[Phylum] [Arthropoda] Siebold, 1848 - arthropods Chelicerata Heymons, 1901 Euchelicerata Weygoldt & Paulus, 1979 [Order] †Chasmataspidida Caster & Brooks, 1956 Family †Diploaspididae Størmer, 1972 Genus †Hoplitaspis Lamsdell, Gunderson & Meyer, 2019