The top-down pattern of appearance of animal phyla during the Cambrian explosion represents major conflicting evidence for Darwinian evolution.
The paradigm of cladistic classification based on assumed common ancestry should be reconsidered in favor of a traditional phenetic classification based on maximum similarity.
Obviously, evolutionary “laws” are quite malleable and have to give way when they become too cumbersome.
Darwin himself realized that any kind of significant saltational change would imply a miracle-like intelligent intervention.
In evolutionary biology, the great transitions from one habitat to a totally different way of life have long proved to be the stuff of good storytelling.