Arthropoda Siebold, 1848 - arthropods Euarthropoda Subphylum Chelicerata Heymons, 1901 Euchelicerata Weygoldt & Paulus, 1979 Prosomapoda Lamsdell, 2013 Planaterga Lamsdell, 2013 Dekatriata Lamsdell, 2013 1 Sclerophorata Kamenz, Staude & Dunlop, 2011 2 †Chasmataspidida Caster & Brooks, 1956