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Re: feathers, fibers, endothermy...
At 11:41 AM 1/20/98 -0800, Gigi Babcock or Ralph Miller III wrote:
> Further correlational support for
>the hypothesis of early ectothermic avians was provided by
>Chinsamy's bone histology studies that revealed, for example, that
>_Patagopteryx_ and other early bird fossils exhibit LAGs (lines of
The difficulty with using this as evidence for or against ectothermy is
that LAG's are also known in some hibernating mammals, such as bats. So,
as far as I can see, all LAG's show is seasonal cessation of growth.
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