Mesozoic Era Classification: Dinosaurs flourished from the Late Triassic (~233 Ma) until the Cretaceous–Paleogene extinction event (~66 Ma).
1. Major Clades: Theropoda (carnivores/birds), Sauropodomorpha (long-necked herbivores), and Ornithischia (armored/horned).
2. Database Search: Type any genus name to query taxonomic hierarchy and geological epoch.