Helicoplacoidea

Helicoplacoidea
Temporal range: Middle Cambrian–Late Cambrian
The holotype specimen of Helicoplacus guthi[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Echinodermata
Class:
†Helicoplacoidea

Helicoplacoidea is an extinct class within the Echinodermata. All known taxa were discovered in sediments dating back to the Cambrian.[1][2]

  1. ^ a b Durham, J. W.; Caster, K. E. (17 May 1963). "Helicoplacoidea: A New Class of Echinoderms". Science. 140 (3568): 820–822. Bibcode:1963Sci...140..820D. doi:10.1126/science.140.3568.820. PMID 17746435. S2CID 33443660.
  2. ^ Fossilworks: Helicoplacoidea. fossilworks.org. Retrieved 2021-01-13.