Re: Yonghesuchus, was Shuvosaurus

[David Marjanovic <david.marjanovic@gmx.at>]

I wrote:

> > The Proterochampsidae lies outside of whatever is left of the
> > Archosauriformes. You'll find they nest in a continuum from Youngina -
> > Choristodera - Proterochampsidae - Doswellia  - Parasuchia.
>
> That's a very strange assemblage. Are you sure you've included all 
> proposed
> apomorphies of Archosauriformes as characters in your analysis?

Perhaps -- perhaps -- worse yet: if you don't find Lepidosauromorpha and 
Archosauromorpha as sistergroups to the exclusion of *Youngina*, then you 
need to postulate that the "diapsid" middle ear evolved twice.