| Childia groenlandica (Levinsen, 1879) | Jun to Aug, 1935 | 34-36 m | grey gyttja (A nutrient-rich sedimentary peat consisting mainly of plankton, other plant and animal residues, and mud) | repeatedly found in the months of June through August 1935. Bottom temperature 2.7, 3.8, and 5.6 degrees C. |
| Mecynostomum lutheri (Westblad, 1946) | Aug 1, 1936 | 34 m | gray clay Gyttja | |
| Convoluta saliens (Graff, 1882) | prior 1960 | 34-36 m | | |
| Archilopsis unipunctata (Fabricius, 1826) | prior to 1960 | 32-36 m | grey gyttja | |
| Promesostoma balticum Luther, 1918 | prior to 1943 | 20-30 m | | in the soil. |
| Brinkmanniella macrostomoides Luther, 1948 | 1962 or earlier | | | |
| Coronhelmis multispinosus Luther, 1948 | 1962 or earlier | 20 m | | north of Långholmen and Kvarnskär |
| Plagiostomum lemani Forel & Du Plessis, 1874 | 1960 or earlier | 5-54 m | Gyttja | Zostera-wiese in etwa 5 m auf sandigem Boden südl. v. >>Klobben; unterhalb der Vegetationszone lebt sie auf Gyttjaboden bis 54 m Tiefe (Tvärminne Storfjärd). |