Kingdom: Animalia - Phylum: Arthropoda - Subphylum: Chelicerata - Class: Merostomata[2] - Order: Xiphosura - Family: Limulidae - Genus: Limulus - Species: L. polyphemus
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![Kingdom: Animalia - Phylum: Arthropoda - Subphylum: Chelicerata - Class: Merostomata[2] - Order: Xiphosura - Family: Limulidae - Genus: Limulus - Species: L. polyphemus](image_science_archive_68/040506_68/329700_Horseshoe_crab_female_68.jpg)