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On Fri, 7 Nov 1997 Dinogeorge@aol.com wrote:
> Maybe similar structures in ornithischians, e.g., stegosaurs, are homologous.
> This would be more likely if (as I believe to be the case) ornithischians and
> sauropodomorphs shared a more recent common ancestor than either group did
> with theropods.
I've been toying with this idea too. Perhaps the MRCA would be something