Genus: Xanthidium
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Litlvatnet | Trøndelag, Norway | 2 | 1 | 0 | 1996-09-06 | |
| Raudsjøen | Trøndelag, Norway | 2 | 1 | 0 | 1990-08-31 | |
| Rossevatn | Rogaland, Norway | 2 | 2 | 0 | 1993-05-25 | |
| Rundvannet | Troms, Norway | 1 | 1 | 0 | 1991-06-18 | |
| Rørvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1993-06-19 | |
| Sennsjøen | Innlandet, Norway | 1 | 1 | 0 | 1996-09-10 | |
| Skjelbreidvatnet | Vestland, Norway | 1 | 1 | 0 | 1990-09-18 | |
| Spildervatnet | Nordland, Norway | 2 | 2 | 0 | 1993-06-11 | |
| Svartaholtjørnet | Vestland, Norway | 3 | 2 | 0 | 1993-09-17 | |
| Svartåstjern | Buskerud, Norway | 2 | 1 | 0 | 1990-09-24 | |
| Tømmervatnet | Troms, Norway | 1 | 1 | 0 | 1994-09-16 | |
| Øvre Storfjordvatnet | Nordland, Norway | 3 | 2 | 0 | 1991-09-04 | |