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RE: Triceratops vsTyrannosaurus ??

> > Date: Sat, 12 Dec 2009 12:49:25 -0500
> > From: GSP1954@aol.com
> > To: dinosaur@usc.edu
> > Subject: Re: Triceratops vsTyrannosaurus ??

> > To the best of my knowledge unprovoked attacks by
> herbivores upon equally
> > large predators are very rare, so in statistical terms
> the healed bitten off
> > Triceratops horn is strong evidence that Triceratops
> and Tyrannosaurus did
> > engage in combat as the result of the latter trying to
> have the former for
> > lunch. Also, the uniguely extreme adaptations of T rex
> for killing elephant
> > sized horned dinosaurs indicates that the super
> predator was highly adapted
> > for preying on super ceratopsids (that's why no other
> giant theropod was a
> > well armed as T rex, because they lived in habitats
> without huge ceratopsids).
> >
> > GSPaul

--- On Sat, 12/12/09, Jaime Headden <qi_leong@hotmail.com> wrote:

> Pardon me, but didn't *Giganotosaurus* supposedly take on
> super-elephant-sized sauropod dinosaurs? It lacks the
> cranial crushing equipment, but looks more like a repurposed
> *Allosaurus* and was maximized (seemingly) to cranial +
> manual prey-engagement.
> Cheers,
> Jaime A. Headden

The best defense when your neck is 10m long and really skinny is to be tall 
enough to keep it out of the reach of carnivores equipped w/ jaws large enough 
to engulf it. Prey tonnage follows tallness as a matter of structural 
necessity, but would not necessarily affect predator equipment per se, that 
being determined by the dimensions of the supremely vulnerable neck.

The theropod's perspective on the question of "trikes or sauropods for lunch?" 
can be easily appreciated; just stick a finger between your back teeth and bite 
down. Really easy to crunch that skinny thing, isn't it? Now try to bite your 
fist, preferably while wearing spiked brass knuckles...

One can speculate that the trike in question was defending young, and that the 
hypothetical young was the primary target, but it is still not surprising that 
T rex was built more strongly than theropods assumed to have hunted sauropods, 
even very large species.