< Animal Phyla 
Sipunculus nudus, a peanut worm.
- Sipuncula
- Name Meaning: Small tube
- English Common Name: Peanut worms
- Major distinguishing characteristics: Mouth surrounded by invertible tentacles
- Approximate number of species described: 144-320
Natural History
Taxonomy
Anatomy
The Fossil Record
Quiz
- Sipuncula Quiz
References and Further Reading
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