As cooler and drier conditions prevail many amphibian species become extinct. Frogs, toads, salamanders and newts survive. The first reptiles appeared in the Pennsylvanian and were small lizard like creatures. As the land dried reptiles, with the ability to move away from the water, were able to exploit new environments. By Permian reptiles were becoming the dominant life form on Earth.
Climate becomes more severe because ocean currents blocked.
Oceans overall became deeper and shallow shelf habitats shrink leading to extinction of many marine invertebrates.