Phascolosomatidea

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

Phascolosomatidea
Phascolosoma turnerae
Scientific classification
Kingdom:	Animalia
Phylum:	Annelida
Class:	Sipuncula
Subclass:	Phascolosomatidea
Orders
Aspidosiphonida Phascolosomatida

Their hooks are arranged in regular rings.^[3]