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Re: Emus a Model for Dinosaurs?
In all fairness, "quite different" is relative. Neornithes limb
mechanics are very similar to dinosaurs in their articular contacts
(even accounting for fusion of the metapodia and the tibiotarsus).
Limb excursion (as Tim and Jim and Jim noted) is generated somewhat
differently (shifting from the primitive acetabulum based locomotion to
the more derived knee-based limb excursion), but the maximum and
minimum ranges of motion are very similar, including off-axis motion
(which is important). And the actual plantar surface of the feet (and
the internal bones, tendons, and ligaments that create it) of modern
cursorial dinosaurs are almost identical in how they function to their
Mesozoic brethren. Certainly much better than using most extant
placental feet to understand the biomechanics of Mesozoic mammal
Wyoming Dinosaur Center
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Sent: Fri, 27 Oct 2006 8:41 AM
Subject: Re: Emus a Model for Dinosaurs?
Andreas Johansson wrote:
Aren't neornithine leg mechanics quite different from those of
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