Gaining ground: the origin and evolution of tetrapods

Introduction: The Origin of Tetrapods

Skulls and Skeletons in Transition

Relationships and Relatives : The Lobe-Fin Family

Setting the Scene : The Devonian World

The First Feet : Tetrapods of the Famennian

From Fins to Feet : Transformation and Transition

Emerging into the Carboniferous : The First Phase

East Kirkton and the Roots of the Modern Family Tree

The Late Carboniferous : Expanding Horizons

Gaining Ground : The Evolution of Terrestriality.