Priapulida (priapulid or penis worms) are a phylum of marine worms. Their name refers to their extensible spiny proboscis, which, in some species, may...

scientists place it in a clade called Cycloneuralia which places them with Priapulid worms, Loricifera, and the Mud dragons. "articulata". Archived from the...

include: Annelids, nematodes, platyhelminthes, ribbon worms, arrow worms, priapulid worms, and some insect larvae. They are all animals which may be called...