Species: Vanlig damsnegl (Lymnaea peregra)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Myklebustvannet | Møre og Romsdal, Norway | 3 | 1 | 0 | 1990-09-13 | |
| Nøklevann | Oslo, Norway | 2 | 1 | 0 | 1990-06-05 | |
| Reinsvolldammen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Rossevatn | Rogaland, Norway | 9 | 1 | 0 | 1993-09-20 | |
| Rullestadtjern | Akershus, Norway | 1 | 1 | 0 | 1991-09-19 | |
| Rørvatnet | Møre og Romsdal, Norway | 5 | 1 | 0 | 1995-09-05 | |
| Sagtjernet | Innlandet, Norway | 4 | 1 | 0 | 1993-09-17 | |
| Seljebøvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1994-06-13 | |
| Semsvannet | Akershus, Norway | 1 | 1 | 0 | 1994-05-18 | |
| Sennsjøen | Innlandet, Norway | 1 | 1 | 0 | 1996-09-10 | |
| Sillongen | Innlandet, Norway | 1 | 1 | 0 | 1990-09-19 | |
| Skirstadtjernet | Innlandet, Norway | 1 | 1 | 0 | 2012-09-26 | |
| Spildervatnet | Nordland, Norway | 2 | 1 | 0 | 1993-06-10 | |
| Stavsjø | Innlandet, Norway | 2 | 1 | 0 | 1990-09-29 | |
| Steglevannet | Buskerud, Norway | 1 | 1 | 0 | 1989-10-06 | |
| Stikletjern | Østfold, Norway | 2 | 1 | 0 | 1996-08-19 | |
| Stokkavatnet | Nordland, Norway | 1 | 1 | 0 | 1990-09-18 | |
| Stokkavatnet | Rogaland, Norway | 2 | 1 | 0 | 2001-05-07 | |
| Storavatnet | Vestland, Norway | 5 | 1 | 0 | 1993-09-02 | |
| Storeidvatnet | Nordland, Norway | 1 | 1 | 0 | 1998-09-07 | |
| Sundkilen | Telemark, Norway | 1 | 1 | 0 | 1990-06-01 | |
| Sætertjern | Akershus, Norway | 1 | 1 | 0 | 1990-09-12 | |
| Tornesvatnet | Rogaland, Norway | 3 | 1 | 0 | 1993-09-14 | |
| Tretjønnet | Agder, Norway | 2 | 1 | 0 | 1990-06-26 | |
| Tussvatnet | Nordland, Norway | 2 | 1 | 0 | 1990-06-07 | |
| Tveitavatnet | Vestland, Norway | 4 | 1 | 0 | 1992-10-01 | |
| Vasslivatnet | Rogaland, Norway | 1 | 1 | 0 | 1992-06-04 | |
| Vikerauntjønna | Trøndelag, Norway | 3 | 1 | 0 | 1993-09-15 | |
| Vålåsjøen | Innlandet, Norway | 4 | 1 | 0 | 1993-06-09 | |
| Ørsjøen | Innlandet, Norway | 1 | 1 | 0 | 1995-09-07 | |
| Øvre Storfjordvatnet | Nordland, Norway | 2 | 1 | 0 | 1990-08-30 | |
| Årungen | Akershus, Norway | 6 | 1 | 0 | 1996-09-16 | |
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