Form
It is suggested that the Patagonian opossum may have emerged from the same ancestral group as the Marmosa. The two species have conformed rather closely to each other. In the winter both species show similarly thick tails at the base, this is used to accumlate fat to that reigon of the tail. Yet they do not share all aspects of their life, Patagonian opossums has a specialized way to gather and consume food, which is made possible by the shortening of their skull and jaws. The shortening occurs in the premolar region, this allows the Patagonian opossum to experience an increase in biting power.
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