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Phascolosomatidea is a subclass of the class Sipuncula, the peanut worms,[1] containing two orders:-[2]
- Aspidosiphonida containing the single family Aspidosiphonidae
- Phascolosomatida containing the single family Phascolosomatidae
Their hooks are arranged in regular rings.[3]
References
- ^ Shen, X.; Ma, X.; Ren, J.; Zhao, F. (2009). "A close phylogenetic relationship between Sipuncula and Annelida evidenced from the complete mitochondrial genome sequence of Phascolosoma esculenta". BMC Genomics. 10: 136. doi:10.1186/1471-2164-10-136. PMC 2667193. PMID 19327168.
- ^ "Phascolosomatidea". WoRMS. World Register of Marine Species. 2018. Retrieved 6 December 2018.
- ^ Cutler, Edward Bayler (1994). The Sipuncula: Their systematics, biology, and evolution. Cornell University Press. ISBN 978-0-8014-2843-2.
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