#family_Fissurellidae__Fissurellidae  marine limpets
  supertype:  #mollusk_family__molluskfamily  a family of mollusks
  member of:  #class_Gastropoda
  member:  #genus_Fissurella__Fissurella  type genus of the family Fissurellidae: keyhole limpets
     member:  #keyhole_limpet__keyholelimpet__Fissurella_apertura__Diodora_apertura  marine limpet having a conical shell with an opening at the apex

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