Various species of armadillo
There are twenty living species of armadillo, a mere fraction of what formerly existed. An extinct gigantic armadillo called the glyptodont (Glyptodon) that had a single piece domed shell as big as a small car. One such shell has been found and it appears to have been used by early man as a tent. In the glyptodonts, not only was the body heavily armoured, but the top of the head was covered with a thick shield of bony armour, as was the tail. The ends of the tail were often provided with an enlarged, spiked knob of bone, which was probably used for defence. The biggest surviving species is the Giant Armadillo, (Priodontes giganteus) the size of a pig, which lives in the forests of Brazil. Like all the group, it is very largely insectivorous and consumes great quantities of ants. In Paraguay the little three banded armadillo (Tolypeutes matacus) trots about on the tips of its claws and can roll into a neatly fitting impregnable ball. Down in the pampas of Argentina there are small Hairy Armadillos (Chaetophractus villosus) that are mole like and seldom come to the surface except at night. All armadillos have teeth. The Giant Armadillo has about a hundred, which is almost a mammalian record, but they are small, simple and peg like.