| Citation | Nagai, S. and K. Nomura, 1988 Crustacea (Brachyura). [The guide book of marine organisms of Okinawa]. 7:1-250. Shinsei Tosho, Okinawa, Japan. |
| Ref. | 75283 Nagai, S. and K. Nomura, 1988 |
| Page | 221 |
| Named Used as Valid | Echinoecus pentagonus |
| Locality | |
| Distribution | Okinawa, Ryukyu Islands, Japan. |