Welcome to Thylacoleo - Australia's Marsupial Lion, a natural history of the marsupial family Thylacoleonidae.  Thylacoleonids are predatory marsupials which lived in Australia from Late Oligocene times until the end of the Pleistocene.  Members of this marsupial family varied in dimensions from that of a house cat to nearly the size of an African lion.  The most famous species of the family is Thylacoleo carnifex, which is often referred to as the "Marsupial lion" due to its large size.

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