Hallucigenia’s head and the pharyngeal armature of early ecdysozoans

Martin R. Smith () and Jean-Bernard Caron
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Martin R. Smith: University of Cambridge
Jean-Bernard Caron: Royal Ontario Museum

Nature, 2015, vol. 523, issue 7558, 75-78

Abstract: A re-analysis of the 508-million-year-old stem-group onychophoran Hallucigenia sparsa from the Burgess Shale shows that its anterior gut has structures that indicate evolutionary links with more disparate phyla such as nematodes and kinorhynchs; Hallucigenia now provides concrete evidence of structures that might have existed in the last common ancestor of the Ecdysozoa, previously a matter of conjecture.

Date: 2015
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DOI: 10.1038/nature14573

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