Species: Stordamsnegl (Lymnaea stagnalis)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Dælivannet | Akershus, Norway | 3 | 1 | 0 | 1992-09-10 | |
| Gullerudtjern | Buskerud, Norway | 4 | 1 | 0 | 1992-09-19 | |
| Jaren skole | Innlandet, Norway | 1 | 1 | 0 | 2013-09-27 | |
| Jarenvannet | Innlandet, Norway | 7 | 1 | 0 | 1996-09-18 | |
| Langvannet | Akershus, Norway | 1 | 1 | 0 | 2002-05-23 | |
| Ledengstjern | Østfold, Norway | 1 | 1 | 0 | 1994-05-27 | |
| Midsjøvannet | Akershus, Norway | 1 | 1 | 0 | 1993-09-19 | |
| Rullestadtjern | Akershus, Norway | 1 | 1 | 0 | 1991-09-19 | |
| Sagtjernet | Innlandet, Norway | 4 | 1 | 0 | 1993-09-17 | |
| Skirstadtjernet | Innlandet, Norway | 1 | 1 | 0 | 2012-09-26 | |
| Stavsjø | Innlandet, Norway | 5 | 1 | 0 | 1993-06-07 | |
| Stikletjern | Østfold, Norway | 1 | 1 | 0 | 1995-06-06 | |
| Sætertjern | Akershus, Norway | 1 | 1 | 0 | 1996-10-24 | |
| Årungen | Akershus, Norway | 1 | 1 | 0 | 1993-09-22 | |