| Paratomella rubra Rieger & Ott, 1971 | May 1978 | | sand | |
| Stylochoplana gracilis Heath & McGregor, 1912 | May 27, 1938 | 100 m | kelp | large floating kelp. |
| Notoplana acticola (Boone, 1929) | Mar 6, 1898 | | | collected by the "Albatross" |
| Notoplana acticola (Boone, 1929) | prior to 1953 | | | collected by Reish. |
| Notoplana sciophila (Boone, 1929) | prior to 1953 | | | |
| Diplandros singularis Hyman, 1953 | prior to 1953 | | | found in the Fisher collection, labeled La Jolla. |
| Alloioplana sandiegensis (Boone, 1929) | prior to 1929 | | | Bonne's type specimen deposited in the Natural History Museum, Stanford University, No. 5634. |
| Alloioplana sandiegensis (Boone, 1929) | Dec 31, 1884 | | | collected by the United States National Museum. |
| Prostheceraeus bellostriatus Hyman, 1953 | prior to 1953 | | | illustrated in the Johnson and Snook book and collected under a stone. |