(Probactrosaurus_gobiensis,(Bactrosaurus_johnsoni,(((Parasaurolophus_walkeri,Olorotitan_arharensis),(Wulagasaurus_dongi,((Acritavus_gaglarsoni,(Maiasaura_peeblesorum,Brachylophosaurus_canadensis)),(Kritosaurus_navajovius,(Gryposaurus_notabilis,Gryposaurus_monumentensis,Gryposaurus_latidens),(Kerberosaurus_manakini,Kundurosaurus_nagornyi,((Prosaurolophus_maximus,Prosaurolophus_blackfeetensis),(Saurolophus_osborni,Saurolophus_angustirostris)),(Edmontosaurus_annectens,Edmontosaurus_regalis)))))),(Hadrosaurus_foulkii,Lophorhoton_atopus))));