Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
271927
| MD | Prince George's | Potomac River near Fort Washington | 2010 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
848983
| MD | Prince George's | Potomac River near Fort Washington | 2012 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
859909
| MD | Prince George's | Potomac River near Fort Washington | 2015 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |