#FS-262 Tooth of a Horse (Equus ferus caballus), from the Pleistocene - the Ice Age, 10,000-15,000 years old. This was a genus of Equus native to the Americas until an extinction event at the end of the Pleistocene epoch. Approximately 2.75 inches long. Found in the USA. This is a one-of-a-kind specimen - once sold, it is gone.