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FAMILY DIDELPHIDAE

    Members of the family Didelphidae are distributed throughout much of South America and opossums have colonized regions of North America as well. The members of this family very in size from 11 cm to more than a meter in length.  The number of vertebrae varies from 47 to 63 and the number of teats from 7 to 25.  This family of marsupials varies in the presence of the pouch.  The pouch is present in some genera (such as Caluromys, Chironectes, and Didelphis) while a pair of skin folds which enclose the nipples exist in other genera (such Marmosa, Monodelphis, and Philander). 

MARSUPIALS skull
skull skull
skull skull
skull skull
marsupials
marsupials