Late Pliocene to Early Pleistocene; Extinct.
Southern Florida to South Carolina.
Note: Duplin Fm. occurrence point for Sumter County, SC not included on Late Pliocene map.
- Early Pleistocene
- Nashua Formation (N. FL)
- Late Pliocene
- Duplin Formation (SC)
- Tamiami Formation (Pinecrest Beds) (S. FL)