| 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. |