Late Pliocene to Early Pleistocene; Extinct.
North Florida to Virginia.
- Early Pleistocene
- Chowan River Formation (NC)
- Waccamaw Formation (NC)
- Late Pliocene
- Duplin Formation (SC, NC)
- Duplin / Raysor formations (GA)
- Jackson Bluff Formation (N. FL)
- Raysor Formation (SC)
- Yorktown Formation (VA)
- Yorktown Formation (Sunken Meadow Member) (VA)