| Macrostomum viride (1) Beneden E, 1870 | 1913 or earlier | | | found in the Germany (Riesengebirgsseen 1168 m altitude). |
| Macrostomum tuba Graff, 1882 | 1913 or earlier | | | |
| Prorhynchus stagnalis Schultze, 1851 | 1913 or earlier | | | (auch Riessengebirgsseen at 1168 m altitude) |
| Prorhynchus sphyrocephalus (de Man, 1876) | 1913 or earlier | | | |
| Dalyellia cuspidata (Schmidt, 1861) | 1913 or earlier | 30-40 m | | pools and lakes. |
| Dalyellia hallezii Graff, 1882 | 1913 or earlier | | | pools. |
| Dalyellia armigera Schmidt, 1861 | 1913 or earlier | | | very active, swimming near the surface in standing water and flowing water, mud soils. |
| 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. |
| Phaenocora unipunctata (Ørsted, 1843) | 1913 or earlier | | | |
| Opistomum pallidum Schmidt, 1848 | 1913 or earlier | | | lakes and puddles. Middle and northern Germany. |
| Olisthanella splendida (Graff, 1882) | 1913 or earlier | | | puddles and lakes. Probably pelagic. |
| Strongylostoma radiatum (Müller, 1774) | 1913 or earlier | | | ponds and lakes. |
| Rhynchomesostoma rostratum (Müller, 1774) | 1913 or earlier | | | |
| Mesostoma lingua (Abildgaard, 1789) | 1913 or earlier | | | mud and detritus, of pools, ponds and lakes. |
| Mesostoma craci Schmidt, 1858 | 1913 or earlier | | | |
| Mesostoma tetragonum (Müller, 1774) | 1913 or earlier | | | |
| Bothromesostoma essenii Braun, 1885 | 1913 or earlier | | | north Germany. |
| Plagiostomum lemani Forel & Du Plessis, 1874 | 1913 or earlier | | mud | alpine lakes |
| Planaria torva (Müller, 1773) | 1961 or earlier | | | Deutschland, weit verbreitet (viele Autoren)..... |
| Mesostoma tetragonum (Müller, 1774) | 1904 or earlier | | | Königsberg (Braun coll., Luther 1904) |
| Mesostoma rhynchotum Braun, 1885 | 1942 or earlier | | | |
| Rhynchodemus sylvaticus (Leidy, 1852) | 1981 or earlier | | | found in various localities in Germany, Austria and Belgium. |
| Castrada (Castradella) triacetabula Heitkamp, 1982 | 1982 or earlier | | | |