Eric Walker added Xiphosura - Wikipedia to Xiphosura

Eric Walker added Horseshoe crabs to Xiphosurida, and added Xiphosurida to Xiphosura

Eric Walker added Xiphosurida and Xiphosura - Wikipedia to Xiphosura, and added Xiphosura to Chelicerata

Eric Walker added Arachnida and Xiphosura and Chelicerata - Wikipedia to Chelicerata, and added Chelicerata to Arthropoda