Species: Remskivesnegl (Bathyomphalus contortus)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2006 | 1 | 1 | 1 | 1 |
| 2002 | 1 | 1 | 1 | 1 |
| 1996 | 1 | 2 | 2 | 3 |
| 1995 | 1 | 3 | 3 | 4 |
| 1994 | 1 | 1 | 1 | 1 |
| 1993 | 1 | 6 | 6 | 6 |
| 1992 | 1 | 5 | 6 | 7 |
| 1991 | 1 | 2 | 2 | 2 |
| 1990 | 1 | 7 | 7 | 8 |
| 1989 | 1 | 5 | 5 | 5 |
| Totalt alle år | 1 | 21 | 21 | 38 |