Permian
geo:time:period:permianPermian Period (298.9–251.9 Ma): Pangaea fully assembled; diverse reptile fauna; ends with Permian–Triassic mass extinction (96% of species lost — largest in Earth history).
Permian Period (298.9–251.9 Ma): Pangaea fully assembled; diverse reptile fauna; ends with Permian–Triassic mass extinction (96% of species lost — largest in Earth history).