Armadillos are small placental mammals, known for having a leathery armor shell. The Dasypodidae are the only surviving family in the order Cingulata, part of the superorder Xenarthra along with the anteaters and sloths. The word armadillo is Spanish for "little armored one". There are approximately 10 extant genera and around 20 extant species of armadillo, some of which are distinguished by the number of bands on their armor.