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Re: Bipedalism Revisited

On Sun, 10 Nov 1996, Jonathan R. Wagner wrote:

>         On a topic which has lately been quite popular, can anyone out there
> answer any of the following:
> 1) Do sprawling reptiles run quadrapedally (ie. with suspended phase)?
> 2) When sprawling reptiles do locomote rapidly in a quadrapedal stance, is 
> there
>         a point at which they stiffen their spines to limit lateral flexion?

        Dimetrodon had some stiffening of the spine.
        nick L.