Paleosaurus is an extinct genus of reptiles that lived during the late Triassic period, approximately 230 million years ago. It is classified as a member of the group known as archosaurs, which also includes modern birds and crocodiles. Fossils of Paleosaurus have been found primarily in Europe, providing insights into the early evolution of reptiles. This genus is characterized by its elongated body and long limbs, suggesting it was a semi-aquatic predator. Paleosaurus likely inhabited freshwater environments, where it preyed on fish and other small animals. Its adaptations indicate a lifestyle similar to that of modern crocodilians.