Eric Walker added Dicynodontia and Eutherapsida and Therapsid - Wikipedia to Therapsida, and added Therapsida to Sphenacodontoidea

Eric Walker added Lystrosaurus to Lystrosauridae, and added Lystrosauridae to Dicynodontia

Eric Walker added Lystrosauridae to Dicynodontia, and added Dicynodontia to Therapsida