240-million-year-old reptile fossil reveals a lost chapter before dinosaurs and crocodiles
A 240-million-year-old fossil of a new reptile species, Silescelida acristata, discovered in Brazil, offers new insights into the evolutionary history of archosauriformes, the group that gave rise to archosaurs (crocodiles and dinosaurs). This discovery helps fill a significant gap in understanding terrestrial ecosystems shortly after the Permian-Triassic mass extinction event.
Long before dinosaurs ruled the continents and modern crocodiles first appeared, their ancestors were already going through a decisive phase in their evolutionary history. It was in this ancient world, shortly after the greatest mass extinction in Earth's history that a new species of fossil reptile discovered in the interior of Brazil's Rio Grande do Sul state .
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