It’s fascinating how God created in modular patterns, in a manner that is constantly resistant to evolutionary interpretation. Here we have at first glance a correspondence between birds and dinosaurs in the manner in which air is transported throughout body tissues. But instead of being found in a small dinosaur in strata appropriate to being considered as a precursor to birds, it ends up being found on a huge 30’ long dinosaur that no one would consider a progenitor of the avian race! The trunk of the presumed evolutionary tree is missing, as always.
Common ancestor to both.
This is testable. Watch for future discoveries of older fossils of small critters that even you could consider a progenitor of both the avian race and this big guy.
Praise God!