Form und Bewegung und die Entstehung von Neuerungen in der Evolution
Three different phases are recognisable in the evolution of inner and outer organs of Synapsids and their ancestors – evolution itself evolves. In the first phase, from the Late Precambrian to the Devonian, before vertebrates took their first steps on land, the physical formation of the organs was dominant in evolution. In this phase, the development of organs is the integral innovation with which are connected innovations at the functional and behavioural level. In the second phase, from the Devonian to the Upper Cretaceous, the integral innovations are new functions such as endothermy and the capacity for sustained activity. They develop in connection with functional separations in the organs. In this phase, new organs and bones usually no longer arise. The integral innovations in the third phase are new living styles and new behaviour. During that phase, modifications of the organs take place. The integral innovations derive from the unity of the whole body, and are focused in new organs or structures through which the capacities and the autonomy of the organism are increased. They shift inwards, from the physical to the functional level and ultimately to the level of behaviour. Due to this inward shift, animals themselves are more and more involved in their own evolution.