Re: Dinosaurs and birds

[David Marjanovic <david.marjanovic@gmx.at>]

> Scott, would you elaborate a bit on the two quoted points, please?  I note 
> in passing that pterosaurs don't have "a pulley-like supracoracoideus 
> needed to prevent dislocation of the humerus during downstrokes".

And what do bats do...? Do they have any homo- or analogue of the 
supracoracoideus? (For the upstroke they use the good old deltoid, the 
muscle we use for the same movement.)