#family_Cardiidae__Cardiidae  somewhat heart-shaped sand-burrowing bivalve mollusks
  supertype:  mollusk_family__molluskfamily  a family of mollusks
  member of:  class_Bivalvia
  member:  genus_Cardium__Cardium  type genus of the family Cardiidae: cockles
     member:  cockle  common edible European bivalve mollusk having a rounded shell with radiating ribs

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