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Re: Eustreptospondylus Q's

Betty wrote:

<The gait that Jaime mentions involving a series of leaps interupting
a fast run is called pronging (or bounding). Could a quadrapedal
dinosaur do this pronging?  Or would the weight be too much on
landing, what with acceleration added to the regular mass of the

  Depends on the animal. The longest legged quadruped I can think of
is *Thecodontosaurus*, and while the bones of the forearm are slender,
I don't beleive they are as strait as required for the process. And I
think the hand was wrongly constructed, but I may be wrong. However,
there are a few other small animals with more slender hands that may
be more compatible. Greg Paul did an excellent short study on the
bounding possibilties of *Marasuchus* most easily demonstrated by the
slender forearms and very long hind legs, as in rabbits, frogs, and
*Thecodontosaurus* (and *Scleromochlus*) (Paul, 1988). The
biomechanics may differ on the results, but mass is not entirely
restrictive of the process, as *Thecodontosaurus* was probably only a
little larger than a big hare.
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