If redwoods are a byword for great stature, grasshoppers represent the opposite. And what insect could be more common or familiar?
UCEs are conserved structures that are not functionally constrained. Yet there is not so much as a hint of a problem for evolutionary theory.
A former teacher of mine was the late Adolf Seilacher, who was a leading authority on trace fossils and who for obvious reasons preferred to be called “Dolf.”
Fossils often leave much room for very different interpretations of relatively poor evidence.
In the quite checkered history of the detailed reconstruction of Kimberella, we can distinguish four distinct successive phases.