''Helicocystis'' is a stalked, spiralling pentaradial
echinoderm
An echinoderm () is any animal of the phylum Echinodermata (), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While bilaterally symmetrical as ...
known from the Cambrian
Jbel Wawrmast Formation.
References
Prehistoric echinoderm genera
Helicoplacoidea
{{Paleo-echinoderm-stub