Helicocystis

Helicocystis; Temporal range: Miaolingian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Stem group:	Echinodermata
Family:	† Helicocystitidae
Genus:	† Helicocystis
Species:	†H. moroccoensis
Binomial name
	†Helicocystis moroccoensis; Smith & Zamora, 2013

Last updated September 29, 2025

Helicocystis is a stalked, spiralling pentaradial echinoderm known from the Cambrian Jbel Wawrmast Formation.

References

↑ Smith, A. B.; Zamora, S. (2013). "Cambrian spiral-plated echinoderms from Gondwana reveal the earliest pentaradial body plan". Proceedings of the Royal Society B: Biological Sciences. 280 (1765) 20131197. doi:10.1098/rspb.2013.1197. PMC 3712455 . PMID 23804624.

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[1] Smith, A. B.; Zamora, S. (2013). "Cambrian spiral-plated echinoderms from Gondwana reveal the earliest pentaradial body plan". Proceedings of the Royal Society B: Biological Sciences. 280 (1765) 20131197. doi:10.1098/rspb.2013.1197. PMC 3712455 . PMID 23804624.

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