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Re: Emus a Model for Dinosaurs?

----- Original Message -----
From: "Michael Skrepnick" <palaeopaint@dinosaursinart.com>
Sent: Saturday, October 28, 2006 8:06 AM

So if the point of attachment of m.caudofemoralis along the length of
femoral shaft affects either speed or power of retraction depending upon
placement, what purpose does the trochanter itself serve other than more
surface area for muscle attachment or subtle change in leverage. . .
further, as Deinonychus and Velociraptor do share similar overall
morphology, what mechanical advantage is gained by the addition of a
trochanter in the smaller form?

Not that I knew any myology... the description of the pelvis and hindlimbs of *Saturnalia* says the caudifemoralis did not insert on the 4th trochanter but medial to it, while the trochanter itself was the attachment point for something else, IIRC the gastrocnemius. Of course this would still not explain the difference between *Deinonychus* and *Velociraptor*.