The material from this site is reposited in the Illinois State Museum collection. This jaw bone is one example. Both Platygonus and Mylohyus became extinct in North America approximately 10,000 years ago. The reason for their extinction is being studied by paleontologists. This map shows some of the important localities at which they have been found in the region.
Peccaries have a long fossil history.
They first evolved around 33 million years ago in either North America or Eurasia. They are present in North America from that time right through to the present. Between about 5 and 33 million years ago they were also found in the Old World. Peccaries dispersed into South America approximately 2.5 million years ago and have been successful in that area since. Three species of peccary are alive today.