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Re: Feduccia (was: polarity of bipedality in dinosaurs)
Ron Orenstein summarizes Feduccia's argument:
> 1. the similarities between birds and maniraptorian theropods are convergent
> 2. animals like Velociraptor are too big, heavy and earthbound to be bird
> 3. anyway, they lived too late
> 4. birds evolved from arboreal ancestors, and Velociraptor isn't the least
> bit arboreal.
What about Greg Paul's idea that dromeosaurs and birds are
both descended from Archaeopteryx?