| Citation | Alvarado, J.J. and J. Cortés, 2009 Echinoderms. pp. 421-434. In I.S. Wehrtmann, J. Cortés (eds.) Marine biodiversity of Costa Rica, Central America. Springer 538 p. |
| Ref. | 83942 Alvarado, J.J. and J. Cortés, 2009 |
| Page | S.36.2 |
| Named Used as Valid | Hydrasterias improvisa |
| Locality | |
| Distribution | Eastern Pacific. |