Origin of ceratopian sprawl

["Jordan Mallon" <j_mallon@hotmail.com>]

G'day all,

I hope I'm not beating a dead horse here, but has there been any studies 
indicating when the (possible) ceratopian forelimb sprawl may have 
originated?  I understand the Neoceratopsia's "primitive" sister group, the 
Psittacosauria, was most likely bipedal, and therefore a sprawling stance 
within the former clade must have been secondary.  But has anyone really 
looked into this?  I've been told that both _Protoceratops_ and 
_Leptoceratops_ have been reconstructed with their "elbows out and back."  
What about the recent _Archaeoceratops_?
Thanks.

-Jordan Mallon

http://www.geocities.com/paleoportfolio/


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