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Asunto: Re: An even dumber question

Mike Keesey wrote:

>More recently, _Dinosauria_ has been defined as a phylogenetic taxon, a
clade.
>One proposed definition would be: "The last common ancestor of _Iguanodon
>bernissartensis_ and _Megalosaurus bucklandii_, plus all of that ancestor's
>descendants." 

And what about the diagnosis of Dinosauria? For example, are Novas' (1996)
synapomorphies still valid or some of them has shown to diagnose more or
less inclusive clades?
Thanks,

Matías Soto