Subfamily: Orthocladiinae
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|
| Svartåstjern | Buskerud, Norway | 1 | 1 | 0 | 1993-06-03 | |
| Tinnhølen | Vestland, Norway | 1 | 1 | 2 | 2008-06-22 | |
| Tornesvatnet | Rogaland, Norway | 6 | 6 | 0 | 1991-05-30 | |
| Tretjønnet | Agder, Norway | 1 | 1 | 0 | 1989-09-27 | |
| Tussvatnet | Nordland, Norway | 4 | 4 | 0 | 1990-06-07 | |
| Tveitavatnet | Vestland, Norway | 1 | 1 | 0 | 1991-05-23 | |
| Tveitevannet | Vestland, Norway | 1 | 1 | 0 | 1989-08-25 | |
| Vasslivatnet | Rogaland, Norway | 1 | 1 | 0 | 1990-10-04 | |
| Vålåsjøen | Innlandet, Norway | 1 | 1 | 0 | 1990-09-07 | |
| Øksnevadtjørna | Rogaland, Norway | 2 | 1 | 0 | 1993-05-28 | |
| Øvre Storfjordvatnet | Nordland, Norway | 8 | 8 | 0 | 1990-05-29 | |
| Årungen | Akershus, Norway | 1 | 1 | 0 | 1989-09-20 | |
| Åstveitvannet | Vestland, Norway | 3 | 3 | 0 | 1989-09-07 | |
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