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In a message dated 8/22/01 7:55:49 AM EST, mike@tecc.co.uk writes:

<< George,
 You speak as though Ornithodira is dead and buried.  Is that so?  I
 thought that the pterosaurs-are-derived-prolacertiformes idea was
 still just one hypothesis? >>

I think Dave Peters's paper will be a difficult act to follow. Ornithodira 
still exists, if you want to include a whole lot of animals in it that 
weren't there before.