| Stenostomum leucops (Duges, 1828) | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Macrostomum distinguendum Papi, 1951 | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Stenostomum unicolor Schmidt, 1848 | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Microstomum lineare (Müller, 1773) | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Prorhynchus stagnalis Schultze, 1851 | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Geocentrophora baltica (Kennel, 1883) | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Geocentrophora sphyrocephala de Man, 1876 | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Otomesostoma auditivum (Forel & du Plessis, 1874) | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Castrella (Castrella) truncata (Abildgaard, 1789) | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Mesostoma lingua (Abildgaard, 1789) | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Gyratrix hermaphroditus Ehrenberg, 1831 | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |
| Opisthocystis goettei (Bresslau, 1906) | May 1966 - Feb 1967 | littoral | | calcium rich lake (7.2 mg/l). |