Kingdom [Animalia] Linnaeus, 1758 - animals
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   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
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     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
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       Subdivision Bilateralia
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         Superphylum Articulata Cuvier see Supraphylum Articulata Cuvier
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           Phylum Arthropoda Siebold, 1848 - arthropods
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             Subphylum Chelicerata Heymons, 1901
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               Class Merostomata Dana, 1852 - horseshoe crabs see Class Xiphosura Latreille, 1802
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                 Order Xiphosura Latreille, 1802 see Class Xiphosura Latreille, 1802
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                   Family Limulidae Leach, 1819
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                     Genus Limulus Müller, 1785
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                       Limulus polyphemus (Linnaeus, 1758) - horseshoe crab
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