Thursday, March 18, 2004


Xenarthrans are known only from the Western Hemisphere and arose in South America during the Paleocene Epoch (65 million to 54.8 million years ago). The fossil record shows that the group was both more diverse and more widely distributed as recently as the Pleistocene Epoch (1,800,000 to 10,000 years ago), when ground sloths colonized the islands of the Greater Antilles and glyptodonts,


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