The process is completed until there are only two animals left, and they are split. One such derived character is the presence of legs.
Fossil evidence shows that vertebrate legs are newly evolved with respect to fish.
Fish came first, the vertebrate legs. You have now created a simple cladogram. One branch is for fish, the other for monkeys. By the by, taxonomy is the process of naming organisms, and is neither accurate nor inaccurate. Phyletics is the science of determining the beasts genetic relationships, and that can be inaccurate if one is not careful.