| Allostoma pallidum Beneden, 1861 | prior to 1882 | | | tide pool |
| Monotus lineatus Müller, 1773 | prior to 1882 | | | |
| Monotus fusca (Ørsted, 1843) | prior to 1882 | | | |
| Promesostoma marmoratum marmoratum (Schultze, 1851) | 1913 or earlier | | | very active, in marine and brackish water. |
| Promesostoma marmoratum (Schultze, 1851) | 1913 or earlier | | | very active, in marine and brackish water. |
| Plagiostomum vittatum (Frey & Leuckart, 1847) | 1913 or earlier | | | |
| Pseudostomum quadrioculatum (Leuckart, 1847) | 1913 or earlier | | | |
| Monocelis fusca Örsted, 1843 | 1913 or earlier | | | |
| Monocelis lineata (Müller, 1773) | 1913 or earlier | | | |