Parallel Evolution
Parallel Evolution is very similar to convergent evolution, yet they differ in some critical ways. This type of evolution happens when two different species start with a similar ancestor and thus develop similar traits over time. Parallel Evolution happens because the two might share a different ancestor, yet they have to develop key traits to survive a particular environment. This will, in turn, make them like each other as both have to evolve to the same place.
Due to these pressures upon them, though the two species will differ even still, they MUST adapt. For example, you’ll see this in various plants in their leaf formation. It is clear that many plants have leaf formations, but not all plants that have “leaves” are related. It’s clear that the leaf formation was done for an evolutionary purpose, otherwise, they would not remain. This is merely a form of evolution that makes one species just like another, but this still does not create a mirrored version.