Early Miocene to Early Pleistocene; Extinct.
Southern Florida to Virginia.
- Early Pleistocene
- Caloosahatchee Formation (S. FL)
- Late Pliocene
- Duplin Formation (SC, NC)
- Duplin / Raysor formations (GA)
- Jackson Bluff Formation (N. FL)
- Raysor Formation (SC)
- Tamiami Formation (Pinecrest Beds) (S. FL)
- Yorktown Formation (NC, VA)
- Early Pliocene
- Goose Creek Limestone (Upper) (SC)
- Early Miocene
- Chipola Formation (N. FL)