Literature
- Gibson, R. & E.W. Knight-Jones 1990. Platyhelminthes, nematoda, and nemertea. In: P.J. Hayward & J.S. Ryland (eds), The Marine Fauna of the British Isles and North-West Europe. Vol. 1, Introduction and Protozoans to Arthropods. Clarendon Press, Oxford, 181-200.