Unsegmented, bilaterally symmetrical, ciliated acoelomate worms, with separate mouth and anus, a closed blood system, and an eversible muscular
Scientific synonyms and common names
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.
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