| 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 |