The oldest Polish footprints are classified in the ichnogenus Prorotodactylus and were made by an unknown small quadrupedal animal, but footprints called Sphingopus, 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.
The oldest known footprints in Poland belong to an unknown small quadrupedal animal classified as Prorotodactylus. However, Sphingopus footprints from Early Anisian strata suggest that bipedal dinosauromorphs appeared around 246 million years ago. These findings indicate the dinosaur lineage emerged shortly after the Permian-Triassic extinction event.