#genus_Limulus__Limulus  type genus of the family Limulidae
  supertype:  arthropod_genus  a genus of arthropods
  member of:  family_Limulidae
  member:  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

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