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Re: Lack of Running Giant Theropod Tracks

On Fri, 26 Nov 2010, tholtz@geol.umd.edu wrote:

A complication here: the Acrocanthosaurus may not have been hopping so
much as been carried along by the Paluxysaurus/whatever. So it might not
be the theropod's leg muscles alone that lifted it off the ground.

That said, there are a number of reasons to expect large theropod running
tracks to be rare:
* Such big animals may not have run or run much
* &/or they are unlikely to have run on wet, slippery surfaces that can
record a trackway
* &/or the stride length of a fast running large theropod will be so long
that you need a very large surface to record them.

So, one print by itself would be evidence of running?  ;)

* predators are usually fewer in numbers than prey, so wouldn't this
be a factor too? out of curiousity, what is the ratio of predator/prey