Priapulida

Scientific classification

Kingdom:	Animalia
Subkingdom:	Metazoa
Phylum:	Priapulida

Priapulida (priapulid worms, or "penis worms") are a phylum of marine worms with an extensible spiny proboscis. Priapulid fossils are known at least as far back as the Middle Cambrian.

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