Arthropoda Siebold, 1848 - arthropods
   Euarthropoda
     Subphylum Chelicerata Heymons, 1901
       Euchelicerata Weygoldt & Paulus, 1979
         1 Genus †Offacolus Orr, Siveter, Briggs, Siveter & Sutton, 2000
         2 Prosomapoda Lamsdell, 2013