I'm going to explain myself another way. Imagine this scenario of millions of years in the supposed genetic tree of the species... we are going to isolate a single line from that tree, the one that goes from the ancestor of the cockroach to the ancestor of the butterfly. (Clearly, those ancestors are hypothetical, because no evolutionist has ever seen them, so they have to make them up.)
These two supposed ancestors are relatives, the butterfly's is later than the cockroach's, so one appears after the other, as if it were a descendant of that one. But in the middle of that path there should exist an intermediate ancestor, which would be a being half almost-cockroach and half almost-butterfly... a chimera. Have you ever seen a cockroach-butterfly?
Nor will you ever see a shark-crocodile, nor a crocodile-turtle , nor a hippopotamus-whale ... because those chimeras never existed, although the evolutionary myth preaches that they did exist.