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.

    • ‘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.’
    • ‘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.’


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