| Microstomum giganteum Hallez, 1878 | 1913 or earlier | | | |
| Prorhynchus stagnalis Schultze, 1851 | 1913 or earlier | | | |
| Prorhynchus curvistylus Braun, 1885 | 1913 or earlier | | | |
| 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 | | | |
| 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 | | | |
| Tetracelis marmorosa (Müller, 1773) | 1913 or earlier | | | standing puddles and lakes. |
| Artioposthia triangulata (Dendy, 1895) | 1988 or earlier | | | North Ireland, Scotland and England, U.K. |
| Artioposthia triangulata (Dendy, 1895) | 1981 or earlier | | | Scotland and England, U.K. |
| Phaenocora unipunctata (Ørsted, 1843) | 1896 or earlier | | | |
| Geocentrophora baltica (Kennel, 1883) | 1907 or earlier | | | Schottland. |
| Plagiostomum lemani Forel & Du Plessis, 1874 | 1911 or earlier | | | Schottland (Hofsten 1911c nach Wesenberg-Lund). |
| Dugesia polychroa (Schmidt, 1861) | 1981 or earlier | | | fairly widespread, occurring in England, Scotland and Wales. |
| Planaria torva (Müller, 1773) | 1981 or earlier | | | found in England, Scotland and Ireland. ....its distribution is markedly discontinuous, there being real concentrations in the Edinburgh and Glasgow areas and in East Anglica. |
| Crenobia alpina (Dana, 1766) | 1981 or earlier | | | In Britain ...commonly found under stones and among vegetation, characteristically in spring heads and small, cool, swift streams. In Scotland....permanent member of the fauna of lake. |
| Bdellocephala punctata (Pallas, 1774) | 1981 or earlier | | | lakes |
| Arthurdendyus albidus Jones & Gerard, 1999 | 1996 | | | |
| Arthurdendyus australis (Dendy, 1894) | 1997 | | | |