> Well, you'd have to show it was present in ornithomimosaurs first.
> Garudimimus definitely lacks it, as can be seen from good photos.
be derived from a crest?
> > which I loaned several years ago from a library and never saw again.
> I'll check.  Certainly not the small ornithomimosaur section.
that Dr. Grant e. g. always correctly guesses their behavio(u)r in advance.