 An archaeological study showed that Maya from Cozumel used raccoons of reduced stature, which suggests that the size reduction of this raccoon is not a recent phenomenon.No true fossils of the species are known, although skeletons have been found at some archeological sites on the island.Cozumel island itself separated from the mainland during the late Pleistocene, so that the species is unlikely to be older than 122,000 years.