| Stenostomum unicolor Schmidt, 1848 | 1913 or earlier | | | damp ground, pools, springs in Europe (England, France, Switzerland), in lakes in the upper layers (Denmark, Germany, Helgoland, Austria, Hungary, Russia). |
| Rhynchoscolex vejdovskyi Sekera, 1889 | 1913 or earlier | | | |
| Macrostomum viride (1) Beneden E, 1870 | 1913 or earlier | | | found in the country of Switzerland. |
| Prorhynchus sphyrocephalus (de Man, 1876) | 1913 or earlier | | | |
| Dalyellia rubra (Fuhrmann, 1894) | 1913 or earlier | | | pools. very lively. |
| Dalyellia ornata Hofsten N, 1907 | 1913 or earlier | | | pools. at an altitude of 1950 m. |
| Dalyellia cuspidata (Schmidt, 1861) | 1913 or earlier | 30-40 m | | pools and lakes. |
| Dalyellia diadema Hofsten N, 1907 | 1913 or earlier | | | isolated in Swiss lakes and ponds at altitudes 2264 m and similar. |
| Dalyellia triquetra (Fuhrmann, 1894) | 1913 or earlier | | | lakes and pools in the riparian zone. |
| Dalyellia brevispina Hofsten N, 1907 | 1913 or earlier | | | pools at 1950 m altitude. |
| Dalyellia schmidtii (Graff, 1882) | 1913 or earlier | | | |
| Dalyellia fusca (Fuhrmann, 1894) | 1913 or earlier | | | |
| Dalyellia viridis (Shaw, 1791) | 1913 or earlier | | | |
| Dalyellia scoparia (Schmidt, 1858) | 1913 or earlier | | | standing water |
| Castrella (Castrella) truncata (Abildgaard, 1789) | 1913 or earlier | | | ubiquitous, very active, prefers swimming at the surface of cold and warm, standing and flowing water. Up to 2456 m in altitude. |
| Phaenocora gracilis (Vejdovsky, 1895) | 1913 or earlier | | | ponds. |
| Opistomum pallidum Schmidt, 1848 | 1913 or earlier | | | lakes and puddles. |
| Olisthanella obtusa (Schultze, 1851) | 1913 or earlier | | | |
| Olisthanella splendida (Graff, 1882) | 1913 or earlier | | | puddles and lakes. Probably pelagic. |
| Olisthanella halleziana (Vejdovsky, 1880) | 1913 or earlier | | mud | In springs of pools and lakes, associated with Crustacean food ?, Tubificiden and Lumbriciden tubes ?. |
| Strongylostoma radiatum (Müller, 1774) | 1913 or earlier | | | ponds and lakes. Altitudes up to 1980 m. |
| Strongylostoma elongatum Hofsten N, 1907 | 1913 or earlier | | | lakes in Switzerland, up to 1980 m altitude. |
| Rhynchomesostoma rostratum (Müller, 1774) | 1913 or earlier | | | |
| Tetracelis marmorosa (Müller, 1773) | 1913 or earlier | | | standing puddles and lakes. Found up to 2220 m altitude. |
| Typhloplana viridata (Abildgaard, 1789) | 1913 or earlier | | | moors and lakes. Up to 2189 m altitude. |
| Typhloplana viridata (Abildgaard, 1789) | 1913 or earlier | | | moors and lakes. Subalpine Switzerland. |
| Typhloplana minima (Fuhrmann, 1894) | 1913 or earlier | | | |
| Castrada (Castrada) fuhrmanni (Volz, 1898) | 1898 or earlier | | | pools. |
| Castrada (Castrada) inermis Hofsten N, 1911 | 1911 or earlier | | | pools and moorland ditches of high moutain locations (altitudes 1780-2400 m). |
| Castrada (Castrada) perspicua (Fuhrmann, 1894) | 1913 or earlier | | | pools and lakes. |
| Castrada (Castrada) instructa Hofsten N, 1907 | 1911 or earlier | | | ponds and lakes. |
| Castrada (Castrada) stagnorum Luther, 1904 | 1911 or earlier | | | pools and lakes of the Hochgebirges, at altitudes up to 2450 m. |
| Castrada (Castrada) hofmanni Braun, 1885 | 1913 or earlier | | | in the Hochgebirgsseen, up to 1810 to 2156 m altitude. |
| Castrada (Castrada) affinis Hofsten N, 1907 | 1907 or earlier | | | pools and lakes in Switzerland, up to 2450 m altitude. |
| Castrada (Castrada) sphagnetorum Luther, 1904 | 1913 or earlier | | | in Sphagnum of marsh, moor waters of high mountains, up to 1815 m altitude. |
| 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 | | | up to 1980 m altitude. |
| Castrada (Castrada) luteola Hofsten N, 1907 | 1913 or earlier | | | ponds and pools of the alpine region, up to 2450 m altitude. |
| Mesostoma lingua (Abildgaard, 1789) | 1913 or earlier | | | mud and detritus, of pools, ponds and lakes. Up to altitudes of 2450 m. |
| Mesostoma tetragonum (Müller, 1774) | 1913 or earlier | | | |
| Plagiostomum lemani Forel & Du Plessis, 1874 | 1913 or earlier | | mud | lakes |
| Dendrocoelum cavaticum sollaudi de Beauchamp, 1931 | 1931 or earlier | | | from a cave in Switzerland. |
| Rhynchodemus carli Fuhrmann, 1914 | 1914 or earlier | | | |
| Anisorhynchodemus diorchis (Fuhrmann, 1914) | 1914 or earlier | | | |
| alpina bathycola Steinmann, 1911 | 1911 or earlier | | | |
| Mesostoma ehrenbergii (Focke, 1836) | 1912 or earlier | | | |
| Bothromesostoma personatum (Schmidt, 1848) | 1912 or earlier | | | |
| Dalyellia scoparia (Schmidt, 1858) | 1912 or earlier | | | Die Angaben von du Plessis übers das Vorkommen in der Schweiz sind nach Hofften (1912a) höchst zweifelhaft. |