The priapuliens are a Embranchement of marine worms having an extensible thorny horn. One knows fossils of them dating from the average Cambrien. Their more close relatives are probably the Kinorhyncha and the Loricifera, with which they constitute the Taxon Scalidophora.

Classification

Families
  • Maccabeidae
  • Priapulidae
  • Tubiluchidae

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