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In a message dated 11/1/99 4:29:12 PM EST, eamalitz@hotmail.com writes:

<< If its an Oviraprotorosaur then this seems 
 to punish the bird-> flightless theropod model. I >>

Actually, it supports the bird->flightless theropod model. The oviraptorosaur 
(if that is what it belongs to!) pygostyle is best explained as a feature 
acquired as a flight adaptation that was retained in the ground-dwelling 
descendant form.