CheloniaBasal_diapsidsSquamataSphenodonBasal_archosauromorphsErythrosuchidaeParasuchiaAetosauriaProterochampsidaeCrocodyliaBasal_crocodylomorphsLagerpetonMarasuchusLewisuchusOrnithischiaSauropodomorphaHerrerasauridaeCoelophysoideaCeratosauriaBasal_tetanuransCarnosauriaTyrannosauroideaOrnithomimosauriaOviraptorosauriaAlvarezsauridaeDeinonychosauriaArchaeopteryxConfuciusornithidaeEnantiornithesPatagopteryxApsaravisHesperornithiformesIchthyornisPaleognathaeNeognathaeOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Hutchinson_2002a