![]() New adaptations occurred as major environmental changes were underway.By 14 million years ago, the dasyurid family radiated into many new forms (Krajewski et al.By about 24 million years ago (latest Oligocene-earliest Miocene) the subfamily to which Tasmanian devils belong (Dasyurinae) separated from the subfamily that led to mouse-sized dunnarts (Sminthopsinae).Around 25 million years ago (Late Oligocene) the thylacinids and dasyurid families diverged (Muirhead & Wroe 1998).The currently recognized earliest marsupial known from dental, skull, and post-cranial fossils is Djarthia from southeastern Queensland.2008), however, raise the possibility that some early South American marsupials were actually immigrants from the southern continents of Gondwana/Australia to South America ![]() ![]() Traditional hypotheses suggest marsupial taxa dispersed from South America to Australia at this time.Marsupials probably arrived in Australia between 71.2 to 65.2 million years ago (Late Cretaceous) (Beck 2008). ![]()
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