Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1405329
| MD | Anne Arundel | Maryland, Anne Arundel County, Smithsonian Environmental Research Center (SERC) beaver pond | 2011 |
02060004
| Severn | established |
1405330
| MD | Anne Arundel | Maryland, Anne Arundel County, Smithsonian Environmental Research Center (SERC) beaver pond | 2011 |
02060004
| Severn | established |
1405331
| MD | Anne Arundel | Maryland, Anne Arundel County, Smithsonian Environmental Research Center (SERC) beaver pond | 2011 |
02060004
| Severn | established |
1405527
| MD | Anne Arundel | Maryland, Anne Arundel County, Smithsonian Environmental Research Center (SERC) beaver pond | 2011 |
02060004
| Severn | established |
1405528
| MD | Anne Arundel | Maryland, Anne Arundel County, Smithsonian Environmental Research Center (SERC) beaver pond | 2011 |
02060004
| Severn | established |
280470
| MD | Charles | Potomac River, Mattawoman Creek tidal embayment, ca. 2.2 miles of lower reach from Smallwood State Park area upstream to above mouth of Marbury Run, 3.1-1.1 air miles SW-S center Indian Head | 2011 |
02070011
| Lower Potomac | established |
746321
| MD | Charles | Potomac River, Mattawoman Creek tidal embayment, ca. 2.2 miles of lower reach from Smallwood State Park area upstream to above mouth of Marbury Run, 3.1-1.1 air miles SW-S center Indian Head | 2011 |
02070011
| Lower Potomac | established |