American Philosophical Society, 1978. — 211 p.Today and for much of the past 200 million years, A amphibians have been small, inconspicuous
forms. Although numerous in terms of species, frogs, salamanders, and apodans occupy a narrow range of habitats—tied by their anatomy and physiology to shallow fresh water or damp terrestrial environments. In the absence of competition and predation from other terrestrial vertebrates, amphibians from the late Devonian into the late Carboniferous were much more widely diversified.
