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Re: Pterosaur feathers?
George Olshevsky (Dinogeorge@aol.com) wrote:
<Not scales. Nobody's found >scales< on dinosaurs yet. Scales are only on
Oh, please. Scales are well-described, for they weren't naked skinned.
As in crocodilians and some lacertilians (e.g., helodermatids, including
fossils ones), non-overlapping, tubercular scales are known from
impressions and partial carbonized remains in various taxa. "Dave", NGMC
91 has a scalation pattern on the pes that matches birds, and distinct
gene work shows that bird-foot scales turn to feathers without much
manipulation, and there are breeds with feathers here instead (ptarmigan,
various gallinaceous fowl). Just a matter of playing with the
The keratins are essentially the same and produce only distinct internal
proteins. But you would be vary, very hard-pressed to identify an
impression genetically and at this point, the above statement from George
is simply unfounded, and essentially wrong in that crocodilians have
Jaime A. Headden
Little steps are often the hardest to take. We are too used to making leaps
in the face of adversity, that a simple skip is so hard to do. We should all
learn to walk soft, walk small, see the world around us rather than zoom by it.
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