Blackwell Publishing
Precambrian Paleozoic Mesozoic Cainozoic
Cambrian 590 MYRBP Ordovician 438 MYRBP Silurian 438 MYRBP Devonian 408 MYRBP Carboniferous 360 MYRBP Permian 286 MYRBP

By the end of the Carboniferous, the first reptiles had appeared. Similar to modern reptiles, the first reptiles were characterised by dry, scaly skins and, in some cases, a herbivorous diet.

But the most significant step in the evolution of reptiles from amphibians was the advent of shelled eggs laid on land. No longer constrained to live near water, they could exploit the drier, inland areas.

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