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

B Winnepenninckx, T Backeljau, L Y Mackey, J M Brooks, R De Wachter, S Kumar, J R Garey

Research output: Contribution to journalArticlepeer-review

153 Scopus citations

Abstract

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 Analyses of 18S rRNA sequences from six Aschelminth phyla (including four previously unpublished sequences) support polyphyly for the Aschelminthes.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.

Original languageEnglish
Pages (from-to)1132-1137
Number of pages6
JournalMolecular Biology and Evolution
Volume12
Issue number6
DOIs
StatePublished - Nov 1995

Keywords

  • Acanthocephala/genetics
  • Animal Population Groups/genetics
  • Animals
  • Biological Evolution
  • Digestive System/anatomy & histology
  • Evolution, Molecular
  • Genes, Helminth
  • Helminths/anatomy & histology
  • Molecular Sequence Data
  • Nematoda/genetics
  • Phylogeny
  • RNA, Helminth/genetics
  • RNA, Ribosomal, 18S/genetics
  • Rotifera/genetics
  • Saccharomyces cerevisiae/genetics
  • Sequence Alignment
  • Sequence Homology, Nucleic Acid
  • Species Specificity

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