tropical Euramerica. This study found a Late Pennsylvanian extinction pulse that reflects drying climates and the transition of lycopod to tree fern-dominated land floras.

Vertebrates

Before the collapse, vertebrate animal species distribution was very cosmopolitan, with the same species existing across tropical Pangaea. After the collapse, each surviving rainforest 'island' developed its own unique mix of species. Many amphibian species became extinct, while the ancestors of reptiles and mammals

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