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.

单词	Sipunculidea
释义	Sipunculidea 英语百科 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.
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