It just seems to me, there is another feature to evolution we are missing. Something hidden in epigenetics. Switches that can be flipped with the right stimulus. Something that would force rapid speciation. The gradual small genetic errors, mistake by mistake small changes, at birth that are somehow heritable, just does not seem plausible to me. It would mean that in nearly every litter of mice born, there should be birth defects that continue on in the lineage. How many generations of lab mice have been born in the centuries since we have been studying mice and all we can show is OBOB mice or mice with weird colors and such--and these traits need to be coddled.
I still say that if you put mice in a place where they could live and breed happily, 210 million years later, all you'd have is mice. Some may look funnier than others, but there would be no elephants.