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Re: hadrosaurid speed again (was: Maastrichtian extinction)
On Friday, November 15, 2002, at 10:34 PM, Tim Donovan wrote:
[...] and faster speed- conferred by longer legs- to catch it. IMHO,
it isn't at all surprising that taxa which seem least able to resist
attack or flee-the nearly hornless centrosaurines and relatively short
legged, bulky lambeosaurs, respectively-were eclipsed by
Tyrannosaurus. It reprsented a major leap in predatory capability, and
not all of the contemporaries of Albertosaurus could adapt.
I think Rob Gay's post on hadrosaurid limb proportions falsified your
hypothesis that lambeosaurines were slower than hadrosaurines. You have
cited no references and given no data to support your (often repeated)
opinion; and you never answered Rob's post.
Similarly, you have not provided any data to support the conclusion
that longer legged animals are faster, and when presented with evidence
to the contrary:
you simply ignore it.
So please, supply us with _actual data_, not just restatements of
opinion, it's getting tiresome. In particular I would like to see data
that supports the conclusion that longer legs = faster in medium to
large sized animals, and that the small differences observed in
hadrosaurine/lambeosaurine leg length would have a significant effect