| Prorhynchus stagnalis Schultze, 1851 | 1913 or earlier | | | |
| Dalyellia coronaria (Schmidt, 1858) | 1913 or earlier | | mud | Volga-mud near Saratow. |
| Mesostoma tetragonum (Müller, 1774) | 1913 or earlier | | | |
| Gieysztoria rubra frankia (Nasonov, 1919) | 1919 or earlier | | | Russland. Gouv. Saratov, Krestov (Nasonov). |
| Typhloplana viridata (Abildgaard, 1789) | 1919 or earlier | | | Russland. Saratov, Wolga. |
| Strongylostoma radiatum (Müller, 1774) | 1924 or earlier | | | |
| Rhynchomesostoma rostratum (Müller, 1774) | 1919 or earlier | | | |
| Olisthanella truncula (Schmidt, 1858) | 1921 or earlier | | | |
| Mesostoma ehrenbergii (Focke, 1836) | 1921 or earlier | | | |
| Mesostoma lingua (Abildgaard, 1789) | 1902 or earlier | | | |
| Mesostoma craci Schmidt, 1858 | 1921 or earlier | | | |
| Mesostoma tetragonum (Müller, 1774) | 1902 or earlier | | | in der Wolga bei Saratov. |
| Bothromesostoma personatum (Schmidt, 1848) | 1902 or earlier | | | |
| Bothromesostoma personatum (Schmidt, 1848) | 1921 or earlier | | | |
| Bothromesostoma essenii Braun, 1885 | 1921 or earlier | | | |
| Phaenocora unipunctata (Ørsted, 1843) | 1902 or earlier | | | Wolga bei Saratov |
| Plagiostomum lemani Forel & Du Plessis, 1874 | 1900 or earlier | | | Saratov Wolga. |
| Microdalyellia armigera (Schmidt, 1862) | 1924 or earlier | | | |
| Microdalyellia fairchildi (Graff, 1911) | 1921 or earlier | | | |
| Microdalyellia picta (Schmidt, 1848) | 1921 or earlier | | | |
| Gieysztoria cuspidata (Schmidt, 1861) | 1919 or earlier | | | |
| Castrella (Castrella) truncata (Abildgaard, 1789) | 1921 or earlier | | | Saratov: Krestov. |