| Macrostomum hystrix Ørsted, 1843 | prior to 1894 | | | marsh |
| Microstomum lineare (Müller, 1773) | prior to 1894 | | | |
| Mesostoma viridatum (Abildgaard, 1789) | prior to 1894 | | | marsh. |
| Bothromesostoma personatum (Schmidt, 1848) | prior to 1894 | | | |
| Gyratrix hermaphroditus Ehrenberg, 1831 | prior to 1894 | | | numerous. |
| Vortex truncatus (Abildgaard, 1789) | prior to 1894 | | | |
| Polycelis nigra (Müller, 1774) | prior to 1894 | | | |
| Polycelis cornuta Johnston, 1822 | prior to 1894 | | | |
| Dendrocoelum lacteum (Müller, 1773) | prior to 1894 | | | |
| Mesostoma lingua (Abildgaard, 1789) | 1894 or earlier | | | Umgebung von Basel: Teich bei Kleinhüningen. |