Helicoplacoidea

Helicoplacoidea; Temporal range:
	The holotype specimen of Helicoplacus guthi
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	†Helicoplacoidea
	†Helicoplacus; †Polyplacus; †Waucobella;

Helicoplacoidea is an extinct class within the Echinodermata. All known taxa were discovered in sediments dating back to the Cambrian.

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