| Convoluta convoluta (Abildgaard, 1806) | prior to 1905 | littoral | | |
| Plagiostomum meledanum Graff, 1911 | Mar and Apr 1907 | | | found in the Lago di Saint Maria up to Meleda. |
| Plagiostomum sulphureum Graff, 1882 | 1907 | | | found under "Convento" in Lesina. |
| Proporus rubropunctata Schmidt, 1852 | 1852 or earlier | | | |
| Schizoprora venenosus Schmidt, 1852 | 1852 or earlier | | | |
| Convoluta paradoxa Ørsted, 1843 | 1852 or earlier | | | |
| Convoluta schultzii Schmidt, 1852 | 1852 or earlier | | | |
| Proxenetes gracilis Graff, 1882 | 1913 or earlier | | | |
| Promesostoma ovoideum ovoideum Graff, 1905 | 1913 or earlier | | | |
| Promesostoma solea (Schmidt, 1857) | 1886 or earlier | | | |
| Paramesostoma neapolitanum (Graff, 1882) | 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 mamertina (Graff, 1874) | 1913 or earlier | | | |
| Phonorhynchus helgolandicus (Metschnikow, 1865) | 1913 or earlier | | | |
| Plagiostomum girardi (Schmidt, 1857) | 1913 or earlier | | | slow acting and swimming, in waste water and aquariums. |
| Plagiostomum maculatum Graff, 1882 | 1913 or earlier | | | |
| Plagiostomum reticulatum (Schmidt, 1852) | 1913 or earlier | littoral | | |
| Plagiostomum rufodorsatum (Uljanin, 1870) | 1913 or earlier | | | |
| Plagiostomum siphonophorum (Schmidt, 1852) | 1913 or earlier | | | |
| Plagiostomum benedeni (Schmidt, 1852) | 1886 or earlier | | | |
| Vorticeros auriculatum (Müller, 1784) | 1913 or earlier | 0-35m | | littoral up to 35 m deep in Algen and Bryozoen. |
| Vorticeros luteum Hallez, 1879 | 1913 or earlier | 0-13 m | | Generally found among Ulven and Zosteren. Found a 13 m depth, with Bugula turbinata. |
| Plicastoma bimaculatum (Graff,1882) | 1913 or earlier | | | October and November among Zostera. |
| Pseudostomum quadrioculatum (Leuckart, 1847) | 1913 or earlier | | | |
| Pseudostomum klostermanni (Graff, 1874) | 1913 or earlier | | | |
| Monoophorum striatum (Graff, 1878) | 1913 or earlier | 0-28 m | | among Ulven, Bryozoans. |
| Enterostomum zooxanthella Graff, 1886 | 1886 or earlier | | | |
| Allostoma monotrochum Graff, 1882 | 1913 or earlier | | | also with Plagiostomum girardi. |
| Convoluta schultzii Schmidt, 1852 | 1933 or earlier | | | |
| Convoluta sordida Graff, 1882 | 1933 or earlier | | | |
| Thysanozoon brocchii (Risso, 1818) | 1933 or earlier | | | |
| Plagiostomum siphonophorum (Schmidt, 1852) | 1933 or earlier | | | |
| Proporus venenosus (Schmidt, 1852) | 1905 or earlier | | | Adria (Triest, Lesina, Meleda). |
| Mesostoma craci Schmidt, 1858 | 1913 or earlier | | | |