Echinoida is an order of sea urchins in the class Echinoidea. They are distinguished from other sea urchins by simultaneously possessing both an un-sculpted test and a feeding lantern with large plates fused across the top of each pyramid.
Taxonomy Order Echinoida family Echinidae Gray, 1825 family Echinometridae Gray, 1825 family Parasaleniidae family Strongylocentrotidae Gregory, 1900
See also Colobocentrotus atratus - Shingle urchin Echinus acutus - White sea urchin Echinus esculentus - Common sea urchin Echinus tylodes Evechinus chloroticus - New Zealand sea urchin Heterocentrotus mammillatus - Red pencil urchin Heterocentrotus trigonarius - Slate pencil urchin Loxechinus albus - Chilean sea urchin
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