Stylochoplana pusilla Bock, 1924 | 1938 | | | commonly found on the coasts of Japan. |
Prosthiostomum auratum Kato, 1937 | 1938 or earlier | | | |
Micaplana misae Kato, 1937 | 1936 | 20 m | | autumn of 1936 by dredging from a depth of about 20 meters off Susaki, Idu. |
Discocelis japonica Yeri & Kaburaki, 1918 | 1944 or earlier | | | |
Stylochus ijimai Yeri & Kaburaki, 1918 | 1944 or earlier | | | Susaki near Simoda. |
Stylochus izuensis Kato, 1944 | Feb 20, 1937 | 18 m | | Off Susaki near Simoda, Izu. A single specimen was collected by dredge from a depth of 18 m. |
Cryptocelis ijimai Bock, 1923 | 1944 or earlier | | | Susaki near Simoda. |
Amemiyaia pacifica Kato, 1944 | 1944 or earlier | | | |
Notoplana delicata (Yeri & Kaburaki, 1918) | 1944 or earlier | | | |
Discoplana gigas Schmarda, 1859 | 1944 or earlier | | | |
Discoplana takewakii Kato, 1935 | 1944 or earlier | | | |
Planocera purpurea Yeri & Kaburaki, 1918 | 1944 or earlier | | | |
Prosthiostomum vulgaris Kato, 1938 | 1944 or earlier | | | |
Prosthiostomum komaii Kato, 1944 | 1944 or earlier | | | Susaki near Simoda. |
Prosthiostomum suzakiensis Kato, 1944 | 1944 or earlier | | | Susaki near Simoda. |