Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
156036
| OR | Benton | Corvallis | 1995 |
17090003
| Upper Willamette | unknown |
156038
| OR | Coos | Coos Bay | 1995 |
17100304
| Coos | unknown |
156039
| OR | Douglas | pond near Roseburg | 1995 |
17100302
| South Umpqua | unknown |
115691
| OR | Lane | Coast Fork Willamette River, approximately 1 mile east of Eugene | 1993 |
17090003
| Upper Willamette | unknown |
115692
| OR | Lane | Eugene [unidentified waterbody] | 1993 |
17090003
| Upper Willamette | unknown |
851573
| OR | Lane | Eugene East | 2011 |
17090003
| Upper Willamette | established |
156037
| OR | Lane | Springfield | 1995 |
17090003
| Upper Willamette | unknown |
1712976
| OR | Linn | Pasture near Harrisburg, OR. Willamette River basin. | 2023 |
17090003
| Upper Willamette | |
156035
| OR | Multnomah | Portland | 1995 |
17090012
| Lower Willamette | unknown |
851572
| OR | Multnomah | Portland | 2011 |
17090012
| Lower Willamette | established |
851570
| OR | Multnomah | Washougal | 2011 |
17080001
| Lower Columbia-Sandy | established |
851571
| OR | Washington | Beaverton | 2008 |
17090010
| Tualatin | established |
851574
| OR | Washington | Beaverton | 2011 |
17090010
| Tualatin | established |