Species (sp.): Rhizosolenia sp.
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Bergvikvatnet | Nordland, Norway | 2 | 1 | 0 | 1990-06-06 | |
| Fløyta | Akershus, Norway | 1 | 1 | 0 | 1990-06-07 | |
| Hegglandsvatnet | Vestland, Norway | 1 | 1 | 0 | 1991-09-12 | |
| Sagtjernet | Innlandet, Norway | 1 | 1 | 0 | 1991-05-31 |