Hallucigenia’s head and the pharyngeal armature of early ecdysozoans

  title={Hallucigenia’s head and the pharyngeal armature of early ecdysozoans},
  author={Martin R Smith and Jean-Bernard Caron},
The molecularly defined clade Ecdysozoa comprises the panarthropods (Euarthropoda, Onychophora and Tardigrada) and the cycloneuralian worms (Nematoda, Nematomorpha, Priapulida, Loricifera and Kinorhyncha). These disparate phyla are united by their means of moulting, but otherwise share few morphological characters—none of which has a meaningful fossilization potential. As such, the early evolutionary history of the group as a whole is largely uncharted. Here we redescribe the 508-million-year… CONTINUE READING
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