| Vejdovskya ignava Ax, 1951 | 1962 or earlier | 3-4 m | coarse sand | pure coarse sand, Zostera.  Karling. | 
| Balgetia semicirculifera Karling, 1962 | 1962 or earlier | 3-4 m | coarse sand |  | 
| Balgetia hyalina Karling, 1962 | 1962 or earlier | 3-4 m | coarse sand | Karling. | 
| Placorhynchus octaculeatus Karling, 1931 | Aug 1929 - Mar 1930 |  | sand | shallow bay. | 
| Gyratrix hermaphroditus Ehrenberg, 1831 | Aug 1929 - Mar 1930 |  |  | near the beach. | 
| Acrorhynchus robustus Karling, 1931 | Jun 1929 |  |  | shallow bay south of Hangöudd. | 
| Cheliplana stylifera Karling, 1949 | Sep 9, 1936 | 3-4 m | coarse sand | Sand with Zostera. | 
| Neognathorhynchus lobatus (Ax, 1952) | 1956 or earlier |  |  | Finnischer Meerbusen.  Balget bei Tvärminne, | 
| Haloplanella curvistyla Luther, 1946 | 1963 or earlier |  | Feinsand | Feinsand mit Zostera. |