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| | D. Croft South American Mammals |
 | | Xenarthra is a very unusual group of mammals that includes sloths, armadillos, anteaters, and their extinct relatives; they all share the presence of a unique type of connection between the vertebrae (the bones of the spine). |
 | | Ameridelphia includes the New World "pouched" mammals (though most lack pouches) such as extant opossums and various extinct forms resembling jumping rats, "insectivores," and carnivorans. |
 | | Xenarthrans are a peculiar group that includes sloths (both tree sloths and ground sloths, some giant), anteaters, armadillos, glyptodonts (large armored mammals) and pampatheres. |
| www.dcpaleo.org /Research/SAMammals/SAMammals.html (1653 words) |
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