Sipunculans are non-segmented worm-like organisms that have a retractable part at the front, called introvert which allows them to bury themselves in the sediment. The mouth
lies at the end of the introvert.
Aspidosiphon (Aspidosiphon) muelleri muelleriShield-bearing peanut worm
Golfingia (Golfingia) elongataLeather peanut worm
Sipunculus (Sipunculus) nudusSipuncle
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