[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   Chelicerata Heymons, 1901
     Euchelicerata Weygoldt & Paulus, 1979
       [Order] †Chasmataspidida Caster & Brooks, 1956
         Family †Diploaspididae Størmer, 1972
           Genus †Nahlyostaspis Marshall, Lamsdell, Shpinev & Braddy, 2014