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Hallucigenia's head

The finding of pharyngeal teeth and circumoral mouthparts in fossils of the Cambrian lobopodian animal Hallucigenia sparsa improves our understanding of the deep evolutionary links between moulting animals. See Letter p.75

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Figure 1: The Ecdysozoa.


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  1. Edgecombe, G. D. & Legg, A. D. in Arthropod Biology and Evolution (eds Minelli, A. et al.) 393–415 (Springer, 2013).

    Book  Google Scholar 

  2. Smith, M. R. & Caron, J.-B. Nature 523, 75–78 (2015).

    ADS  CAS  Article  Google Scholar 

  3. Telford, M. J., Bourlat, S. J., Economou, A., Papillon, D. & Rota-Stabelli, O. Philos. Trans. R. Soc. London Ser. B 363, 1529–1537 (2008).

    Article  Google Scholar 

  4. Aguinaldo, A. M. et al. Nature 387, 489–493 (1997).

    CAS  Article  Google Scholar 

  5. Conway-Morris, S. Spec. Pap. Palaeontol. 20, 1–95 (1977).

    Google Scholar 

  6. Ramsköld, L. & Hou, X. Nature 351, 225–228 (1991).

    ADS  Article  Google Scholar 

  7. Hou, X. G., Ma, X. Y., Zhao, J. & Bergström, J. Lethaia 37, 235–244 (2004).

    Article  Google Scholar 

  8. Vannier, J., Liu, J., Lerosey-Aubril, R., Vinther, J. & Daley, A. C. Nature Commun. 5, 3641 (2014).

    ADS  CAS  Article  Google Scholar 

  9. Smith, M. R. & Ortega-Hernández, J. Nature 514, 363–366 (2014).

    ADS  CAS  Article  Google Scholar 

  10. Dewel, R. A. & Eibye-Jacobsen, J. Hydrobiologia 558, 41–51 (2006).

    Article  Google Scholar 

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Correspondence to Xiaoya Ma.

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Ma, X. Hallucigenia's head. Nature 523, 38–39 (2015).

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