Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1672577
| MD | Charles | [No locality description provided] | 2019 |
02070011
| Lower Potomac | |
747002
| 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 |
280535
| 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 |
613207
| MD | Charles | Zekiak Swamp Run | 1998 |
02070011
| Lower Potomac | established |