| Childia groenlandica (Levinsen, 1879) | prior to 1975 | 10-15 m | | |
| Childia cycloposthium (Westblad, 1942) | prior 1975 | | | |
| Paraproporus rubescens Westblad, 1945 | prior 1975 | 10-15 m | | |
| Paraproporus rubescens Westblad, 1945 | 1953 or earlier | 10-15 m | | |
| Childia groenlandica (Levinsen, 1879) | 1953 or earlier | 20 m | mud and sand with detritus | |
| Childia groenlandica (Levinsen, 1879) | 1953 or earlier | 10-15 m | mud and sand with detritus | |
| Mecynostomum agile Jensen, 1878 | 1956 or earlier | 17 m | | southern. |
| Mecynostomum agile Jensen, 1878 | 1956 or earlier | 19 m | | middle. |
| Hallangia proporoides Westblad, 1946 | 1953 or earlier | | | |
| Myozonaria bistylifera Rieger, 1968 | Aug 1967 | 2-3 m | sand | common in the Mediterranean. in Seegrass meadows. |
| Convoluta schultzii Schmidt, 1852 | 1933 or earlier | 20 m | | Zostera |
| Plagiostomum girardi (Schmidt, 1857) | 1933 or earlier | 20 m | | Zostera. |
| Vorticeros auriculatum (Müller, 1784) | 1933 or earlier | 20 m | | in Zostera-Rasen. |
| Stylostomum ellipse (Dalyell, 1853) | 1933 or earlier | 20 m | | in Zostera-Rasen. |
| Rogneda westbladi westbladi Ax, 1956 | 1953 or earlier | 4-35 m | sand, loam | |