Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1320973
| MD | Charles | Lagoon of Potomac River near base of Peninsula, near Prince Georges County line | 1984 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
234300
| MD | Prince George's | Muirkirk, Twin Ponds | 1962 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
234301
| MD | Prince George's | Muirkirk, Twin Ponds | 1963 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |