Richard Lydekker, 1911 Encyclopædia Britannica, Volume 12… (1911)
“ In the early Pleistocene epoch, when South America became connected with North America, some of the glyptodonts found their way into the latter continent. Among these northern forms some from Texas and Florida have been referred to Glyptodon. One large species from Texas has, however, been made the type of a separate genus, under the name of Glyptotherium texanum. In some respects it shows affinity with Panochthus, although in the simple structure of the tail-sheath it recalls the undermentioned Propalaeohoplophorus. ”
