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Re: Important feathered dinosaurs

-----Original Message-----
From: Ronald Orenstein <ornstn@home.com>
To: dinosaur@usc.edu <dinosaur@usc.edu>
Date: Tuesday, December 07, 1999 4:38 PM
Subject: Re: Important feathered dinosaurs

>>Personally,...I like Protoavis in that it indicates the presence of a true
>>avian form  as early as the Triassic. (feathers assumed from the "quill
>>nodes" found in the wing structure).

>Except that it doesn't according to most authorities, and there are no
>"quill nodes" (just a ridge that might possibly have provided attachment
>for something, maybe).

OK.  Perhaps the nodes are questionable. What about the triosseal canal?
...the large keeled sternum??
It seems that the majority don`t see it as being avian, but then,...what is
it? I haven`t heard any alternate proposals put forward as to what it could
possibly be?