| Gyrinus opacus | | 1990-09-18 | 1990-09-18 | Stokkavatnet (Nordland, Norway) |  |
| Gyrinus opacus | | 1990-06-05 | 1990-06-05 | Jarenvannet (Innlandet, Norway) | |
| Gyrinus opacus | | 1994-10-04 | 1994-10-04 | Sagtjernet (Innlandet, Norway) | |
| Gyrinus opacus | | 1991-09-24 | 1991-09-24 | Sagtjernet (Innlandet, Norway) | |
| Gyrinus opacus | | 1990-06-25 | 1990-06-25 | Sagtjernet (Innlandet, Norway) | |
| Gyrinus opacus | | 1992-09-11 | 1992-09-11 | Vikerauntjønna (Trøndelag, Norway) | |
| Gyrinus opacus | | 1990-09-28 | 1990-09-28 | Vikerauntjønna (Trøndelag, Norway) | |
| Gyrinus opacus | | 1991-08-28 | 1991-08-28 | Kruktjønna (Trøndelag, Norway) | |
| Gyrinus opacus | | 1990-08-29 | 1990-08-29 | Kolbjørnviksjøen (Østfold, Norway) | |
| Gyrinus opacus | | 1990-05-31 | 1990-05-31 | Kolbjørnviksjøen (Østfold, Norway) | |
| Gyrinus opacus | | 1990-09-25 | 1990-09-25 | Gravdalsvatnet (Vestland, Norway) | |
| Gyrinus opacus | | 1990-10-23 | 1990-10-23 | Krussætertjern (Østfold, Norway) | |