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Re: Pouches

a caution-remember that T rex is thought possibly to have a kenetic
biting mechanism (possibly for gulping huge bits of meat).  The jaws may
not be working under the same 'hinge-joint' as a crocodile does, but may
have torque applied (in addition) as the angles of the facial bones
change during a bite.


> Martin Barnett wrote:
> Dan Bensen wrote:
> > >>Now according to the article in last month's Scientific American,
> it
> > said that T-Rex's
> > biting strength way surpassed that of a lion or a wolf but was not
> much
> > larger than a crocodile's.  Given that T-rex had a considerably
> larger
> > mouth than most (all?) crocodiles, would it need such enormous
> > pouches?<<
> > Wait a minute, what about those tooth indentations on the leg of a
> > triceratops?  Didn't they measure the stresses it would take to do
> that
> > as being over a thousand p/in2?  That was in a Discover article, but
> I
> > don't remember when.
> The estimated biting strength for one side of a Tyrannosaurus rex'
> mouth is tentatively put here at just over13,000 newtons (2,900lbs)
> The biting strength of an alligator on the other hand is just under
> 13,000 newtons.
> I'm not saying T rex had a weak bite (on the contrary, an alligator
> has a strong one), but from looking at the muzzles of the two in
> question and considering the larger dimensions of T rex - would T rex
> need that pouch of muscle?  Perhaps our resident Tyrannosaur expert
> (or anyone for that matter) might be able to shed some light on this.
> Yours sincerely,
>                         Samuel Barnett

Flying Goat Graphics
(Society of Vertebrate Paleontology member)