Species: Heterotrissocladius marcidus
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Arkavatnet | Rogaland, Norway | 1 | 1 | 0 | 1989-08-28 | |
| Buvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1990-05-29 | |
| Gravdalsvatnet | Vestland, Norway | 1 | 1 | 0 | 1989-09-18 | |
| Hjørungdalsvatnet | Møre og Romsdal, Norway | 1 | 1 | 0 | 1991-10-23 | |
| Krussætertjern | Østfold, Norway | 1 | 1 | 0 | 1989-09-15 | |
| Tussvatnet | Nordland, Norway | 1 | 1 | 0 | 1990-06-07 | |
| Øvre Storfjordvatnet | Nordland, Norway | 1 | 1 | 0 | 1989-09-01 | |
| Åstveitvannet | Vestland, Norway | 1 | 1 | 0 | 1989-09-07 |