Surf these sites: Chaetonotus -- A series of photographs of the gastrotrich, Chaetonotus. Evolutionary Relationships of Rotifers and Acanthocephalans -- A review of various proposed cladograms showing the interrelationships of the pseudocoelomates. Introduction to the "Aschelminth" Phyla -- Berkeley''s introduction to the pseudocoelomate or "Aschelminth" group of phyla. Phylum Acanthocephala -- A thorough outline of the biology of Acanthocephala, including their features, reproduction and life cycle, ecology, and classification.
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