| Macrostomum orthostylum Braun, 1885 | 1913 or earlier | 78 m | mud | |
| Dalyellia cuspidata (Schmidt, 1861) | 1913 or earlier | 30-40 m | | |
| Phaenocora unipunctata (Ørsted, 1843) | 1913 or earlier | 78 m | | |
| Castrada (Castrada) spinulosa Hofsten N, 1907 | 1913 or earlier | 40 m | | |
| Castrada (Castrada) quadridentata Hofsten N, 1907 | 1913 or earlier | | | In the larger lakes, and deeper lakes. |
| Trigonostomum neocomense (Fuhrmann, 1904) | 1913 or earlier | 30-40 m | | |
| Macrostomum orthostylum Braun, 1885 | 1911 or earlier | | | |
| Microstomum lineare (Müller, 1773) | 1911 or earlier | 8-17 m | | |
| Macrostomum appendiculatum Fabricius, 1826 | 1911 or earlier | | | Teich bei Locarno am Lago Maggiore. |
| Macrostomum orthostylum Braun, 1885 | 1911 or earlier | 78 m | | |
| Dalyellia cuspidata (Schmidt, 1861) | 1911 or earlier | | | Teich bei Locarno am Lago Maggiore. |
| Castrella (Castrella) truncata (Abildgaard, 1789) | 1911 or earlier | | | Lago Maggiore, Ufer. |
| Phaenocora unipunctata (Ørsted, 1843) | 1911 or earlier | 78 m | | Lago Maggiore, in 78 m Tiefe. |
| Strongylostoma radiatum (Müller, 1774) | 1911 or earlier | 8-10 m | | Lago Maggiore. |
| Castrada (Castrada) spinulosa Hofsten N, 1907 | 1911 or earlier | 8-40 m | | Litoral und Tiefe. |
| Trigonostomum neocomense (Fuhrmann, 1904) | 1911 or earlier | 30-40 m | | Lago Maggiore, Tiefe (vor Locarno, 30 bis 40 m). |
| Gyratrix hermaphroditus Ehrenberg, 1831 | 1911 or earlier | 4 m | | Lago Maggiore, Litoral (4 m). |
| Otomesostoma auditivum (Forel & du Plessis, 1874) | 1911 or earlier | 8-78 m | | Lago Maggiore: Litoral und Tiefe (8-78 m). |
| Phaenocora unipunctata (Ørsted, 1843) | 1912 or earlier | 78 m | | Schweiz, viele Fundorte, bis 1500 m ü.M. und 78 m Tiefe im Lago Maggiore. |
| Microdalyellia erythrocephala (Steinböck, 1949) | Aug 11, 1942 | | | Lago Maggiore, Delta der Toce-Mündung. |