Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
35169
| MD | | Blue Ridge, ridge and valley, Great Valley | 1976 |
02070009
| Monocacy | established |
35170
| MD | | coastal plain of southern Maryland | 1976 |
02040303
| Chincoteague | established |
268192
| MD | | Upper Chesapeake (HUC6) non-specific | 1981 |
02060000
| Upper Chesapeake | established |
1403174
| MD | | Youghiogheny drainage | 1995 |
05020006
| Youghiogheny | established |
549660
| MD | Allegany | Sideling Hill Creek | 1998 |
02070003
| Cacapon-Town | unknown |
549665
| MD | Allegany | Sideling Hill Creek, Near Cumberland, Md | 1998 |
02070003
| Cacapon-Town | unknown |
549663
| MD | Frederick | Monocacy River, Thurmont, Md. | 1998 |
02070009
| Monocacy | unknown |
549662
| MD | Frederick | Monocacy River. | 1998 |
02070009
| Monocacy | unknown |
1673891
| MD | Montgomery | [No locality description provided] | 2012 |
02070008
| Middle Potomac-Catoctin | |
1671209
| MD | Montgomery | [No locality description provided] | 2013 |
02070008
| Middle Potomac-Catoctin | |
1739423
| MD | Montgomery | [No locality description provided] | 2024 |
02070008
| Middle Potomac-Catoctin | |
746334
| MD | Montgomery | Potomac River, 0.7 mile reach from E end of Swainsons Island upstream to head of Plummers Island and I-495 bridge, SW edge of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | unknown |
549666
| MD | Montgomery | Potomac River, Plummer's Island, 0.25 miles below I-495, SW of Bethesda | 1995 |
02070008
| Middle Potomac-Catoctin | unknown |
280480
| MD | Montgomery | Potomac River, side channels on N side of Swainsons Island, ca. 0.5 miles downstream (E of) I-495 crossing, SW side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | established |
746350
| MD | Montgomery | Potomac River, side channels on N side of Swainsons Island, ca. 0.5 miles downstream (E of) I-495 crossing, SW side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | unknown |
280477
| MD | Montgomery | Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | established |
746349
| MD | Montgomery | Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | unknown |
157934
| MD | Washington | Chesapeake and Ohio Canal National Historical Park | 1999 |
02070004
| Conococheague-Opequon | established |
549661
| MD | Washington | Hagerstown, Md | 1998 |
02070004
| Conococheague-Opequon | unknown |
549664
| MD | Washington | Licking Creek | 1998 |
02070004
| Conococheague-Opequon | unknown |
549659
| MD | Washington | Side Ling Creek, Cumberland. Coordinates From Gps | 1997 |
02070003
| Cacapon-Town | unknown |