| Authors(s) | Knight-Jones, E.W. & J.S. Ryland |
| Year | 1990 |
| Title | Priapulida, Sipuncula, Echiura, Pogonophora, and Entoprocta. In: The Marine Fauna of the British Isles and North-West Europe. (ed. P.J. Hayward & J.S. Ryland). Clarendon Press, Oxford. |
| Authors(s) | Knight-Jones, E.W. & J.S. Ryland |
| Year | 1990 |
| Title | Priapulida, Sipuncula, Echiura, Pogonophora, and Entoprocta. In: The Marine Fauna of the British Isles and North-West Europe. (ed. P.J. Hayward & J.S. Ryland). Clarendon Press, Oxford. |