During this period, a wide array of Xenarthrans inhabited the Pampas were hunted by humans, with evidence demonstrating that the small (300-450 kg) glyptodont Neosclerocalyptus, the armadillo Eutatus, and the gigantic (2 ton) glyptodont Doedicurus, the largest glyptodont known, were hunted. The only other record of human predation from outside the Pampas was a partial carapace, found also in Venezuela, that was eviscerated by humans. The discoveries in the localities in Falcón showed the first signs of human hunting on the skulls of glyptodonts, but Glyptotherium also was more defenseless than glyptodonts like Doedicurus. Distribution Glyptotherium is the only known North American glyptodont and is known from several regions of the continent from different periods. During the Blancan stage of the Early Pliocene, Glyptotherium texanum inhabited only central Mexico based on the discovery of a single osteoderm of Glyptotherium texanum from the early-middle Pliocene strata of Guanajuato, central Mexico. In the Blancan-Irvingtonian stages of the Early Pleistocene, G. texanum fossils are known from most of Mexico as well as the U.S. states of Arizona, Texas, Oklahoma, and Florida. In the Rancholabrean of the Late Pleistocene, G. cylindricum evolved from G. texanum and its fossils have been unearthed from northern Venezuela, eastern Brazil, Central America, Mexico, and the U.S. states of Texas, Louisiana, Florida, and even as far north as South Carolina. Fossils from Glyptotherium from the Early Pliocene have not been found in Central America, but it is likely that G. texanum inhabited the area during the Great American Biotic Interchange. Unfortunately, glyptodont fossils from the middle-late Irvingtonian are not known from North America, creating a “glyptodont gap” in the fossil record. Although commonly regarded as an exclusively North American genus, fossils of Glyptotherium from northern South America in areas like Brazil and Venezuela have been discovered. These include fossils previously referred to Glyptodon and Hoplophorus from southeastern and northeastern Brazil, as many fossils were hastily assigned to both by 19th century paleontologists. One of the specimens reassigned to Glyptotherium, an isolated dorsal carapace osteoderm, was collected from Pleistocene age carbonate caves in Lagoa Santa, Minas Gerais, Brazil by Friedrich von Sellow during the early 1800s. It was later described as a new species of Hoplophorus, H. meyeri, in 1845 by Danish paleontologist Peter Wilhelm Lund. Lund incorrectly named the taxon however, making it a nomen nudum. The osteoderm was referred to Glyptotherium in 2010, making it the first known