Eric Walker added Eurypterida to Chelicerata

Eric Walker added Chelicerata - Wikipedia to Chelicerata

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

Eric Walker added a number of topics and Arachnid - Wikipedia to Arachnida, and added Arachnida to Chelicerata

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

Eric Walker added a number of topics and a number of links to Arthropoda, and added Arthropoda to Ecdysozoa