Eric Walker added They Put the Bite in Trilobite - The New York Times and Horseshoe crab - Wikipedia to Horseshoe crabs, and added Horseshoe crabs to Xiphosurida

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