Echinoderm Classes is a Browse By group of the Nature Atlas that gathers the classes of echinoderms, sea stars, sea urchins, brittle stars, sea cucumbers and crinoids. An entry belongs here when its own cited article states that it is a class of echinoderms. It excludes classes of other animal phyla. Members are placed by the classification their cited article gives, not by common name or appearance alone.
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Echinoderm Classes
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Starfish (Wikipedia)
Has Member: Asteroidea, LeadQuote, Has Member: Asteroidea, Lead
Starfish or sea stars are a class of echinoderms generally shaped like a star polygon.
Sea urchin (Wikipedia)
Has Member: Echinoidea, LeadQuote, Has Member: Echinoidea, Lead
Sea urchins or urchins () are the class Echinoidea within the echinoderms.
Wikipedia: Brittle star
Has Member: Ophiuroidea, LeadQuote, Has Member: Ophiuroidea, Lead
Brittle stars, serpent stars, or ophiuroids (from Latin ophiurus 'brittle star'; from Ancient Greek ὄφις (óphis) 'serpent' and οὐρά (ourá) 'tail'; referring to the serpent-like arms of the brittle star) are echinoderms in the class Ophiuroidea.
Sea cucumber - Wikipedia
Has Member: Holothuroidea, LeadQuote, Has Member: Holothuroidea, Lead
Sea cucumbers are echinoderms from the class Holothuroidea ( HOL-ə-thyuu-ROY-dee-ə, HOH-lə-).
Wikipedia: Crinoid
WikipediaHas Member: Crinoidea, LeadQuote, Has Member: Crinoidea, Lead
Crinoids are marine invertebrates that make up the class Crinoidea.
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