| Reference no. | Description | year | Name used | Page |
|---|---|---|---|---|
| 80553 | Branch, G.M., C.L. Griffiths, M.L. Branch and L. Beckley 2005 Two oceans: a guide to marine life in southern Africa. Struik Publishers, Cape Town, 360 p. | 2005 | Hydractinia altispina | 34 |
| 8278 | Bouillon, J., C. Gravili, F. Pagès, J.-M. Gili and F. Boero 2006 An introduction to Hydrozoa. Mémoires du Muséum national d'Histoire naturelle 194:1-591. | 2006 | Hydractinia altispina | --> |