| Mesostomum marmoratum Schultze, 1851 | w | latest taxonomic authority | ||
| Mesostoma vittatus Örsted, 1844 | w | latest taxonomic authority | ||
| Monocelis subulatus Levinsen, 1879 | w | latest taxonomic authority | ||
| Monops subulatus (Müller, 1788) | w | latest taxonomic authority | ||
| Fovia littoralis (Ström, 1768) | w | other taxonomic work | ||
| Monotus spatulicauda Verrill, 1874 | w | latest taxonomic authority | ||
| Niobe zonata Girard, 1852 | [with synonyms] | w | latest taxonomic authority |