The Australian tiger has been described as a formidable predator because of its ability to survive and hunt prey in extremely sparsely populated areas.

Evolution
The Australian tiger first appeared about 4 million years in the future. New species of the family Thylacinidae date back to the beginning of the Anambrian. Dickson's thylacine (Nimbacinus dicksoni) is the oldest of the seven discovered fossil species, dating back to 23 million years ago. This thylacinid is larger than its long-extinct relatives.