| Castrada (Castrada) hofmanni Braun, 1885 | 1921 or earlier | | | Perm. |
| Castrada (Castrada) intermedia (Volz, 1898) | 1921 or earlier | | | |
| Castrada (Castrada) viridis Volz, 1898 | 1921 or earlier | | | Perm. |
| Castrada (Castrada) neocomensis Volz, 1898 | 1921 or earlier | | | Perm |
| Castrada (Castrada) armata (Fuhrmann, 1894) | 1921 or earlier | | | Perm |
| Strongylostoma radiatum (Müller, 1774) | 1924 or earlier | | | |
| Strongylostoma elongatum elongatum Hofsten N, 1907 | 1924 or earlier | | | |
| Rhynchomesostoma rostratum (Müller, 1774) | 1921 or earlier | | | |
| Olisthanella truncula (Schmidt, 1858) | 1921 or earlier | | | |
| Olisthanella palmeni Nasonov, 1917 | 1921 or earlier | | | |
| Mesostoma ehrenbergii (Focke, 1836) | 1921 or earlier | | | |
| Mesostoma lingua (Abildgaard, 1789) | 1921 or earlier | | | |
| Mesostoma craci Schmidt, 1858 | 1921 or earlier | | | |
| Mesostoma tetragonum (Müller, 1774) | 1921 or earlier | | | |
| Bothromesostoma essenii Braun, 1885 | 1921 or earlier | | | |
| Phaenocora typhlops (Vejdovsky, 1880) | 1921 or earlier | | | |
| Phaenocora unipunctata (Ørsted, 1843) | 1921 or earlier | | | |
| Rhynchoscolex simplex plotnikovi Beklemischev, 1923 | 1924 or earlier | | | Perm. |
| Macrostomum rostratum Papi, 1951 | 1960 or earlier | | | Russland. M. phytophilum Leningrad; Perm. Sibirien, Tomsk u.s.w. (Beklemischev). |
| Macrostomum distinguendum Papi, 1951 | 1960 or earlier | | | Russland: Umgebung von Leningrad; Sudmir; Perm; Tomsk (Beklemischev). |
| Geocentrophora sphyrocephala de Man, 1876 | 1921 or earlier | | | Russland: Perm |
| Microdalyellia armigera (Schmidt, 1862) | 1924 or earlier | | | |
| Microdalyellia fusca (Fuhrmann, 1894) | 1950 or earlier | | | |
| Microdalyellia brevimana (Beklemischev, 1921) | 1921 or earlier | | | |
| Microdalyellia picta (Schmidt, 1848) | 1924 or earlier | | | |
| Microdalyellia rossi (Graff, 1911) | 1921 or earlier | | | |
| Microdalyellia mollosovi (Nasonov, 1920) | 1921 or earlier | | | |
| Microdalyellia nanella (Beklemischev, 1921) | 1921 or earlier | | | |
| Gieysztoria expedita (Hofsten N, 1907) | 1924 or earlier | | | Perm. Gouv. Vladimir u. Ivanovo-Vosnesensk. |
| Gieysztoria virgulifera (Plotnikow, 1906) | 1921 or earlier | | | Perm |
| Sergia sergia (Beklemischev, 1918) | 1927 or earlier | | | |
| Castrella (Castrella) vernalis Beklemischev, 1921 | 1921 or earlier | | | Perm, 29 April, in geringer Zahl zusammen mit Microdalyellia nanella; offenbar eine Frühlingsform wie diese. |
| Castrella (Castrella) truncata (Abildgaard, 1789) | 1900 or earlier | | | |