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Re: Removing segnosaurs from Theropoda
> Sure! How 'bou;t: the Rauisuchia, the Poposauria, the Aetosauria,
> etc., etc., and on and on for the various traditionally labeled
> "thecodontian" groups? I mean, after all, the basal members of your own
> Crocodylomorpha are "thecodonts," so why don't you include them in there as
> well? If you're going to remove one of them, then you're going to have to
> remove all of them and make them separate, as listed above.
Not if you accept paraphyletic groups, as I do.
The whole point of establishing a paraphyletic taxon for the stem
group is to *avoid* the necessity of erecting numerous small, largely
similar, groups for each of the early lineages.
> If birds are
> dinosaurs, then crocs are thecodonts, but no one ever says that.
But then I *don't* include the birds in my Dinosauria! I put birds in
the seperate class Aves (not even in Reptilia).
The peace of God be with you.