Acanthocephala

A Dictionary of Zoology | Date: 1999

Acanthocephala (thorny-headed worms) A phylum of bilaterally symmetrical, pseudocoelomate, worm-like organisms most of which do not have an excretory system; all lack a gut. A retractable proboscis is present, covered with the recurved spines that give the animals their common name. All acanthocephalans are endoparasitic, living in two or three marine or terrestrial vertebrates during their development. There are about 600 species.


© A Dictionary of Zoology 1999, originally published by Oxford University Press 1999.

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