[tempguy9999]

Well maybe. There were a class of very birdlike creatures called enantiornithines which I suspect are a completely different line and quite possibly not dinosaurs, however I've dug around before and am unable to find any precise statement of their genetic relationship to extant birds (and therefore their relationship to true dinosaurs).

Enantiornithines had the wing joint inverted: https://en.wikipedia.org/wiki/Enantiornithes

"Enantiornitheans are thought to have left no living descendants ... the articulation of the shoulder bones – which has a concave-convex socket joint that is the reverse of that of modern birds"

If anyone can elucidate, please do.

At the bottom of the article is a link to another article on these creatures https://www.bbc.co.uk/news/science-environment-36651471 "Ancient birds' wings preserved in amber"