Phylum: Flat worms and Ribbon worms (Platyhelminthes)
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2021 | 1 | 1 | 1 | 1 |
| 2018 | 2 | 2 | 2 | 4 |
| 2017 | 1 | 1 | 1 | 1 |
| 2016 | 1 | 1 | 1 | 1 |
| 2015 | 1 | 4 | 4 | 5 |
| 2014 | 1 | 5 | 4 | 8 |
| 2013 | 1 | 6 | 7 | 13 |
| 2012 | 1 | 1 | 3 | 4 |
| 2011 | 1 | 2 | 2 | 3 |
| 2010 | 1 | 1 | 1 | 1 |
| 2009 | 1 | 1 | 1 | 1 |
| 2008 | 1 | 2 | 2 | 2 |
| 2007 | 1 | 2 | 2 | 2 |
| 2006 | 1 | 2 | 2 | 4 |
| 2005 | 1 | 2 | 2 | 3 |
| 2004 | 1 | 2 | 2 | 2 |
| 2003 | 1 | 1 | 1 | 1 |
| 2002 | 2 | 2 | 2 | 4 |
| 2001 | 4 | 2 | 2 | 9 |
| 2000 | 1 | 1 | 1 | 1 |
| 1989 | 2 | 9 | 9 | 11 |
| Totalt alle år | 6 | 36 | 37 | 81 |