Early Pliocene to Early Pleistocene; Extinct.
South Florida to North Carolina.
- Early Pleistocene
- Chowan River Formation (NC)
- Waccamaw Formation (Upper) (NC)
- Late Pliocene
- Duplin Formation (SC, NC)
- Duplin / Raysor formations (GA)
- Jackson Bluff Formation (N. FL)
- Raysor Formation (SC, NC)
- Tamiami Formation (Pinecrest Beds) (S. FL)
- Early Pliocene
- Goose Creek Limestone (Upper) (SC)