#horseshoe_crab__horseshoecrab__king_crab__Limulus_polyphemus__Xiphosurus_polyphemus  large marine arthropod of the American Atlantic coast having a domed horseshoe-shaped carapace and stiff pointed tail; a living fossil related to the wood louse
  supertype:  arthropod  invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
  member of:  genus_Limulus__Limulus  type genus of the family Limulidae
     member of:  family_Limulidae__Limulidae  horseshoe crabs
        member of:  order_Xiphosura__Xiphosura  horseshoe crabs and extinct forms
           member of:  class_Merostomata__Merostomata  used in some classifications; includes the orders Xiphosura and Eurypterida
              member of:  superclass_Chelicerata__Chelicerata  spiders; scorpions; horseshoe crabs
                 member of:  phylum_Arthropoda__Arthropoda  jointed-foot invertebrates: arachnids; crustaceans; insects; millipedes; centipedes
                    member of:  kingdom_Animalia__Animalia__animal_kingdom  taxonomic kingdom comprising all living or extinct animals

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