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  A couple of weeks ago someone (I think it was Tom Holtz) recommended 
a paper by Jose Bonaparte on Riojasaurus. While studying the basal 
sauropoda I got sidetracked into the prosaurpods, so it caught my eye. 
The paper does have an excellent figure of the skull, although the text 
is a little hard to follow, being in spanish.  What characters 
designate this skull as primitive when compared to Plateosaurus?  
Also, is there any prosauropod material known from the southwestern 

               Virginia Tidwell