Species: Gerris argentatus
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Jåbekkvannet | Agder, Norway | 1 | 1 | 0 | 1991-09-16 | |
| Kolbjørnviksjøen | Østfold, Norway | 1 | 1 | 0 | 1990-08-29 | |
| Sætertjern | Akershus, Norway | 1 | 1 | 0 | 1996-10-24 | |
| Øymarksjøen | Østfold, Norway | 1 | 1 | 0 | 1997-05-29 |