the megafauna in the Americas, they all became extinct at the end of the last ice age 10,000 years ago. Behaviour Glyptodonts were grazing herbivores. Like many other xenarthrans, they had no incisor or canine teeth, but had a number of cheek teeth that would have been able to grind up tough vegetation, such as grasses. They also had distinctively deep jaws, with large downward bony projections that would have anchored their powerful chewing muscles. Extinction Glyptodonts became extinct at the end of the last ice age along with a large number of other megafaunal species, including pampatheres, the giant ground sloths, and Macrauchenia. Their much smaller, more lightly armored and flexible armadillo relatives survived. The extinction of the glyptodonts coincided with the arrival of early humans in the Americas. Archeological evidence suggests that these humans made use of the animals' armored shells, however, other causes cannot be ruled out. References External links Glyptodont article at ScienceBlogs, with photos Cingulates Prehistoric cingulates Lutetian first appearances Holocene extinctions Neogene mammals of South America Pleistocene mammals of South America Pleistocene mammals of North America Taxa named by Hermann Burmeister