Jurassic Period 208 to 146 mya Many dinosaurs, including the giant Sauropods . The first flowering plants evolve. Many ferns, cycads, gingkos, rushes, conifers, ammonites , and pterosaurs . Minor extinctions at 190 and 160 mya. Triassic Period 248 to 208 mya The first dinosaurs , mammals, and crocodyloformes appear.
Mollusks are the dominant invertebrate.
Many reptiles, for example, turtles, ichthyosaurs . True flies appear. This allowed the dinosaurs to expand into many niches. Gymnosperms dominant plant life. The continents merge into a single super-continent, Pangaea .