Microstomum giganteum | 1913 or earlier | | | |
Prorhynchus stagnalis | 1913 or earlier | | | |
Prorhynchus curvistylus | 1913 or earlier | | | |
Dalyellia armigera | 1913 or earlier | | | very active, swimming near the surface in standing water and flowing water, mud soils. |
Dalyellia viridis | 1913 or earlier | | | |
Castrella truncata | 1913 or earlier | | | ubiquitous, very active, prefers swimming at the surface of cold and warm, standing and flowing water. |
Phaenocora unipunctata | 1913 or earlier | | | |
Tetracelis marmorosa | 1913 or earlier | | | standing puddles and lakes. |
Artioposthia triangulata | 1988 or earlier | | | North Ireland, Scotland and England, U.K. |
Artioposthia triangulata | 1981 or earlier | | | Scotland and England, U.K. |
Phaenocora unipunctata | 1896 or earlier | | | |
Geocentrophora baltica | 1907 or earlier | | | Schottland. |
Plagiostomum lemani | 1911 or earlier | | | Schottland (Hofsten 1911c nach Wesenberg-Lund). |
Dugesia polychroa | 1981 or earlier | | | fairly widespread, occurring in England, Scotland and Wales. |
Planaria torva | 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 | 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 | 1981 or earlier | | | lakes |
Arthurdendyus albidus | 1996 | | | |
Arthurdendyus australis | 1997 | | | |