| Macrostomum viride (1) Beneden E, 1870 | 1913 or earlier | | | found in the country of Sweden. |
| Prorhynchus stagnalis Schultze, 1851 | 1913 or earlier | | | |
| Dalyellia expedita Hofsten N, 1907 | 1913 or earlier | | | |
| Dalyellia graffii (Hallez, 1878) | 1913 or earlier | | | in Lemna and Konferven. |
| Dalyellia cuspidata (Schmidt, 1861) | 1913 or earlier | 30-40 m | | pools and lakes. |
| Dalyellia infundibuliformis (Fuhrmann, 1894) | 1913 or earlier | | | |
| Dalyellia hallezii Graff, 1882 | 1913 or earlier | | | pools. |
| Castrella (Castrella) truncata (Abildgaard, 1789) | 1913 or earlier | | | ubiquitous, very active, prefers swimming at the surface of cold and warm, standing and flowing water. |
| Strongylostoma radiatum (Müller, 1774) | 1913 or earlier | | | ponds and lakes. |
| Strongylostoma elongatum Hofsten N, 1907 | 1913 or earlier | | | lakes in Sweden, up to 1980 m altitude. |
| Rhynchomesostoma rostratum (Müller, 1774) | 1913 or earlier | | | |
| Typhloplana viridata (Abildgaard, 1789) | 1913 or earlier | | | moors and lakes. |
| Typhloplana minima (Fuhrmann, 1894) | 1913 or earlier | | | |
| Castrada (Castrada) instructa Hofsten N, 1907 | 1911 or earlier | | | ponds and lakes. |
| Castrada (Castrada) lanceola (Braun, 1885) | 1913 or earlier | | | |
| Castrada (Castrada) hofmanni Braun, 1885 | 1913 or earlier | | | |
| Castrada (Castrada) quadridentata Hofsten N, 1907 | 1913 or earlier | 1 m | | In the larger lakes, and deeper lakes. |
| Castrada (Castrada) intermedia (Volz, 1898) | 1913 or earlier | | | |
| Castrada (Castrada) armata (Fuhrmann, 1894) | 1913 or earlier | | | mud of pools and lakes, and littoral zone. |
| Castrada (Castrada) neocomensis Volz, 1898 | 1913 or earlier | | | |
| Mesostoma lingua (Abildgaard, 1789) | 1913 or earlier | | | mud and detritus, of pools, ponds and lakes. |
| Bothromesostoma personatum (Schmidt, 1848) | 1913 or earlier | | | |
| Bothromesostoma essenii Braun, 1885 | 1913 or earlier | | | |
| Planaria torva (Müller, 1773) | 1892 or earlier | | | Schweden: Uppland. |
| Dugesia lugubris (Schmidt, 1861) | 1923 or earlier | | | Übrige Verbreitung der Kollektivart. Brittische Inseln, Mittel- u. Südschweden, Dänemark, ganz West- u. Mitteleuropa, Lettland. Littauen, Polen, Tschechoslovakei, Ungarn, ..... |
| Strongylostoma elongatum elongatum Hofsten N, 1907 | 1916 or earlier | | | Schweden (nicht im nordschwed) |