Yes you are correct, they were already present which means that I used a bad example, my mistake. But nothing changes, since I can use only Cambrian animals to demonstrate that science contradicts the theory of evolution with regard to the creation powers of the evolution process.
These are not issues with the OP. These are issues with your beliefs about the enormous creation powers of the evolution process. The OP simply demonstrates what creation powers the evolution process should have had to account for the enormous novelty over a relatively short geologic time span(early Cambrian). Then it demonstrates that scientifically, the creation powers of the evolution process are zero. And the reason for the powerlessness of this process is simple. Namely, the evolution process boils down to what all natural processes boil down to: CHANGE. Or more specifically: interactions of forces and particles. These interactions happen constantly in both living and nonliving systems, but they don't produce new functional things. They don't produce new systems with logically connected, interrelated and interdependent parts, such as cars or organs. And the reason for that is also simple: the number of interactions outcomes that are biologically (mechanically) non-functional versus those that are functional is so huge that even if the interactions continue until the heat death of the universe (in 10^100 years) no new and distinct biologically (mechanically) functional outcome will emerge. So, that is the reason why the scientific method of experimentation and observation shows the complete powerlessness of natural processes (including evolution) to create new functional things. Your car, for example, is nothing but some specific arrangement of particles. And although nature is capable to rearrange particles and generate specific arrangement of particles no rational person would claim that nature can create a car. That is why we, rational people, claim that, although natural process of evolution is capable to rearrange particles and generate specific arrangement of particles (CHANGE) it cannot produce heart, kidney or wing. Experimental science repeatedly demonstrated that we are right.