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Re: Supracoracoideus ...
Point well taken. You're quite right of course, and I was aware that
there was a small supracoracoideus present, but apparently insufficiently
massive to substantially enhance the beat frequency or substantially
improve the locus of motion during the recovery stroke. I should have
said "because of the lack of a LARGE, EFFECTIVE supra.....". The drift of
my statement remains unchanged, and I don't find your comment at all
nit-picky. There's certainly nothing to forgive, nor any offense taken.
Matthew Bonnan wrote:
> A small bone (acutally muscle) of contention.
> James Cunnigham said:"Archie couldn't achieve that beat frequency
> from a standing start because of the
> lack of a supracoracoideus ..."
> This is really nit-picky (so forgive me) but technically all
> archosaurs and lepidosaurs have a supracoracoideus muscle. I think
> what you mean to say is that Archie has a poorly-developed or
> non-bird-like supracoracoideus. The supracoracoideus in alligators
> originates on the coracoid and inserts onto the deltopectoral crest of
> the humerus, and aids in shoulder flexion and drawing the arm forward,
> and it was likely present in some form in all known dinosaurs.
> Matt Bonnan