AncestorMarginocephaliaHeterodontosauridaeA_multidensHypsilophodon_foxiiGasparinisaurus_cincosaltensisThescelosaurus_neglectusParksosaurus_warreniTenontosaurus_tillettiTenontosaurus_dossiDryosaurus_altusDryosaurus_lettowvorbeckiiCamptosaurus_disparIguanodon_atherfieldensisIguanodon_bernissartensisRhabdodon_priscusZalmoxes_robustusZalmoxes_shqiperorumOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Weishampel_etal_2003a