Sixth and last period of the Paleozoic Era 299–252 million years ago

<span class="mw-page-title-main">Permian</span>

Permian

The Permian  The Permian witnessed the diversification of the two groups of amniotes, the synapsids and the sauropsids . The world at the time was dominated by the supercontinent Pangaea, which had formed due to the collision of Euramerica and Gondwana during the Carboniferous. Pangaea was surrounded by the superocean Panthalassa. The Carboniferous rainforest collapse left behind vast regions of desert within the continental interior. Amniotes, which could better cope with these drier conditions, rose to dominance in place of their amphibian ancestors. Various authors recognise at least three, 