Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
52368
| DC | District of Columbia | Potomac River in Georgetown, Washington, D.C. | 1974 |
02070010
| Middle Potomac-Anacostia-Occoquan | collected |
154945
| MD | Anne Arundel | Patuxent River | 1976 |
02060006
| Patuxent | collected |
52367
| MD | Montgomery | Chesapeake and Ohio Canal in Seneca, MD | 1974 |
02070008
| Middle Potomac-Catoctin | collected |
154943
| MD | Washington | Licking Creek | 1977 |
02070004
| Conococheague-Opequon | collected |
154944
| MD | Washington | Potomac River | 1976 |
02070004
| Conococheague-Opequon | collected |
154946
| MD | Wicomico | Rewastico Creek | 1976 |
02080109
| Nanticoke | collected |