This phenomenon could rightfully be called a Tertiary Butterfly Explosion analogous to the Cambrian Explosion of animal phyla.
So, is every thing OK with Darwinism after all? No so fast. Actually, there are some problems that do not square well with a Darwinian scenario.
Should we draw any conclusions from such consistent empirical failures of a theory?
Elephant shrews are sometimes considered to be living fossils, and their origin is believed to go back 57.5 million years in the Paleocene.
Primates not only appeared suddenly, but their different subgroups of lemurs, tarsier, and simians all appeared at about the same time.