| Macrostomum viride (1) | 1913 or earlier | | | found in the country of Sweden. |
| Prorhynchus stagnalis | 1913 or earlier | | | |
| Dalyellia expedita | 1913 or earlier | | | |
| Dalyellia graffi | 1913 or earlier | | | in Lemna and Konferven. |
| Dalyellia cuspidata | 1913 or earlier | 30-40 m | | pools and lakes. |
| Dalyellia infundibuliformis | 1913 or earlier | | | |
| Dalyellia hallezi (4) | 1913 or earlier | | | pools. |
| Castrella (Castrella) truncata | 1913 or earlier | | | ubiquitous, very active, prefers swimming at the surface of cold and warm, standing and flowing water. |
| Strongylostoma radiatum | 1913 or earlier | | | ponds and lakes. |
| Strongylostoma elongatum | 1913 or earlier | | | lakes in Sweden, up to 1980 m altitude. |
| Rhynchomesostoma rostratum | 1913 or earlier | | | |
| Typhloplana viridata | 1913 or earlier | | | moors and lakes. |
| Typhloplana minima | 1913 or earlier | | | |
| Castrada (Castrada) instructa | 1911 or earlier | | | ponds and lakes. |
| Castrada (Castrada) lanceola | 1913 or earlier | | | |
| Castrada (Castrada) hofmanni | 1913 or earlier | | | |
| Castrada (Castrada) quadridentata | 1913 or earlier | 1 m | | In the larger lakes, and deeper lakes. |
| Castrada (Castrada) intermedia | 1913 or earlier | | | |
| Castrada (Castrada) armata | 1913 or earlier | | | mud of pools and lakes, and littoral zone. |
| Castrada (Castrada) neocomensis | 1913 or earlier | | | |
| Mesostoma lingua | 1913 or earlier | | | mud and detritus, of pools, ponds and lakes. |
| Bothromesostoma personatum | 1913 or earlier | | | |
| Bothromesostoma essenii | 1913 or earlier | | | |
| Planaria torva | 1892 or earlier | | | Schweden: Uppland. |
| Dugesia lugubris | 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 | 1916 or earlier | | | Schweden (nicht im nordschwed) |