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Re: late night thoughts: misunderstand what?
don ohmes wrote:
> "HOWEVER - sauropods are unlikely to have
> coorperated by standing nice and still to allow for such a well-aimed bite.
> I'm not sure how stealthy a multi-tonne tyrannosaur could have been, but I'm
> guessing most saurpods would have known about them long before the predator
> was within striking range..." -- D Pigdon
> Aha! So you think *T. rex* (damn, I'm getting to like those little stars;
> wonder what they are for) capacity for stealth was an issue in relation to
> sauropods, but not w/ hadrosaurs? What, Are Hadrosaurs stupid, or blind, or
> something? You dissing hadros?
An adult hadrosaur and an adult sauropod are two very different kettles of
fish. I'm guessing *most* hadro's were roughly of similar mass (or at least
less than twice the mass) of a really big tyrannosaur. Whereas a really big
sauropod (assuming rexes went
for adults) would have been a much heftier target. As a general rule; the more
mass, the bigger the whallop.
We *know* that tyrannosaurs target hadro's (healed bite marks on the tail). We
also know that hadro's lacked anything that looks obviously like a means of
aggressive defense (not even a thumb spike to speak of). Those forelimbs were
puny, the hindlimbs were
probably too busy trying to skedaddle, the tail was far less mobile than that
of a sauropod (all those stiffened tendons) and using their (relatively blunt)
beaks would have meant putting their heads within chomping distance a rex's
Also - hadro's could run. That means that a startled hadro could eventually run
out of puff, or trip and fall in a panic. Either way they'd have presented a
relatively easy meal. Sauropods couldn't run to save themselves (literally), so
I'm guessing they used
more of a 'stand and fight' tactic. Did rexes give chase to hadro's? Maybe.
What sort of evidence might back up such a claim? Something like healed bite
marks around the tail region perhaps... :)
How many pre-mortem bite marks have even been found on a large adult sauropod
GIS / Archaeologist http://www.geocities.com/dannsdinosaurs
Melbourne, Australia http://heretichides.soffiles.com