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more on pseudosuchians...
My impression based on what I have read so far suggests to me that
the main tactics employed by paleontologists advocating the pseudosuchian
origin of birds are based more on attacks on theropod-Archaeopteryx
similarities rather then actually presenting bird-like pseudosuchian
characteristics that do not also happen to be archosaur apomorphies. All
I know is that Tarsitano & Hecht's only piece of evidence for a
bird-pseudosuchian connection was a superficial resemblance between the
coracoids of _Archaeopteryx_ and _Euparkeria_.
By the way, doesn't Herrerasaurus have _EXTREMELY_ atrophied digits
IV and V? Doesn't this give weight to the idea that Herrerasaurus is not
only _not_ a basal dinosaur (though potentially a basal theropod) but that
theropod digits really are I, II, III, rather then II, III, IV?