Chelicerata Heymons, 1901
   Xiphosura s. lat. Latreille, 1802 - horseshoe crabs see Class Xiphosura Latreille, 1802
     Prosomapoda Lamsdell, 2013
       Planaterga Lamsdell, 2013
         Family †Bunodidae Packard, 1886
           1 Genus †Bunodes Eichwald, 1854
           2 Genus †Limuloides Woodward, 1865
           3 Genus †Pasternakevia Selden & Drygant, 1987