Eric Walker added Sphenacodontoidea to Sphenacodontia, and added Sphenacodontia to Sphenacomorpha

Eric Walker added Sphenacodontia to Sphenacomorpha, and added Sphenacomorpha to Haptodontiformes

Eric Walker added Sphenacomorpha to Haptodontiformes, and added Haptodontiformes to Eupelycosauria