Definition of Priapulida in US English:


plural noun

  • A small phylum of burrowing wormlike marine invertebrates that have a thick body, a large eversible proboscis, and a terminal tail.

    • ‘Loricifera, Priapulida, and Kinorhyncha are unequivocally assumed to be most closely related and are, therefore, united in one group, named Scalidophora first by Lemburg.’
    • ‘They concluded that Gastrotricha is the sister-taxon of a monophyletic clade comprising Nematoda, Nematomorpha, Priapulida, Kinorhyncha and Loricifera.’
    • ‘The phylum Loricifera shares many apomorphic characters with both Priapulida and Kinorhyncha, and can be included in the taxon Scalidophora, a subgroup of Cycloneuralia.’
    • ‘The oldest known ‘aschelminth’ phylum is the Priapulida.’
    • ‘The fine structure of the mouth cone, the introvert with scalids, and the circumenteric brain indicate that this meiofaunal phylum is monophyletic, related to Kinorhyncha and Priapulida.’


Modern Latin (plural), from Priapulus (genus name), diminutive of Priapus.