Genus: Zygnema
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Elgtjern | Trøndelag, Norway | 1 | 1 | 0 | 1989-10-27 | |
| Laksådalsvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-20 | |
| Laupen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-27 | |
| Lauvtjønna | Trøndelag, Norway | 1 | 1 | 0 | 1990-05-30 | |
| Litlvatnet | Trøndelag, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Longvatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-09-06 | |
| Myklebustvannet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1990-06-08 | |
| Reinsvolldammen | Innlandet, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Rossevatn | Rogaland, Norway | 1 | 1 | 0 | 1989-09-06 | |
| Røldalstjørnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-14 | |
| Skarvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Skjelbreidvatnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-13 | |
| Spildervatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-20 | |
| Stokkavatnet | Nordland, Norway | 1 | 1 | 0 | 1990-09-18 | |
| Svanevatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-09-04 | |
| Øvre Storfjordvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-01 | |