[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Yonghesuchus, was Shuvosaurus



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.