Contact: Kristin Elise Phillips
American Museum of Natural History
Caption: The 250 million year old footprints of Prorotodactylus isp. from the Early Olenekian of Stryczowice, Poland show reduced digits I and V and parallel three middle digits, traits of the dinosaur-lineage. The gait, though, was quadrapedal. These are the oldest known fossils of the dinosaur lineage.
Credit: Grzegorz Niedźwiedzki
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