Species: Trådtjernaks (Stuckenia filiformis)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Fetvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-29 | |
| Hostadvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1992-09-08 | |
| Liavatnet | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-19 | |
| Storvatnet | Trøndelag, Norway | 1 | 1 | 0 | 2004-08-14 |
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