Pampatheriidae

Pampatheriidae ("Pampas beasts") is an extinct family of large plantigrade armored xenarthrans related to Glyptodontidae, an extinct family of much larger and more heavily armored xenarthrans, as well as to smaller extant armadillos (Dasypodidae). However, Pampatheriidae has existed as a separate lineage at least since the middle Eocene Mustersan age, 45 to 48 million years ago. Pampatheres evolved in South America during its long period of Cenozoic isolation. Although widespread, they were less diverse and abundant than the armadillos.Holmesina spread to North America after the formation of the Isthmus of Panama as part of the Great American Interchange. They finally disappeared on both continents in the end-Pleistocene extinctions, about 12,000 years ago.

Pampatheres are believed to have attained a weight of up to 200 kg (440 lb). Like three-banded armadillos, and unlike glyptodonts, their armored shell was given some flexibility by three movable lateral bands of scutes. The osteoderms (bony plates in the skin comprising the armor) of pampatheres were each covered by a single keratinized scute, unlike osteoderms of armadillos, which have more than one scute.