#order_Exocycloida__Exocycloida  flat sea urchins
  supertype:  #animal_order  the order of animals
  member:  #sand_dollar
  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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