Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
213515
| DC | District of Columbia | Potomac River, freshwater tidal zone. | 1923 |
02070010
| Middle Potomac-Anacostia-Occoquan | eradicated |
228427
| MD | Charles/Prince G | Potomac River | 1923 |
02070010
| Middle Potomac-Anacostia-Occoquan | eradicated |
860823
| MD | Prince George's | Potomac River, near Oxon Run | 1923 |
02070010
| Middle Potomac-Anacostia-Occoquan | eradicated |