Systematic status of Campydora Cobb, 1920 (Nematoda: Campydorina)

Peter G. Mullin, Timothy S. Harris, Thomas O. Powers

Research output: Contribution to journalReview articlepeer-review

21 Scopus citations


The systematic position of Campydora Cobb, 1920, which possesses many unique morphological features, especially in pharyngeal structure and stomatal armature, has long been a matter of uncertainty with the 'position of the Campydorinae' (containing only Campydora) being questionable. A review of the morphology of C. demonstrans, the only nominal species of Campydora concluded that the species warranted placement as the sole member of a monotypic suborder, Campydorina, in the order Dorylaimida. Others placed Campydorina in the order Enoplida. We conducted phylogenetic analyses, using 18s small subunit ribosomal DNA sequences generated from a number of taxa in the subclasses Enoplia and Dorylaimia, to evaluate these competing hypotheses. Although precise taxonomic placement of the genus Campydora and the identity of its closest living relatives is in need of further investigation, our analyses, under maximum parsimony, distance, and maximum likelihood criteria, unambiguously indicate that Campydora shares a common, more recent, ancestry with genera such as Alaimus, Pontonema, Tripyla and Ironus (Enoplida), rather than with any members of Dorylaimida, Mononchida or Triplonchida.

Original languageEnglish (US)
Pages (from-to)699-711
Number of pages13
Issue number5
StatePublished - 2003


  • 18s SSU rDNA
  • Campydora demonstrans
  • Campydorina
  • Dorylaimida
  • Enoplida
  • Phylogeny

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Agronomy and Crop Science


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