| Gieysztoria maritima Luther, 1955 | [with synonyms] | w | other research on this sp. | |
| Macrostomum appendiculatum (2) Beklemischev, 1915 | | w | latest taxonomic authority | |
| Macrostomum appendiculatum (3) Beklemischev, 1922 | | w | latest taxonomic authority | |
| Macrostomum appendiculatum (4) Beklemischev, 1915 | | - | latest taxonomic authority | |
| Macrostomum hystricinum Chodorowski, 1959 | | w | latest taxonomic authority | |
| Macrostomum phytophilum Beklemischev, 1951 | | w | latest taxonomic authority | |
| Macrostomum rostratum Papi, 1951 | [with synonyms] | w | other taxonomic work | 476-477 |
| Macrostomum viride (5) Luther, 1905 | | w | latest taxonomic authority | |
| Microstomum caudatum Leidy, 1852 | | w | latest taxonomic authority | |
| Microstomum giganteum Hallez, 1878 | | w | latest taxonomic authority | |
| Microstomum inerme Zacharias, 1894 | | w | latest taxonomic authority | |
| Microstomum lineare (Müller, 1773) | [with synonyms] | w | other taxonomic work | 483-484, Abb. 28-29 |
| Microstomum lineare giganteum Hallez, 1878 | | w | latest taxonomic authority | |
| Microstomum lineare giganteum Dorner, 1902 | | w | latest taxonomic authority | |
| Microstomum lineare lineare Dorner, 1902 | | w | latest taxonomic authority | |
| Rhynchoscolex remanei Rixen, 1961 | | w | primary taxonomic authority (describer) | 472-475, Abb. 1-4 |
| Provorticinae Provorticidorum Rixen, 1961 | | w | primary taxonomic authority (describer) | |
| Macrostomum subterraneum Rixen, 1961 | | w | primary taxonomic authority (describer) | 482, Abb. 25-77 |
| Bresslauilla relicta Reisinger, 1929 | | w | other research on this sp. | 491-492 |
| Opistomum fuscum Weise, 1942 | | w | other taxonomic work | 501-502 |
| Macrostomum hystricinum Beklemischev, 1951 | [with synonyms] | w | other research on this sp. | 476 |
| Provorticidorum sp. Rixen, 1961 | | - | primary taxonomic authority (describer) | 489-490, Abb. 32-34 |
| Macrostomum sp. Ax, 1957 | | - | other taxonomic work | 478-479, Abb. 17 |
| Macrostomum distinguendum Papi, 1951 | [with synonyms] | w | other taxonomic work | 477-478 |
| Macrostomum finnlandense (Ferguson, 1940) | [with synonyms] | w | other research on this sp. | 479-480, Abb. 18-21 |
| Macrostomum tenuicauda Luther, 1947 | | w | other research on this sp. | 480-481, Abb. 22-24 |
| Macrostomum curvituba Luther, 1947 | | w | other research on this sp. | 481 |
| Macrostomum tuba Graff, 1882 | [with synonyms] | w | other research on this sp. | 481-482 |
| Microstomum sp. Rixen, 1961 | | - | primary taxonomic authority (describer) | 484 |
| Geocentrophora baltica (Kennel, 1883) | [with synonyms] | w | other research on this sp. | 485 |
| Geocentrophora sphyrocephala de Man, 1876 | [with synonyms] | w | other research on this sp. | 485 |
| Coelogynopora sp. Rixen, 1961 | | - | primary taxonomic authority (describer) | 22 |
| Plagiostomum lemani Forel & Du Plessis, 1874 | | w | other research on this sp. | 486 |
| Otomesostoma auditivum (Forel & du Plessis, 1874) | [with synonyms] | w | other research on this sp. | 486-488 |
| Coelogynoporidae Coelogynopora Steinböck, 1924 | | w | other research on this sp. | 486 |
| Bothrioplana semperi Braun, 1881 | [with synonyms] | w | other research on this sp. | 488-489 |
| Vejdovskya ignava Ax, 1951 | | w | other research on this sp. | 489 |
| Microdalyellia armigera (Schmidt, 1862) | [with synonyms] | w | other research on this sp. | 493 |
| Microdalyellia armigera vinculosa (Szynal, 1933) | [with synonyms] | w | other research on this sp. | 493 |
| Microdalyellia kupelwieseri (Meixner, 1915) | [with synonyms] | w | other research on this sp. | 493-494 |
| Microdalyellia schmidtii (Graff, 1882) | [with synonyms] | w | other research on this sp. | 494 |
| Microdalyellia fusca (Fuhrmann, 1894) | [with synonyms] | w | other research on this sp. | 494-495 |
| Microdalyellia fairchildi (Graff, 1911) | [with synonyms] | w | other research on this sp. | 495 |
| Microdalyellia brevimana (Beklemischev, 1921) | [with synonyms] | w | other research on this sp. | 495 |
| Microdalyellia picta (Schmidt, 1848) | [with synonyms] | w | other research on this sp. | 495 |
| Microdalyellia rossi (Graff, 1911) | [with synonyms] | w | other research on this sp. | 495-496 |
| Dalyellia viridis (Shaw, 1791) | [with synonyms] | w | other research on this sp. | 496-497 |
| Dochmiotrema limicola Hofsten N, 1907 | [with synonyms] | w | other taxonomic work | 499 |
| Phaenocora unipunctata (Ørsted, 1843) | [with synonyms] | w | other taxonomic work | 500 |
| Phaenocora typhlops (Vejdovsky, 1880) | [with synonyms] | w | other taxonomic work | 500-501 |
| Typhloplanidae Phaenocorinae Wahl, 1910 | | w | other taxonomic work | 500 |
| Typhloplanidae Opistominae Luther, 1963 | | w | other taxonomic work | 501 |
| Opistomum pallidum Schmidt, 1848 | [with synonyms] | w | other taxonomic work | 501 |
| Opistomum fuscum Weise, 1942 | | w | other taxonomic work | 501-502 |
| Strongylostoma radiatum (Müller, 1774) | [with synonyms] | w | other taxonomic work | 503 |
| Castrada (Castrada) sphagnetorum Luther, 1904 | | w | other research on this sp. | |
| Castrada (Castrada) armata (Fuhrmann, 1894) | [with synonyms] | w | other research on this sp. | 504-505 |
| Typhloplanidae Mesostominae Hyman, 1955 | | w | other research on this sp. | 505 |