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Relations of the new phylum Cycliophora

Author

Listed:
  • B. M. H. Winnepenninckx

    (Royal Belgian Institute of Natural Sciences)

  • T. Backeljau

    (Royal Belgian Institute of Natural Sciences)

  • R. M. Kristensen

    (Zoological Museum, University of Copenhagen)

Abstract

The Cycliophora is the most recently described animal phylum and is based on a single species, Symbion pandora, which was discovered on the mouthparts of the Norway lobster Nephrops norvegicus1. Because only a few morphological data1,2,3 are available for Symbion, the precise nature of its phylogenetic relationships is highly controversial2,4,5. Here we present a phylogenetic analysis of 18S ribosomal RNA sequence data, including a new Symbion sequence, which places Symbion in a lophophorate-aschelminth-protostome clade and which suggests a sister-group relationship between Cycliophora and a Rotifera-Acanthocephala clade.

Suggested Citation

  • B. M. H. Winnepenninckx & T. Backeljau & R. M. Kristensen, 1998. "Relations of the new phylum Cycliophora," Nature, Nature, vol. 393(6686), pages 636-638, June.
    • Handle: RePEc:nat:nature:v:393:y:1998:i:6686:d:10.1038_31377
    DOI: 10.1038/31377
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