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Mol Biol Evol. 1995 Nov;12(6):1132-7.

18S rRNA data indicate that Aschelminthes are polyphyletic in origin and consist of at least three distinct clades.

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Departement Biochemie, Universiteit Antwerpen (UIA).


The Aschelminthes is a collection of at least eight animal phyla, historically grouped together because the absence of a true body cavity was perceived as a pseudocoelom. Analyses of 18S rRNA sequences from six Aschelminth phyla (including four previously unpublished sequences) support polyphyly for the Aschelminthes. At least three distinct groups of Aschelminthes were detected: the Priapulida among the protostomes, the Rotifera-Acanthocephala as a sister group to the protostomes, and the Nematoda as a basal group to the triploblastic Eumetazoa.

[Indexed for MEDLINE]

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