Xiphosurus polyphemus


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Noun1.Xiphosurus polyphemus - large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tailXiphosurus polyphemus - large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail; a living fossil related to the wood louse
arthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
genus Limulus, Limulus - type genus of the family Limulidae