Wikipedia
Sipunculidea
Sipunculidea is a class of marine peanut worms. The tentacles form a circle around the mouth whereas those of the sister taxon, Phascolosomatidea, are only found above the mouth. Most species burrow in the substrate but some live in the empty shells of gastropods.
There are two orders:
- Golfingiiformes
- Sipunculiformes