Late Pliocene to Late Pleistocene; Extinct.
South Florida to North Carolina.
- Late Pleistocene
- Fort Thompson Formation (S. FL)
- Early Pleistocene
- Caloosahatchee Formation (S. FL)
- Nashua Formation (N. FL)
- Waccamaw Formation (SC, NC)
- Late Pliocene
- Duplin Formation (NC)
- Tamiami Formation (Pinecrest Beds) (S. FL)