echinoidea

1. Sea urchins and sand dollars (synset 102321567)
   is a type of: class - (biology) a taxonomic group containing one or more orders
   member holonym:

   • sea urchin - shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells
   • exocycloida, order exocycloida - flat sea urchins
   • order spatangoida, spatangoida - heart-shaped sea urchins
   belongs to: echinodermata, phylum echinodermata - radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers
   same as: class echinoidea

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