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Re: Ornithomimus had feathers and "display" winglike forelimbs
But ornithomimids did not have folding arms so they were not critical for
protecting such irregular feathers. Folding arms are more selective for
protecting finely defined wing airfoils.
And it is not known whether theropods as basal as or more basal than
ornithomimids brooded their eggs.
In a message dated 10/26/12 12:09:41 AM, firstname.lastname@example.org writes:
<< The presence of long forelimb feathers might also explain the
appearance of the semilunate carpal wrist (which appears to have
evolved *after* ornithomimosaurs): It was simply to help fold the
forelimbs, and get the pennibrachia out of the way when they weren't
in active use. No need for a flight-related explanation, or a
predation-related one. >>