I understand how cladistics are claimed. It has problems inherent to it. If there are ancestors to any clades they cannot be recognized. What would they be? They came from something else, for the clade to be. So no division can be shown according to its identified ancestor, no phylum can be shown according to its identified ancestor, no class can be shown according to its identified ancestor, no order can be shown according to its identified ancestor, no family can be shown according to its identified ancestor, and no genus can be shown according to its identified ancestor, that are each distinct from ancestral predecessors, which there must be for all of them with evolution of all life from common ancestors being the case.