Melanochelys_trijugaMalacochersus_tornieriRhinoclemmys_areolataMaiasaura_peeblesorumTitanosaurian_sauropodAlligator_mississippiensisCrocodylus_niloticusOviraptoridTroodon_formosusNew_Two_Medicine_eggCretaceous_birdStruthio_spLourinhanosaurusGallus_gallusEgg and shellMaximum ParsimonyBased on reanalysis of the original matrix.Varricchio_et_Jackson_2004a