| Olisthanella septentrionalis Nasonov, 1924 | | w | primary taxonomic authority (describer) | 334 |
| Stenostomum leucops (Duges, 1828) | [with synonyms] | w | other taxonomic work | 302 |
| Stenostomum grande Child, 1902 | [with synonyms] | w | other taxonomic work | 330 |
| Stenostomum unicolor Schmidt, 1848 | [with synonyms] | w | other taxonomic work | 330 |
| Rhynchoscolex simplex Leidy, 1852 | [with synonyms] | w | other taxonomic work | 330 |
| Microstomum lineare (Müller, 1773) | [with synonyms] | w | other taxonomic work | 331 |
| Macrostomum appendiculatum Fabricius, 1826 | [with synonyms] | w | other taxonomic work | 331 |
| Dalyellia ornata Hofsten N, 1907 | | w | other taxonomic work | 332 |
| Dalyellia infundibuliformis (Fuhrmann, 1894) | | w | other taxonomic work | 331 |
| Dalyellia armigera Schmidt, 1861 | | w | other taxonomic work | 332 |
| Castrella (Castrella) truncata (Abildgaard, 1789) | [with synonyms] | w | other taxonomic work | 332 |
| Opistomum tundrae Nasonov, 1923 | | w | other taxonomic work | 336 |
| Olisthanella arctica Nasonov, 1923 | | w | other taxonomic work | 334 |
| Strongylostoma radiatum (Müller, 1774) | [with synonyms] | w | other taxonomic work | 334 |
| Strongylostoma elongatum Hofsten N, 1907 | | w | other taxonomic work | 334 |
| Rhynchomesostoma rostratum (Müller, 1774) | [with synonyms] | w | other taxonomic work | 334 |
| Typhloplana viridata (Abildgaard, 1789) | [with synonyms] | w | other taxonomic work | 334 |
| Castrada (Castrada) instructa Hofsten N, 1907 | | w | other taxonomic work | 335 |
| Castrada (Castrada) stagnorum Luther, 1904 | [with synonyms] | w | other taxonomic work | 335 |
| Castrada (Castrada) hofmanni Braun, 1885 | | w | other taxonomic work | 335 |
| Castrada (Castrada) sphagnetorum Luther, 1904 | | w | other taxonomic work | 335 |
| Castrada (Castrada) viridis Volz, 1898 | [with synonyms] | w | other taxonomic work | 335 |
| Castrada (Castrada) intermedia (Volz, 1898) | [with synonyms] | w | other taxonomic work | 335 |
| Castrada (Castrada) armata (Fuhrmann, 1894) | [with synonyms] | w | other taxonomic work | 335 |
| Castrada (Castrada) neocomensis Volz, 1898 | | w | other taxonomic work | 335 |
| Castrada (Castrada) luteola Hofsten N, 1907 | | w | other taxonomic work | 335 |
| Castrada (Castrada) libidinosa Hofsten, 1916 | | w | other taxonomic work | 335 |
| Mesostoma lingua (Abildgaard, 1789) | [with synonyms] | w | other taxonomic work | 335 |
| Mesostoma murmanicum Nasonov, 1923 | | w | other taxonomic work | 335 |
| Polycystis goettei Bresslau, 1906 | | w | other taxonomic work | 336 |
| Gyratrix hermaphroditus hermaphroditus Ehrenberg, 1831 | | w | other taxonomic work | 336 |
| Prorhynchus stagnalis Schultze, 1851 | [with synonyms] | w | other taxonomic work | 331 |
| Geocentrophora baltica (Kennel, 1883) | [with synonyms] | w | other taxonomic work | 331 |
| Geocentrophora sphyrocephala de Man, 1876 | [with synonyms] | w | other taxonomic work | 331 |
| Typhloplanella septentrionalis (Nasonov, 1925) | [with synonyms] | w | other taxonomic work | 334, 337 |
| Gieysztoria rubra caucasica (Nasonov, 1919) | [with synonyms] | w | other taxonomic work | 331, 348 |
| Gieysztoria taurica (Nasonov, 1923) | [with synonyms] | w | other taxonomic work | 331, 348 |
| Castrella (Castrella) vernalis Beklemischev, 1921 | | w | other taxonomic work | |
| Krumbachia opisthoformis (Nasonov, 1924) | | w | other taxonomic work | 334, 340 |
| Typhloplanella sexmaculata Nasonov, 1923 | [with synonyms] | w | other taxonomic work | 334 |
| Olisthanella (Typhloplanella) sexmaculata Naxonov, 1923 | | - | primary taxonomic authority (describer) | 875-876 |
