| Plagiostomum lemani Forel & Du Plessis, 1874 | Sep 1908 | | | |
| Olisthanellinella rotundula Reisinger, 1924 | Oct 19, 1955 | | | Moos in Wald von Myrtillus-Typus, Probe von E. Karppinen. |
| Polycelis tenuis Ijima, 1884 | 1961 or earlier | | | Tuusula, Tuusulanjärvi = Tusby träsk (A. L.) |
| Dendrocoelum lacteum (Müller, 1773) | 1961 or earlier | | | Tuusula, Tuusulanjärvi = Tusby träsk. (K. M. Levander) [Ab. map area, p. 42 of Luther 1961]. |
| Bdellocephala punctata (Pallas, 1774) | 1961 or earlier | | | Tuusula, Tuusulanjärvi = Tusby träsk (Levander, Alex Luther) [N. map area, p. 42 Luther 1961] |
| Opistomum arsenii Nasonov, 1917 | 1963 or earlier | | | |
| Castrada (Castrada) lanceola (Braun, 1885) | 1963 or earlier | | | tuusulanjärvi = Tusby träsk. |
| Castrada (Castrada) hofmanni Braun, 1885 | 1963 or earlier | | | Tvärminne träsk. Tusby träsk = Tuusulanjärvi. |
| Strongylostoma radiatum (Müller, 1774) | 1963 or earlier | | | Tuusula = Tusby, Tuusulanjärvi |
| Rhynchomesostoma rostratum (Müller, 1774) | 1963 or earlier | | | |
| Olisthanella truncula (Schmidt, 1858) | 1963 or earlier | | | |
| Phaenocora unipunctata (Ørsted, 1843) | May 5, 1901 | | | |
| Microstomum lineare (Müller, 1773) | 1960 or earlier | | | Tuusulanjärvi |
| Microdalyellia brevimana (Beklemischev, 1921) | Jan 16, 1917 | | | |
| Microdalyellia picta (Schmidt, 1848) | 1955 or earlier | | | |
| Castrella (Castrella) truncata (Abildgaard, 1789) | 1955 or earlier | | | |