Re: Scapular movement in Dinos

["Jim Kirkland Ph.D" <dis@gj.net>]

NANNOTYRAN@aol.com wrote:
> 
>   Is there any decent argument against scapular rotation in quadrepedal
> dinosaurs?  GSP illustrates his dinosaur skeletons showing a fore-and -aft
> motion of the scapula, presumably to give the animal extra push in it's back
> stride.My research on Ankylosaurs does not support it in that group, but I do 
not have a problem in other groups.

In Ankylosaurs (when not crushed) The scap corocoid is strongly arched. 
Fitting it over the barrel-shaped rib cage, it can be seen to be very 
limited in how much it could rotate. Given the short legs and heavy 
armor in ankylosaurs, I doubt seriously that they moved very fast ever.

Jim K.

I still love em. Bless their ugly hearts.