scapula question

[Tim Williams <twilliams_alpha@hotmail.com>]

David Peters wrote:

> On various lizard skeletons you see what appears to be a "second story" 
> addition to the scapula. Now is this a less-ossified portion of the 
> original scapula? Or is it a novel extension of the the original scapula? 
> And finally, do we see it anywhere else but among the squamates?

A suprascapula has been reported for the hypsilophodont-grade ornithopod 
_Parksosaurus_.  This element is ossified and separate from the scapula.

According to Jain and Bandyopadhay (1997), _Antarctosaurus septentrionalis_ 
also has a suprascapula.  In this case, this element is said to be 
coossified with the scapula, and gives the impression that the scapula is 
longer than it actually is.


Tim