Species: Gyrinus opacus
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 1994 | 1 | 1 | 1 | 1 |
| 1992 | 1 | 1 | 1 | 1 |
| 1991 | 1 | 2 | 2 | 2 |
| 1990 | 1 | 7 | 7 | 8 |
| Totalt alle år | 1 | 8 | 8 | 12 |
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 1994 | 1 | 1 | 1 | 1 |
| 1992 | 1 | 1 | 1 | 1 |
| 1991 | 1 | 2 | 2 | 2 |
| 1990 | 1 | 7 | 7 | 8 |
| Totalt alle år | 1 | 8 | 8 | 12 |