Is the creation of a new species macro or microevolution?
Is this where you place the barrier, or do you place it higher than the species level? Exactly how much change do you think life is limited to.
Can a species of Ant evolve into another species of Ant?
Can a Wolf evolve into a Dog?
Can a Horse evolve into a Zebra?
Where do you think the trend of genetic diversity is blocked?
Rather than assuming that macro evolution occurs where is there evidence of one animal evolving into another?