Family: Unionidae
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Dælivannet | Akershus, Norway | 1 | 1 | 0 | 1990-09-03 | |
| Ledengstjern | Østfold, Norway | 1 | 1 | 0 | 1994-05-27 | |
| Stavsjø | Innlandet, Norway | 1 | 1 | 0 | 1989-09-05 | |
| Sverigetjern | Akershus, Norway | 1 | 1 | 0 | 2019-06-05 | |
| Årungen | Akershus, Norway | 1 | 1 | 0 | 2010-06-10 |
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