Gymnosperms dominant plant life. The continents merge into a single super-continent, Pangaea . Phtyoplankton and plants oxygenate the Earth's atmosphere to close to modern levels. The first stoneflies, true bugs, beetles, and caddisflies, The Permian ended with largest mass extinction . Carboniferous Wide-spread coal swamps , foraminiferans, corals, bryozoans, brachiopods, blastoids, seed ferns, lycopsids, and other plants.
Amphibians become more common.
360 to 280 mya Pennsylvanian Period 325 to 280 mya First reptiles. The first mayflies and cockroaches appear. Mississippian Period 360 to 325 mya First winged insects. First tetrapods appear toward the end of the period. First amphibians appear.