| Allostoma durum (Fuhrmann, 1896) | [with synonyms] | w | primary taxonomic authority (describer) | |
| Enterostomula dura (Fuhrmann, 1896) | | w | primary taxonomic authority (describer) | |
| Monoophorum durum Fuhrmann, 1896 | | w | primary taxonomic authority (describer) | 254 |
| Plagiostomum fabrei Fuhrmann, 1896 | | w | primary taxonomic authority (describer) | 1012 |
| Plagiostomum violaceum Fuhrmann, 1896 | | w | primary taxonomic authority (describer) | 1012 |
| Macrorhynchus coeruleus Fuhrmann, 1898 | | w | primary taxonomic authority (describer) | Figs. XX, 14-17 |
| Microstomum lucidum Fuhrmann, 1898 | [with synonyms] | w | other taxonomic work | 1011 |
| Polycystis naegelii Kölliker, 1845 | [with synonyms] | w | other taxonomic work | 1012 |
| Polycystis mamertina (Graff, 1874) | | w | other taxonomic work | 1012 |
| Monoophorum durum Fuhrmann, 1896 | | w | other taxonomic work | 1012 |