| Cheliplanilla caudata Meixner, 1938 | 1956 or earlier | 3.0 m | fine sand | Swedish Baltic coast, pure fine sand. |
| Convoluta saliens (Graff, 1882) | prior to 1960 | 5 m | | Skane Ahus (Karline) |
| Dolichomacrostomum uniporum Luther, 1947 | prior to 1960 | 1.0 m | fine sand | Skane. |
| Macrostomum balticum Luther, 1947 | prior to 1960 | 3-5 m | fine sand | |
| Provortex tubiferus Luther, 1948 | 1962 or earlier | | | (K.) |
| Tvaerminnea karlingi Luther, 1943 | 1962 or earlier | 3 m | fine sand | Karling. |
| Haloplanella obtusituba Luther, 1946 | 1963 or earlier | 3 m | | Schweden. Skåne, Åhus, Finesand.(K) [Karling] |
| Thalassoplanella collaris Luther, 1946 | 1963 or earlier | | | Skåne, Åhus u. Malmö. |
| Cicerina tetradactyla Giard, 1904 | 1963 or earlier | | | Åhus. |
| Paracicerina maristoi Karling, 1952 | 1974 or earlier | | | Schwedische Ostseeküste. Nynaeshamn, Ahus. |
| Gnathorhynchus conocaudatus Meixner, 1929 | 1974 or earlier | 3 m | fine sand | Schwedische Ostseeküste, Ahus unter namen G. conocaudatus. Hierzu schreibt Karling (1974): "Imperfectly known, taxonomic delimination against G. conocaudatus uncertain." |
| Cheliplana stylifera Karling, 1949 | 1963 or earlier | | fine sand | Ahus. Feinsand. |
| Diascorhynchus serpens Karling, 1949 | 1963 or earlier | 3 m | fine sand | Schwedische Ostseeküste. Ahus. |