Glyptotherium is an extinct genus of glyptodont, a group of extinct mammals related to the armadillo living from 4.1 to 1.5 million years ago (AEO). The genus is considered an example of North American megafauna, of which most have become extinct. Glyptotherium may have been wiped out by climate change or human interference. Glyptotherium was named by Osborn in 1903, assigned to Glyptodontinae by Downing and White in 1995 and to Glyptodontidae by Osborn (1903), Brown (1912), Carroll (1988), Cisneros (2005) and Mead et al. (2007).