Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
246179
| OR | Columbia | Clatskanie Slough | 2003 |
17080003
| Lower Columbia-Clatskanie | collected |
242682
| OR | Columbia | Clatskanie Slough - Beaver Slough and Beaver Dredge Cut | 2003 |
17080003
| Lower Columbia-Clatskanie | established |
237315
| OR | Columbia | Columbia River, lower | 2005 |
17080003
| Lower Columbia-Clatskanie | established |