| author | date | title | journal / publication | Reynoldson TB | 1950 | abs. | Natural population fluctuations of Urceolaria mitra (Protozoa, Peritricha) epizoic on flatworms. | Jour Animal Ecol 19(2): 106-118 |
|---|
| Polycelis tenuis Ijima, 1884 | [with synonyms] | w | other research on this sp. | |
| Polycelis nigra (Müller, 1774) | [with synonyms] | w | other research on this sp. | |
| Dugesia lugubris (Schmidt, 1861) | w | other research on this sp. |