Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
228439
| VA | King George | Potomac River | 1985 |
02070011
| Lower Potomac | established |
1409751
| VA | Stafford | Brent Marsh, 1.5 mi S of Widewater | 1987 |
02070011
| Lower Potomac | unknown |
229417
| VA | Stafford | Brent Marsh, along the western shore of Potomac River, 2 mi south of Widewater, intertidal zone in open water in bottom of depressions subtending tidal marsh, | 1994 |
02070011
| Lower Potomac | established |