Footprints of primitive reptiles and amphibians from 280 million years ago

Researchers have identified various tracks made by tetrapods between 280 and 290 million years ago, which makes them the most ancient fossil footprints in Catalonia. They correspond to different groups of primitive reptiles and amphibians, among which are synapsids, the group that would later give rise to the mammals.
Paleontology News — ScienceDaily

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