The Roadian (also known as Ufimian) is the first stage of the Guadalupian epoch of Permian period. It spans the time between 270.6 ± 0.8 Ma and 268 ± 0.7 Ma (million years ago). During this period the low diversity caseid fauna that characterized the Kungurian age is supplanted (and for the most part replaced) by a rich range of early therapsids. It is not unlikely that these early therapsids may have had the beginnings of metabolic development towards the mammalian condition. In any case, these animals quickly radiated into an extraordinary variety of large and small terrestrial herbivores and carnivores. The Early Permian ectothermic families died out early during, or perhaps prior to, this time.