| Mesostoma murmanicum Nasonov, 1923 | | w | primary taxonomic authority (describer) | 76 |
| Olisthanella arctica Nasonov, 1923 | | w | primary taxonomic authority (describer) | 77 |
| Opistomum tundrae Nasonov, 1923 | | w | primary taxonomic authority (describer) | 76 |
| Stenostomum grande Child, 1902 | [with synonyms] | w | other taxonomic work | 75 |
| Stenostomum unicolor Schmidt, 1848 | [with synonyms] | w | other taxonomic work | 75 |
| Rhynchoscolex simplex Leidy, 1852 | [with synonyms] | w | other taxonomic work | 75 |
| Macrostomum appendiculatum Fabricius, 1826 | [with synonyms] | w | other taxonomic work | 75 |
| Dalyellia ornata Hofsten N, 1907 | | w | other taxonomic work | 75 |
| Dalyellia infundibuliformis (Fuhrmann, 1894) | | w | other taxonomic work | 75 |
| Dalyellia armigera Schmidt, 1861 | | w | other taxonomic work | 75 |
| Castrada (Castrada) inermis Hofsten N, 1911 | | w | other taxonomic work | 75 |
| Castrada (Castrada) instructa Hofsten N, 1907 | | w | other taxonomic work | 75 |
| Castrada (Castrada) stagnorum Luther, 1904 | [with synonyms] | w | other taxonomic work | 75 |
| Castrada (Castrada) sphagnetorum Luther, 1904 | | w | other taxonomic work | 75 |
| Castrada (Castrada) intermedia (Volz, 1898) | [with synonyms] | w | other taxonomic work | 75 |
| Castrada (Castrada) neocomensis Volz, 1898 | | w | other taxonomic work | 75 |
| Castrada (Castrada) luteola Hofsten N, 1907 | | w | other taxonomic work | 75 |
| Castrada (Castrada) libidinosa Hofsten, 1916 | | w | other taxonomic work | 75 |
| Polycystis goettei Bresslau, 1906 | | w | other taxonomic work | 75 |
| Gyratrix hermaphroditus hermaphroditus Ehrenberg, 1831 | | w | other taxonomic work | 75 |
| Prorhynchus stagnalis Schultze, 1851 | [with synonyms] | w | other taxonomic work | 75 |
| Geocentrophora baltica (Kennel, 1883) | [with synonyms] | w | other taxonomic work | 75 |
| Geocentrophora sphyrocephala de Man, 1876 | [with synonyms] | w | other taxonomic work | 75 |
| Typhloplanella arctica (Nasonov, 1923) | [with synonyms] | w | primary taxonomic authority (describer) | 0 |
| Olisthanella (Typhloplanella) arctica Nasonov, 1923 | | - | primary taxonomic authority (describer) | |