Subclass: Palaeoheterodonta
| Year | Arter/grupper | Localities | Participants | Observations |
|---|---|---|---|---|
| 2019 | 1 | 1 | 1 | 1 |
| 2012 | 1 | 1 | 1 | 1 |
| 2011 | 1 | 1 | 1 | 1 |
| 2010 | 1 | 1 | 1 | 1 |
| 2007 | 1 | 3 | 3 | 3 |
| 1994 | 1 | 1 | 1 | 1 |
| 1992 | 1 | 1 | 1 | 1 |
| 1990 | 1 | 1 | 1 | 1 |
| 1989 | 1 | 1 | 1 | 1 |
| Totalt alle år | 2 | 11 | 11 | 11 |
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Responsible editor: Doris Jorde