#sand_dollar  flattened disklike sea urchins that live on sandy bottoms
  supertype:  #sea_urchin__seaurchin  shallow-water echinoderms having soft bodies enclosed in thin spiny globular shells
  member of:  #order_Exocycloida__Exocycloida  flat sea urchins
     member of:  #class_Echinoidea__Echinoidea  sea urchins and sand dollars
        member of:  #phylum_Echinodermata__Echinodermata  radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers
           member of:  #kingdom_Animalia__Animalia__animal_kingdom  taxonomic kingdom comprising all living or extinct animals

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