A note on my last post about the evolution of stem-feathers; as I did said in the post I was not present in SVP so all my information about the presentations there were outstretched from people present at the event, so that post might have suffered from a misunderstanding of my part or a misquotation of my sources. And that actually happened.
In the section about Lovelace et al. paper I affirmed he did said that Coelophysis would need some form of insulation to survive in Chinle, and it would die from hypothermia if not. That was a misunderstanding of my part based on a misquotation I read, Lovelace never said it would need insulation to survive, it would benefit from being insulated nothing else.
What that means for my discussion and final point?
The part where I did argue that if Coelophysis would need insulation to survive much smaller animals like basal ornithodirans would need it as well; independent if living in more topical region*; lacks support now. We are back to the "steam-feathers might or not be a basal trait of Ornithodira" point; we lack evidence to solidly support or deny if filamentous structures would be present in the basalmost members of that clade. (*That is wrong as well; topic for another post).
What we know is that pseudosuchians and avemetatarsalians both had high-metabolisms and were probably "warm-blooded"; hence the LCA of Archosauria would likely be as well.
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