| Convoluta bimaculata Graff, 1882 | prior to 1882 | intertidal | beach | feeds on diatoms |
| Convoluta convoluta (Abildgaard, 1806) | 1902 | littoral | | |
| Convoluta langerhansi Graff, 1882 | prior to 1882 | intertidal | beach, rock | under rock |
| Monocelis fasciata Graff, 1911 | prior to 1911 | | | found in Ulva intestinalis in a tide pool behind the Hotel Martianez. |
| Proxenetes cochlear cochlear Graff, 1913 | 1913 or earlier | | | |
| Trigonostomum setigerum setigerum Schmidt, 1852 | 1913 or earlier | | | |
| Polycystis naegelii Kölliker, 1845 | 1913 or earlier | | | living among plants in the litoral zone. |
| Polycystis crocea (Fabricius, 1826) | 1913 or earlier | | | |
| Polycystis mamertina (Graff, 1874) | 1913 or earlier | | | |
| Plagiostomum maculatum Graff, 1882 | 1913 or earlier | | | |
| Monoophorum pleiocelis Graff, 1911 | 1882 or earlier | | | |
| Monocelis lineata (Müller, 1773) | 1913 or earlier | | | |
| Monocelis unipunctata (1) Fabricius, 1826 | 1913 or earlier | | | |
| Heterochaerus langerhansi (Graff, 1882) | 1952 | | | marine caves. |