| Hofstenia minuta Palombi, 1928 | 1924 |  |  |  | 
| Stylochus suesensis Ehrenberg, 1831 | 1924 |  |  |  | 
| Idioplana australiensis (2) Palombi, 1928 | 1924 |  |  |  | 
| Stylochoplana pallida (Quatrefage, 1845) | 1924 |  |  |  | 
| Stylochoplana angusta (Verrill, 1893) | 1924 |  |  |  | 
| Leptoplana tremellaris (Müller, 1773) | 1924 |  |  |  | 
| Leptoplana tremellaris (Müller, 1773) | 1924 |  |  |  | 
| Notoplana atomata (Müller, 1776) | 1924 |  |  |  | 
| Notoplana atomata Müller, 1776 | 1924 |  |  |  | 
| Notoplana robusta Palombi, 1928 | 1924 |  |  |  | 
| Notoplanides opisthopharynx Palombi, 1928 | 1924 |  |  |  | 
| Thysanozoon brocchii (Risso, 1818) | 1924 |  |  |  | 
| Thysanozoon brocchii (Risso, 1818) | 1924 |  |  |  | 
| Pseudoceros velutinus (Blanchard, 1847) | 1924 |  |  |  | 
| Pseudoceros caeruleopunstatus Palombi, 1928 | 1924 |  |  |  | 
| Ditremagenia macropharynx Palombi, 1928 | 1924 |  |  |  | 
| Stylochus suesensis Ehrenberg, 1831 | 1928 or earlier |  |  |  | 
| Idioplana australiensis Woodworth, 1898 | 1928 or earlier |  |  |  | 
| Stylochoplana pallida (Quatrefage, 1845) | 1928 or earlier |  |  |  | 
| Stylochoplana angusta (Verrill, 1893) | 1928 or earlier |  |  |  | 
| Leptoplana tremellaris (Müller, 1773) | 1928 or earlier |  |  |  | 
| Notoplana atomata (Müller, 1776) | 1928 or earlier |  |  |  | 
| Notoplana robusta Palombi, 1928 | 1928 or earlier |  |  |  | 
| Notoplanides opisthopharynx Palombi, 1928 | 1928 or earlier |  |  |  | 
| Thysanozoon brocchii (Risso, 1818) | 1928 or earlier |  |  |  | 
| Pseudoceros velutinus (Blanchard, 1847) | 1928 or earlier |  |  |  | 
| Pseudoceros caeruleopunstatus Palombi, 1928 | 1928 or earlier |  |  |  | 
| Opisthogenia tentaculata Palombi, 1928 | 1928 or earlier |  |  |  | 
| Ditremagenia macropharynx Palombi, 1928 | 1928 or earlier |  |  | an ectoparasite. | 
| Hofstenia minuta Palombi, 1928 | 1928 or earlier |  |  |  | 
| Notoplanides opisthopharynx Palombi, 1928 | 1924 |  |  |  |