Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1320980
| MD | Cecil | Elk River near the boat ramp at Elk Neck State Park | 2014 |
02060002
| Chester-Sassafras | established |
213421
| MD | Cecil | Northeast River, mouth of river | 1990 |
02060002
| Chester-Sassafras | established |
1428118
| MD | Cecil | Rogues Harbor, Elk River | 2017 |
02060002
| Chester-Sassafras | established |
1428099
| MD | Cecil | Rogues Harbor, Elk River | 2017 |
02060002
| Chester-Sassafras | established |
1320979
| MD | Kent | Chesapeake Bay at Andelot Farm Andelot Farm near Worton | 2014 |
02060002
| Chester-Sassafras | established |
232513
| MD | Kent | Galena, in streams | 1877 |
02060002
| Chester-Sassafras | established |
244299
| PA | Chester | 2.28 km ENE of Lewisville, White Clay Creek Preserve, Big Elk Creek at Stirckersville Road Bridge | 2012 |
02060002
| Chester-Sassafras | established |