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Re: late night thoughts: misunderstand what?

----- Original Message -----
From: "Sam Barnett" <sam.horus@gmail.com>
Sent: Thursday, June 14, 2007 5:33 PM

"Their teeth and their skull biomechanics. Tyrannosaurs look more like
they took time to place a bite in a convenient position and then
thoroughly crunched their prey..."

What is your interpretation of the apparently healed bite marks in the
tail of Edmontosaurus and the illium of Triceratops - don't these
suggest that Tyrannosaurus could grapple something and run?

Sure: first a chase, then a bite, and then (if necessary) holding with the arms to position the next bite. The healed bite marks show that the third step failed to occur because the prey ran too fast or otherwise got out of reach.

Allosaurid arms are less stocky, more mobile, and longer than tyrannosaurid arms, and keep the 3rd finger; in sum, they are not as extremely adapted for power. Allosaurid leg proportions are consistently less cursorial than those of tyrannosaurids of the same size.