Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
31041
| DC | | Potomac River, whole length | 1994 |
02070008
| Middle Potomac-Catoctin | established |
35135
| MD | | Potomac River, whole length | 1994 |
02070008
| Middle Potomac-Catoctin | established |
587465
| MD | Frederick | [No locality description provided by MARIS] | 1998 |
02070008
| Middle Potomac-Catoctin | established |
280349
| MD | Montgomery | Potomac River, in the vicinity of Plummers Island (including C&O canal). | 2009 |
02070008
| Middle Potomac-Catoctin | established |
587971
| VA | Loudoun | [No locality description provided by MARIS] | 1975 |
02070008
| Middle Potomac-Catoctin | unknown |
587972
| VA | Loudoun | [No locality description provided by MARIS] | 1978 |
02070008
| Middle Potomac-Catoctin | unknown |
587973
| VA | Loudoun | [No locality description provided by MARIS] | 2000 |
02070008
| Middle Potomac-Catoctin | unknown |
153376
| VA | Loudoun | Potomac drainage in Loudon County | 1994 |
02070008
| Middle Potomac-Catoctin | established |