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Re: FYI -- Microraptor gui, Burnham and Alexander, PNAS...
Twelfth post and beyond, required reading for any one going to
comment on the "impossible" leg-sprawling flight posture of the
That's a case of "wait for the paper that won't even be begun anytime soon".
Importantly, however, those posts explicitly don't argue for the
180°-sprawled pose that Burnham et al. wanted to squeeze *M.* into. I
was there at their talk at the SVP meeting of 2008, and they had a
reconstruction where the femoral head pointed not into the acetabulum
but ventrally (vertically downwards), and the trochanteric crest touched
the ilium, leaving _no_ space for the very muscles that would have
pulled the legs up into this pose! That was cringeworthy.