Species: Tårnsnegl (Turritella communis)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Bragdøya | Agder, Norway | 3 | 1 | 0 | 1994-05-27 | |
| Helgeroafjorden | Vestfold, Norway | 1 | 1 | 0 | 1993-12-08 | |
| Nordåsvannet | Vestland, Norway | 1 | 1 | 0 | 2010-09-22 | |
| Refsnesstranda | Østfold, Norway | 1 | 1 | 0 | 2014-08-27 | |
| Rolfsbukta, Fornebu | Akershus, Norway | 1 | 1 | 0 | 2010-08-25 | |
| Vestre Åmøy | Rogaland, Norway | 1 | 1 | 0 | 1993-10-11 |