The Diversity of Early Tetrapods

The first vertebrates to develop limbs began a transformation toward terrestrial life that profoundly changed the course of evolution and ecosystems on land. It was a time of evolutionary opportunity and of experimentation in several directions, as animals adapted to meet the requirements of life in shallow stream systems and eventually on land. This chapter begins with the first limbed animals and then explores the great diversity of early tetrapods that flourished during the latter half of the Paleozoic Era.

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