Priapulida
Los priapulians son un embrancament de vèrms marins qu'an una trompa espinosa extensibla.
Se ne coneis de fossils datant del Cambrian mejan. Lors parents mai pròches son probablament los kinorhyncha e los loricifera, amb los quals constituisson lo taxon Scalidophora.
Classificacion
Familhas
- Maccabeidae
- Priapulidae
- Tubiluchidae
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