#order_Xiphosura__Xiphosura horseshoe crabs and extinct forms
supertype: animal_order the order of animals
member of: class_Merostomata
member: family_Limulidae__Limulidae horseshoe crabs
member: genus_Limulus__Limulus type genus of the 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
member: genus_Tachypleus__Tachypleus a genus of Limulidae
member: Asian_horseshoe_crab horseshoe crab of the coast of eastern Asia
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