Eric Walker added Redlichiida and Corynexochida and a number of links to Trilobites, and added Trilobites to Trilobitomorpha

Eric Walker added Trilobites to Trilobitomorpha, and added Trilobitomorpha to Artiopoda

Eric Walker added Trilobitomorpha and Vicissicaudata to Artiopoda, and added Artiopoda to Arthropoda