Phylum Priapulida Théel 1906 (priapulid worm)
Parent taxon: Scaldiphora according to H. Zhang et al. 2015
See also Edgecombe et al. 2011 and Sepkoski 2002
Sister taxon: Priapula
Subtaxa: Acosmia Archaeopriapulida Archotuba Corynetis Eximipriapulus Halicryptidae Maccabeidae Omnidens Palaeoscolecidomorpha Priapulidae Priapulomorpha Selkirkiimorpha Sicyophorus Tubiluchidae Xiaoheiqingidae
Ecology: facultatively mobile shallow infaunal carnivore