Phascolosomatidea
Sign in to savePhascolosomatidea is a subclass of the class Sipuncula, the peanut worms, containing two orders:-
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Phascolosomatidea is a subclass of the class Sipuncula, the peanut worms, containing two orders:- Aspidosiphonida containing the single family Aspidosiphonidae Phascolosomatida containing the single family Phascolosomatidae
Their hooks are arranged in regular rings.
Excerpted from Wikipedia’s “Phascolosomatidea” article, available under the CC BY-SA 4.0 licence.
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