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You aren't what you eat

An obscure marine worm does not belong among the molluscs, as had been thought. Rather, it has a claim to being the most primitive extant member of the group of animals that includes vertebrates.

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Figure 1: Spot the ordinary flower-girl.


Figure 2: A place for Xenoturbella among the deuterostomes.


  1. Norén, M. & Jondelius, U. Nature 390, 31–32 (1997).

    ADS  Article  Google Scholar 

  2. Israelsson, O. Nature 390, 32 (1997).

    ADS  CAS  Article  Google Scholar 

  3. Bourlat, S. J., Nielsen, C., Lockyer, A. E., Littlewood, D. T. J. & Telford, M. J. Nature 424, 925–928 (2003).

    ADS  CAS  Article  Google Scholar 

  4. Shu, D.-G. et al. Nature 414, 419–424 (2001).

    ADS  CAS  Article  Google Scholar 

  5. Lowe, C. J. et al. Cell 113, 853–865 (2003).

    CAS  Article  Google Scholar 

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  1. Henry Gee is a senior editor at Nature.

    • Henry Gee

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Gee, H. You aren't what you eat. Nature 424, 885–886 (2003).

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