Species: Nordskivesnegl (Gyraulus acronicus)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Abbortjernet | Innlandet, Norway | 1 | 1 | 0 | 1989-08-22 | |
| Akersvannet | Vestfold, Norway | 1 | 1 | 0 | 1995-09-07 | |
| Apeltunvatnet | Vestland, Norway | 5 | 1 | 0 | 2009-06-10 | |
| Bogstadvannet | Oslo, Norway | 2 | 1 | 0 | 1994-06-06 | |
| Burudvann | Akershus, Norway | 1 | 1 | 0 | 1993-09-14 | |
| Fløyta | Akershus, Norway | 1 | 1 | 0 | 1992-06-12 | |
| Frøylandsvatnet | Rogaland, Norway | 6 | 1 | 0 | 1993-09-29 | |
| Granavatnet | Trøndelag, Norway | 5 | 1 | 0 | 1995-09-01 | |
| Gullerudtjern | Buskerud, Norway | 2 | 1 | 0 | 1990-09-26 | |
| Hammervatnet | Trøndelag, Norway | 11 | 1 | 0 | 1996-10-17 | |
| Harestuvannet | Akershus, Norway | 7 | 1 | 0 | 2004-09-01 | |
| Hauskjevatnet | Rogaland, Norway | 1 | 1 | 0 | 1990-05-28 | |
| Hegglandsvatnet | Vestland, Norway | 2 | 1 | 0 | 1993-06-02 | |
| Hjørungdalsvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1990-05-29 | |
| Ibestadvatnet | Troms, Norway | 2 | 1 | 0 | 1990-09-11 | |
| Kolbjørnviksjøen | Østfold, Norway | 3 | 1 | 0 | 1993-09-09 | |
| Koltjønna | Trøndelag, Norway | 3 | 1 | 0 | 1994-06-02 | |
| Korssjøen | Vestfold, Norway | 2 | 1 | 0 | 1996-09-09 | |
| Kverndammen | Telemark, Norway | 2 | 1 | 0 | 1992-10-14 | |
| Kvitblikkvannet | Nordland, Norway | 3 | 1 | 0 | 1993-09-02 | |
| Laupen | Innlandet, Norway | 4 | 1 | 0 | 1993-10-04 | |
| Lauvtjønna | Trøndelag, Norway | 1 | 1 | 0 | 1993-09-06 | |
| Ledengstjern | Østfold, Norway | 1 | 1 | 0 | 1994-05-27 | |
| Lianvatnet | Trøndelag, Norway | 5 | 1 | 0 | 1995-09-12 | |
| Liavatnet | Vestland, Norway | 1 | 1 | 0 | 1994-06-06 | |
| Ljøgodttjern | Akershus, Norway | 3 | 1 | 0 | 1993-08-30 | |
| Maltjern | Akershus, Norway | 1 | 1 | 0 | 1992-06-23 | |
| Midsjøvannet | Akershus, Norway | 1 | 1 | 0 | 1993-09-19 | |
| Mosvatnet | Rogaland, Norway | 3 | 1 | 0 | 1995-09-19 | |
| Nøklevann | Oslo, Norway | 1 | 1 | 0 | 1992-06-11 | |
| Raudsjøen | Trøndelag, Norway | 2 | 1 | 0 | 1993-09-15 | |
| Reinsvolldammen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Rullestadtjern | Akershus, Norway | 1 | 1 | 0 | 1991-09-19 | |
| Røyvannet | Telemark, Norway | 1 | 1 | 0 | 1993-09-10 | |
| Sagtjernet | Innlandet, Norway | 3 | 1 | 0 | 1993-09-17 | |
| Semsvannet | Akershus, Norway | 2 | 1 | 0 | 1994-05-18 | |
| Sennsjøen | Innlandet, Norway | 1 | 1 | 0 | 1996-09-10 | |
| 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 | |
| Storavatnet | Vestland, Norway | 4 | 1 | 0 | 1993-09-02 | |
| Sundkilen | Telemark, Norway | 1 | 1 | 0 | 1990-06-01 | |
| Sætertjern | Akershus, Norway | 2 | 1 | 0 | 1996-10-24 | |
| Tjennane | Telemark, Norway | 1 | 1 | 0 | 1995-05-30 | |
| Tornesvatnet | Rogaland, Norway | 3 | 1 | 0 | 1993-09-14 | |
| Tveitevannet | Vestland, Norway | 2 | 1 | 0 | 1990-08-28 | |
| Vasslivatnet | Rogaland, Norway | 2 | 1 | 0 | 1992-06-04 | |
| Øksnevadtjørna | Rogaland, Norway | 1 | 1 | 0 | 1993-05-28 | |
| Ørsjøen | Innlandet, Norway | 1 | 1 | 0 | 1995-09-07 | |
| Årungen | Akershus, Norway | 5 | 1 | 0 | 1996-09-16 | |