SeymouriidaeSynapsidaParareptiliaCaptorhinidaeAraeoscelidiaRhynchocephaliaSquamataProlacertaTanystropheusTrilophosaurusRhynchosauriaArchosauriformesChoristoderaPachypleurosaursSimosaurusPlacodusPistosauridaeClaudiosaurusAskeptosaurusClaraziaThalattosaurusTestudinesPalaeagamaSaurosternonCoelurosauravusYounginiformesMacrocnemusHelveticosaurusApsisaurusIchthyopterygiaKuehneosauridaeDrepanosauridaeHupehsuchusCzatkowiellaProtorosaurusOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Borsuk-Bialynicka_et_Evans_2009ab