Conifers and other gymnosperms evolved during this period, replacing the swamp forests of the carboniferous period.
The Wuchiapingian stage and Changhsingian stage form the Longpingian system, the last epoch of this period. Metabolically active reptiles called therapsids flourished during this period, and ammonids are widespread in this period's fossil record. Conifers and other gymnosperms evolved during this period, replacing the swamp forests of the carboniferous period. For 10 points, name this geological period which immediately preceded the Triassic and ended with natural history's largest extinction event.
The Wuchiapingian stage and Changhsingian stage form the Longpingian system, the last epoch of this period.
{Permian} Period