| Haploposthia rubra (An der Lan, 1936) | 1956 or earlier | 40 m | mud | |
| Haploposthia viridis (An der Lan, 1936) | 1956 or earlier | 20-60 m | | |
| Paraproporus rubescens Westblad, 1945 | 1956 or earlier | | | Grötö and Långholm. |
| Mecynostomum lutheri (Westblad, 1946) | 1956 or earlier | 10-15 m | Mud and clay with detritus | |
| Mecynostomum tenuissimum (Westblad, 1946) | 1956 or earlier | 30-125 m | | and Långholm. |
| Childia crassum (Westblad, 1942) | 1956 or earlier | 10-100 m | mud (Schlammböden) | and Långholm. |
| Childia submaculatum (Westblad, 1942) | 1956 or earlier | 20-40 m | | and Långholm. |
| Childia trianguliferum (Westblad, 1942) | 1956 or earlier | 10-40 m | | and Långholm. |
| Convoluta viridipunctata Westblad, 1946 | 1956 or earlier | 5-40 m | | |
| Gastropharynx limophilus Riedl, 1956 | 1956 or earlier | 20-40 m | mud (Schlammböden) with Sand | |
| Einarella argillophila Luther, 1948 | 1956 or earlier | 150 m | mud and clay | |
| Uncinorhynchus flavidus Karling, 1947 | 1956 or earlier | 40 m | mud | |