jan 13, 220844445 BC - Formation of the Supercontinent Pangaea
Description:
First true mammals appeared: Eozostrodon, Theriodontia, tiny and nocturnal. Earliest-know turtle, Proganochelys. Turtles, frogs, salamanders, lizards (sphenodonts & snakes), pterosaurs appeared. Insects undergo complete metamorphosis. In the seas, ichthyosaurs, marine reptiles appeared. Seed ferns dominate the Triassic terrain. Laurasia was dominated by conifers, and Gondwanaland was dominated by Dicroidium
Added to timeline:
Mesozoic Era
STEM-2A Biology
Date:
