A newly uncovered fossil has brought to light an ancient reptile species that predated the dinosaurs by more than 240 million years. Preliminary findings indicate it belongs to the lineage of lepidosaurs, a group that includes modern lizards, snakes, and the elusive tuatara. Until this discovery, the title of oldest lepidosaur was held by Wirtembergia, which lived between 3 and 7 million years later than Agriodontosaurus helsbypetrae. A Skull Full of SurprisesScientists were initially excited to examine the skull of this ancient creature, hoping to learn more about the evolution of lepidosaurs. Rewriting Lepidosaur EvolutionWhat makes this fossil so significant is not just its age, but the new questions it raises about the evolution of lepidosaurs.