Species: Rhizosolenia longiseta
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Klevatn | Nordland, Norway | 1 | 1 | 0 | 1993-09-07 | |
| Molbekktjernet | Østfold, Norway | 1 | 1 | 0 | 1989-09-04 | |
| Sagtjernet | Innlandet, Norway | 3 | 1 | 0 | 1994-10-04 | |
| Øvre Storfjordvatnet | Nordland, Norway | 2 | 1 | 0 | 1990-05-29 |