This concept that "dinosaur" was an outdated term for two distinct orders lasted many decades in the scientific and popular literature, and it was not until the 1960s that scientists began to again consider the possibility that saurischians and ornithischians were more closely related to each other than they were to other archosaurs.
Ovaj koncept da je dinosaurus zastareli izraz za dva različita reda se zadržao tokom mnogih decenija u naučnoj i popularnoj literaturi, sve dok tokom 1960-tih naučnici nisu počeli da razmatraju mogućnost da su Saurischia i Ornithischia srodniji jedni drugima nego arhosaurima.