出版社：Consejo Superior de Investigaciones Científicas
摘要：The punctuated equilibrium theory is analysed as well as the causes of why at the present time it has become a middle-range theory although it was originally presented as a wide range evolution theory. The facts responsible for this transformation are studied. The article concludes with a vision of what is to be expected in the near future.
关键词：punctuated equilibrium;modern synthesis;middle-range theories;fossil record;equilibrio puntuado;síntesis moderna;teorías de rango medio;registro fósil
