Doedicurus is an extinct armored plant-eating armadillo from 1.8 million to 11,000 years ago. Its heavy bony armor and spiked tail club helped protect it from sabre-toothed predators and other hunters. It lived in South America during the Pleistocene and was considered part of its "megafauna" due to its large size at 13 feet long.

Doedicurus was built like a small tank with a spectacular domed ‘shell’. It also had a distinctive tail with an armored ‘tube’, and a dangerous spiked club on the end. It waddled around on four short legs with powerful blunt claws. Its relatively small skull was short and deep with a blunt face. At 13 feet long it was the largest of its kind.