Gaining ground tells the rich and complex story of their emergence and evolution beginning with their closest relatives the lobefin fishes such as lungfishes and coelacanths jennifer a clack defines the characteristics of tetrapods describing their anatomy and explaining how they are related to other vertebrates. Acanthostega gunneri of fish like and tetrapod features acanthostega has engendered a variety of speculation about the paleoecology and evolution of early tetrapods its feet may have been superior to fins in negotiating shallow waters filled with aquatic plants and woody debris gaining ground the origin and early evolution of . The origin and evolution of tetrapods jennifer a clack series life of the past distribution world with detailed anatomical descriptions of early tetrapods and their ancestors a discussion of the environments these creatures inhabited a chronicle of important fossil sites and discoveries and an expert summary of the tetrapod family . These first tetrapods are the ancestors of all ver over the next 70 million years this tentative beachhead became a worldwide colonization by an ever increasing variety of four limbed life these first tetrapods are the ancestors of all vertebrate life on land
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