Species: Fragilaria crotonensis
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Akersvannet | Vestfold, Norway | 3 | 1 | 0 | 1994-09-20 | |
| Bergvikvatnet | Nordland, Norway | 1 | 1 | 0 | 1991-09-06 | |
| Borrevannet | Vestfold, Norway | 1 | 1 | 0 | 2003-05-19 | |
| Dælivannet | Akershus, Norway | 1 | 1 | 0 | 1991-09-07 | |
| Elgtjern | Trøndelag, Norway | 2 | 1 | 0 | 1990-05-25 | |
| Floen | Vestland, Norway | 1 | 1 | 0 | 1991-10-07 | |
| Frøylandsvatnet | Rogaland, Norway | 7 | 1 | 0 | 1994-09-28 | |
| Granavatnet | Trøndelag, Norway | 2 | 1 | 0 | 1991-05-28 | |
| Hammervatnet | Trøndelag, Norway | 5 | 1 | 0 | 1994-06-18 | |
| Harestuvannet | Akershus, Norway | 1 | 1 | 0 | 2005-08-30 | |
| Hjørungdalsvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1991-10-23 | |
| Hostadvatnet | Møre og Romsdal, Norway | 2 | 1 | 0 | 1990-09-18 | |
| Jarenvannet | Innlandet, Norway | 5 | 1 | 0 | 1996-09-18 | |
| Kjemsjøen | Innlandet, Norway | 1 | 1 | 0 | 1990-09-17 | |
| Klevatn | Nordland, Norway | 1 | 1 | 0 | 1993-09-07 | |
| Kolbotnvannet | Akershus, Norway | 5 | 1 | 0 | 1991-06-03 | |
| Kvitblikkvannet | Nordland, Norway | 1 | 1 | 0 | 1990-06-06 | |
| Lianvatnet | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-04 | |
| Liavatnet | Vestland, Norway | 1 | 1 | 0 | 1994-06-06 | |
| Litlevatn | Møre og Romsdal, Norway | 1 | 1 | 0 | 1994-04-27 | |
| Maltjern | Akershus, Norway | 1 | 1 | 0 | 1991-06-12 | |
| Midsjøvannet | Akershus, Norway | 1 | 1 | 0 | 1993-09-19 | |
| Mosvatnet | Rogaland, Norway | 6 | 1 | 0 | 1994-09-28 | |
| Myklebustvannet | Møre og Romsdal, Norway | 2 | 1 | 0 | 1991-06-03 | |
| Sagtjernet | Innlandet, Norway | 1 | 1 | 0 | 1991-05-31 | |
| Semsvannet | Akershus, Norway | 1 | 1 | 0 | 1989-09-21 | |
| Sillongen | Innlandet, Norway | 2 | 1 | 0 | 1990-05-22 | |
| Spildervatnet | Nordland, Norway | 2 | 1 | 0 | 1994-06-02 | |
| Stavsjø | Innlandet, Norway | 9 | 1 | 0 | 1991-10-14 | |
| Storvannet | Nordland, Norway | 2 | 1 | 0 | 1990-09-07 | |
| Sælenvannet | Vestland, Norway | 1 | 1 | 0 | 1989-11-08 | |
| Tornesvatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-09-07 | |
| Vasslivatnet | Rogaland, Norway | 1 | 1 | 0 | 1990-10-04 | |
| Vålåsjøen | Innlandet, Norway | 1 | 1 | 0 | 1989-08-24 | |
| Øksnevadtjørna | Rogaland, Norway | 1 | 1 | 0 | 1993-05-25 | |
| Årungen | Akershus, Norway | 7 | 1 | 0 | 1996-09-16 | |