Exclusively marine invertebrates with a distinctive five-part radial body symmetry as adults, a calcium-carbonate endoskeleton just beneath the skin, and a unique water-vascular system of fluid-filled canals used for movement and feeding. Echinodermata includes sea stars, sea urchins, brittle stars, sea cucumbers and feather stars.
Facts
Disputed
Member Species/Taxa CountApproximate described-species (or, for a genus, described-taxon) count; continually revised as species are newly described, reclassified or synonymized. Taxonomic Rank Scientific Name Classification
Living or Extinct Connections
Child Taxon Of
Parent Taxon Of
Source Wikidata: Ophiuroidea
Source Wikidata: Crinoidea
Source Wikidata: Holothuroidea
Sources
1. Wikidata (taxon extant/extinct status)
Wikimedia Foundation / Wikidata contributorsQ44631, descriptionView the Source 2. Catalogue of Life
Wikidata: Echinodermata
Wikidata: Holothuroidea
Parent Taxon Of: Sea Cucumber, Wikidata parent-taxon (P171) chainView the Source Wikidata: Ophiuroidea
Parent Taxon Of: Brittle Star, Wikidata parent-taxon (P171) chainView the Source Wikidata: Crinoidea
Parent Taxon Of: Feather Star, Wikidata parent-taxon (P171) chainView the Source Wikipedia: Echinoderm
WikipediaIn Group: Major Animal Phyla, LeadQuote, In Group: Major Animal Phyla, Lead
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 larvae, as adults echinoderms are recognisable by their usually five-pointed radial
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