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Re: Feduccia (was: polarity of bipedality in dinosaurs)
From: Jeffrey Martz <martz@holly.ColoState.EDU>
> 1. Are integument feathers NECCESSARY for endothermic thermoregulation?
No, at least not in animals larger than some critical size.
> 2. How many Archaeopteryx/early bird specimens are known to possess
All Achaeopteryx specimens have feathers, but virtually none of the other
early bird specimens do.
> 3. How many theropods are known to have skin impressions?
> How many have
> definite scales, and how many show features which are very odd, and
> possibly suggestive of feathers?
The *only* one that has anything that is not clearly "scaly" is the
The peace of God be with you.