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Re: Antorbital fenestra
On Friday, November 26, 2004, at 01:39 PM, Andrew A. Farke wrote:
The antorbital fenestra houses an air sac in all archosaurs. See
for *the* paper on the antorbital fenestra. Muscles have little, if
anything, to do with the fenestra.
That seemed to be the most logical purpose for me too, I assume for
communication, as well as display, if not more for display. Since the
antorbital fenestra in many theropods is the largest opening in the
skull, I figure that simply being a muscle attachment does not warrant
the implied danger of giving another theropod such a vulnerable and
large area to [mortally] wound. On the other hand, housing an air sac
to be used for visual communication that would bulge out of this
opening makes more sense. Especially considering that most, if not all,
theropod skulls are adorned with crests, horns, and ridges of different
shapes and sizes that in most cases wouldn't make good weapons -
although they make fantastic inter-specific display devices.
Funny thing is reading about the mating displays of kori bustards is
what made me ask this question.
oops - actually, that was my answer. Whenever I think of anorbital
fenestra, I automatically think of the big, modified ones possessed
by theropods; I did not even consider its function in other
Speaking of modified, has anyone noticed a correlation to the size
and/or shape of the A/F in theropods in relation to headdress(crests,
etc.). Also, how has the A/F in theropods changed from pre-theropod
Hehe, I love questions.