| Citation | Tokioka, T., 1963 Contributions to Japanese Ascidian fauna. XX. The outline of Japanese ascidian fauna as compared with that of the Pacific Coasts of North America. Publ. Seto mar. Biol. Lab. 11:131-156. |
| Ref. | 3705 Tokioka, T., 1963 |
| Page | |
| Named Used as Valid | Halocynthia okai |
| Locality | |
| Distribution | Japan. |