are the results of: Cau (2018, parsimony results): Cau (2018, bayesian results): Ezcurra et al. (2020): Müller and Garcia (2020): A variety of individual species and taxa have at times been found to place within Dinosauromorpha and its subgroups, but outside Dinosauria. The taxon Marasuchus has been consistently recovered as a dinosauromorph between lagerpetids and silesaurids, but may also be a junior synonym of the coexisting form Lagosuchus, another dinosauromorph. Pisanosaurus, traditionally considered an ornithischian, was recovered in an unpublished analysis as a dinosauriform outside other clades, but has since been recovered only as a member of Silesauridae or Ornithischia. Saltopus, an enigmatic taxon from the Late Triassic of Scotland, has been placed closer to dinosaurs than Marasuchus, in a polytomy with Silesauridae and Dinosauria, as a sister taxon to Marasuchus, or within Dinosauria as a basal saurischian. The British taxon Agnosphitys was originally described as a dinosauriform closer to Dinosauria than Herrerasaurus, but has also been classified as a dinosauriform more derived than silesaurids but basal to Herrerasauridae and Dinosauria, a silesaurid, or a basal saurischian. The genus Nyasasaurus from the early Late Triassic of Tanzania is known from multiple incomplete specimens, making it difficult to classify. It has been found as the direct sister taxon of Dinosauria, the basalmost ornithischian, a basal theropod, or a deeply-nested sauropodomorph. Origins Dinosauromorphs appeared putatively around 242 to 244 million years ago by the Anisian stage of the Middle Triassic, splitting from other ornithodires. Early Triassic footprints reported in October 2010 from the Świętokrzyskie (Holy Cross) Mountains of Poland may belong to a dinosauromorph. If so, the origin of dinosauromorphs would be pushed back into the Early Olenekian, around 249 Ma. The oldest Polish footprints are from a small quadrupedal animal named Prorotodactylus, but footprints belonging to the ichnogenus Sphingopus that have been found from Early Anisian strata show that moderately large bipedal dinosauromorphs had appeared by 246 Ma. The tracks show that the dinosaur lineage appeared soon after the Permian-Triassic extinction event. Their age suggests that the rise of dinosaurs was slow and drawn out across much of the Triassic. The oldest known dinosauromorph is Asilisaurus, a silesaurid which may have lived as early as the Anisian age of the middle Triassic period, about 245 million years ago, although it is possible that Nyasasaurus is a dinosaur of the same age, pushing the origins of the groups back further. Putative basal