| Pseudamussium septemradiatum | | 2019-09-18 | 2019-09-18 |  | Kvaløysletta (Troms, Norway) |
| Pseudamussium septemradiatum | | 2019-09-18 | 2019-09-18 | | Kvaløysletta (Troms, Norway) |
| Pseudamussium septemradiatum | | 2016-10-23 | 2016-10-23 | | Drøbak (Akershus, Norway) |
| Pseudamussium septemradiatum | | 2016-10-23 | 2016-09-21 | | Drøbak (Akershus, Norway) |
| Pseudamussium septemradiatum | | 2016-09-24 | 2016-09-21 | | Drøbak (Akershus, Norway) |
| Pseudamussium septemradiatum | | 2016-09-23 | 2016-09-23 | | Drøbak (Akershus, Norway) |
| Pseudamussium septemradiatum | | 2015-10-07 | 2015-10-07 | | Drøbak (Akershus, Norway) |
| Pseudamussium septemradiatum | | 2015-10-07 | 2015-10-07 | | Drøbak (Akershus, Norway) |
| Pseudamussium septemradiatum | | 2014-10-16 | 2014-10-15 | | Drøbak (Akershus, Norway) |
| Pseudamussium septemradiatum | | 2014-04-29 | 2014-04-22 | | Drøbak (Akershus, Norway) |
| Pseudamussium septemradiatum | | 2013-03-20 | 2013-03-20 | | Arendal (Agder, Norway) |
| Pseudamussium septemradiatum | | 2004-05-14 | 2004-05-04 | | Drøbak (Akershus, Norway) |