That would definitely be good for skeletons, but it doesn't solve the problem. Is is just this specimen that lacks ribs or is it the whole species? Do tend ribs

That would definitely be good for skeletons, but it doesn't solve the problem. Is is just this specimen that lacks ribs or is it the whole species? Do tend ribs vary much between species within the genus? It's a hard problem to solve, and people can get distrustful when they hear "facts" have been superceded, that the theory they read in a museum is no longer popular.