Early Pliocene to Early Pleistocene; Extinct.
South Florida to Virginia.
- Early Pleistocene
- Chowan River Formation (VA)
- Late Pliocene
- Duplin Formation (SC)
- Raysor Formation (SC)
- Tamiami Formation (Pinecrest Beds) (S. FL)
- Yorktown Formation (NC, VA)
- Yorktown Formation (Sunken Meadow Member) (VA)
- Early Pliocene
- Goose Creek Limestone (Upper) (SC)