Tetraedron sp.
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Kjemsjøen | Innlandet, Norway | 1 | 1 | 0 | 1991-06-10 | |
| Kolbotnvannet | Akershus, Norway | 1 | 1 | 0 | 1991-06-03 | |
| Stavsjø | Innlandet, Norway | 1 | 1 | 0 | 1991-10-14 | |
| Svartaholtjørnet | Vestland, Norway | 1 | 1 | 0 | 1991-05-23 |