| Nemertoderma sp. Westblad, 1937 | 1956 or earlier | | mud | |
| Mecynostomum agile Jensen, 1878 | 1956 or earlier | 29 m | | |
| Mecynostomum agile Jensen, 1878 | 1956 or earlier | 31 m | | |
| Mecynostomum minimum (Westblad, 1946) | 1956 or earlier | up to 25 m | | |
| Mecynostomum tenuissimum (Westblad, 1946) | 1956 or earlier | 10-40 m | | |
| Childia crassum (Westblad, 1942) | 1956 or earlier | 30-40 m | mud (Schlammböden) | |
| Childia dubium (Westblad, 1942) | 1956 or earlier | 30-40 m | | |
| Convoluta viridipunctata Westblad, 1946 | 1956 or earlier | 19-31 m | | |
| Plagiostomum ponticum Pereyaslawzewa, 1892 | 1956 or earlier | ebb tide level to 30 m | mud (Schlammböden) | Phytal and mud. |
| Vejdovskya suecica Luther, 1948 | 1956 or earlier | 20-40 m | mud, sand, detritus | |
| Hangethellia calceifera Karling, 1940 | 1956 or earlier | 30 - 40 m | mud, sand, detritus | |
| Westbladiella tubifera Riedl, 1956 | 1956 or earlier | 30-40 m | mud and clay (Schlammtonböden) | |
| Promesostoma solea (Schmidt, 1857) | 1956 or earlier | 30 m | mud, clay (Schlammböden) | |
| Trisaccopharynx armatus Riedl, 1956 | 1956 or earlier | 20-40 m | sand, detritus loam | |
| Rogneda westbladi Karling, 1953 | 1956 or earlier | 4-40 m | mud loam | |
| Uncinorhynchus flavidus Karling, 1947 | 1956 or earlier | 30 m | mud | |
| Monotoplana diorchis Meixner, 1938 | 1956 or earlier | 18- 150 m | mud, clay (Schlammböden) | |
| Childia groenlandica (Levinsen, 1879) | 1956 or earlier | | | |
| Anaperus rubellus Westblad, 1945 | 1956 or earlier | | | |