| Karlingiinae | Acanthomacrostomum | Papi & Swedmark, 1959 | |
| Macrostomum | axi | Papi, 1959 | |
| Stenostomum | beauchampi | Papi, 1967 | |
| (Castrada) | beklemischevi | Papi, 1959 | |
| Mesostoma | benazii | Papi, 1949 | |
| (Castrada) | brevispina | Papi, 1959 | |
| Macrostomum | caprariae | Papi, 1959 | |
| Stenostomum | constrictum | Papi in Luther, 1960 | |
| (Castrada) | cristatispinosa | Papi, 1951 | |
| Macrostomum | curvata | Papi, 1951 | |
| Macrostomum | orthostylum | curvata | Papi, 1951 |
| Macrostomum | appendiculatum (1) | distinguenda | Papi, 1951 |
| Macrostomum | distinguenda | Papi, 1951 | |
| Macrostomum | distinguendum | Papi, 1951 | |
| Hofsteniidae | Hofsteniola | Papi, 1957 | |
| (Castrada) | infernalis | Papi, 1951 | |
| Lutheria | minuta | interstitialis | Lanfranchi & Papi, 1978 |
| Lutheria | interstitialis | Lanfranchi & Papi, 1978 | |
| Macrostomum | karlingi | Papi, 1953 | |
| Strongylostoma | simplex | lapponicum | Papi in Luther, 1963 |
| Macrostomum | longituba | Papi, 1953 | |
| (Castradella) | lutheri | Papi, 1959 | |
| Rhynchomesostoma | lutheri | Papi, 1963 | |
| Myozona | lutheri | Papi, 1953 | |
| Macrostomum | meridionale | Papi, 1953 | |
| Macrostomum | balticum | meridionalis | Papi, 1953 |
| (Castrada) | montana | Papi, 1959 | |
| (Castrada) | noemiae | Papi, 1951 | |
| Hofsteniola | pardii | Papi, 1957 | |
| Macrostomum | pithecusae | Papi, 1959 | |
| Paramacrostomum | quiesztoria | (Bedini & Papi, 1970) | |
| Macrostomum | orthostylum | recurva | Papi, 1951 |
| Macrostomum | retortum | Papi, 1951 | |
| Macrostomum | viride (1) | rostrata | Papi, 1951 |
| Macrostomum | rostratum | Papi, 1951 | |
| Stenostomum | sphagnetorum | Papi in Luther, 1960 | |
| Acanthomacrostomum | spiculiferum | Papi & Swedmark, 1959 | |
| Jenseniidae | Thalassovortex | Papi, 1956 | |
| Parotoplana | truncaspina | Bedini & Papi, 1974 | |
| Thalassovortex | tyrrhenicus | Papi, 1956 | |
| Macrostomum | viride (4) | Papi, 1951 |
41 names, including those in new combination. (Max listing set to 900)