| Olisthanella obtusa (Schultze, 1851) | 1926 or earlier | | | Peterhof. |
| Microdalyellia kupelwieseri (Meixner, 1915) | 1926 or earlier | | | gouv. Leningrad, u.a. Peterhof |
| Mesostoma productum (Schmidt, 1848) | 1926 or earlier | | | |
| Mesostoma craci Schmidt, 1858 | 1924 or earlier | | | |
| Rhynchoscolex simplex Leidy, 1852 | 1918 or earlier | | | Russland: Umgebung von Petrograd = Leningrad, Peterhof. |
| Geocentrophora sphyrocephala de Man, 1876 | 1926 or earlier | | | Russland: Leningrad u. Peterhof |
| Microdalyellia picta (Schmidt, 1848) | 1926 or earlier | | | Gouv. Leningrad: fliessendes Wasser am Ufer der Nevskaja Guba u. in Teichen von Peterhof. |
| Microdalyellia mollosovi (Nasonov, 1920) | 1926 or earlier | | | |
| Dalyellia penicilla (Braun, 1885) | 1926 or earlier | | | Umgebung von Leningrad: Ligowo, Ufer des Mollosovo-Sees, Peterhof. |
| Gieysztoria rubra (Fuhrmann, 1894) | 1926 or earlier | | | Park des Peterhofer Instituts |