Kingdom [Animalia] Linnaeus, 1758 - animals
Subkingdom Metazoa Haeckel, 1874
see Kingdom Animalia Linnaeus, 1758
Division Eumetazoa Butschli, 1910
see Subkingdom Eumetazoa Butschli, 1910
Subdivision Bilateralia
Superphylum Articulata Cuvier
see Supraphylum Articulata Cuvier
Phylum Arthropoda Siebold, 1848 - arthropods
Subphylum Chelicerata Heymons, 1901
Class Merostomata Dana, 1852 - horseshoe crabs
see Class Xiphosura Latreille, 1802
Order †Gigantostraca Haeckel, 1896
see Class Eurypterida Burmeister, 1843
Family †Eurypteridae Burmeister, 1843