#order_Exocycloida__Exocycloida  flat sea urchins
  supertype:  #animal_order  the order of animals
  member of:  #class_Echinoidea
  member:  #sand_dollar  flattened disklike sea urchins that live on sandy bottoms

No statement uses or specializes #order_Exocycloida; click here to add one.