Discover the Anisian Stage (247.2–242 Ma) and explore the the earliest Middle Triassic subdivision marking Earth’s recovery after the Permian–Triassic extinction. Explore how warm greenhouse climates, rising seas, and stable ecosystems enabled the first Triassic reefs, carbonate platforms, ammonoids, conodonts, marine reptiles, and early archosaurs to flourish. Learn its origin in Austria, GSSP in Romania, and its pivotal role in Mesozoic biodiversity.