Chelicerata Heymons, 1901 Xiphosura s. lat. Latreille, 1802 - horseshoe crabs see Class Xiphosura Latreille, 1802 Prosomapoda Lamsdell, 2013 Family †Weinberginidae Richter & richter, 1929 [monotypic] 1 Genus †Weinbergina Richter & Richter, 1929