Amniote Phylogeny presented as a "Tree of Life"

The tree is rooted in the ancestral Amniota. Successive branches correspond to groups that have diverged as successively later times. Cross-sections of limbs are characterized by particular characters that define all successive twigs on that branch. Compare this tree with a conventional phylogenetic diagram of the same group.

HOMEWORK: Are there any errors of fact in this Tree? Redraw the Tree to correct any errors.