Prorhynchus stagnalis | 1913 or earlier | | | |
Castrella truncata | 1913 or earlier | | | ubiquitous, very active, prefers swimming at the surface of cold and warm, standing and flowing water. |
Mesostoma lingua | 1913 or earlier | | | mud and detritus, of pools, ponds and lakes. |
Mesostoma tetragonum | 1913 or earlier | | | |
Artioposthia triangulata | 1988 or earlier | | | North Ireland, Scotland and England, U.K. |
Artioposthia triangulata | 1981 or earlier | | | Scotland and England, U.K. |
Phaenocora unipunctata | 1913 or earlier | | | |
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. |
Australopacifica atrata | 2019 or earlier | | | ....."Black terrestrial planarians, 5 mm to 3 cm long, have been found in five locations in the United Kingdom, the earliest in 2015. " |
Artioposthia exulans | 2013 | | | |
Bipalium kewense | 2021 or earlier | | | |
Caenoplana coerulea | 2021 or earlier | | | |
Caenoplana variegata | 2008 | | | |
Arthurdendyus triangulatus | | | | |
Dolichoplana striata | | | | |
Platydemus manokwari | | | | |