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Re: Coracoid/scapula (was Re: flying Archie)
I'm not sure what you mean here. What "convergence" are you referring to?
Between the shoulders of *Rahonavis* + *Shenzhouraptor* and those of derived
How about this scenario.... the immobile scapulacoracoid is primitive, but
enantiornithines and euornithines evolved peg-and-socket articulations
independently (athough with opposite configurations); and the flat joint
an intermediate step between the immobile joint and the peg-and-socket
That's what I mean. The "long-tailed birds" evolved it a third time.