Yixianornis does have an 'ornithurine'-style pygostyle (SVP 2002?), so your
Ornithurae2 should be put a node further down the tree.
Oh.
Ornithuromorpha is defined to include Patagopteryx AND Vorona, so should be a node further down.
Hmm. If Vorona ends up being a basal enantiornithine (as suggested by some of Clarke's trees when Liaoningornis is included), this could be problematic.
Thanks for using the phylogeny on my website, but it's not based on the
results of my analysis (well, the latter certainly influences it, but there
are a lot of things in my tree which PAUP hasn't found from my matrix yet-
monophyletic Enantiornithes and Yanornithidae, etc.).