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Return of Holes in Frills



Interesting episode of PALEOWORLD this evening, in light of recent
discussions of the function and evolution of ceratopsian frills. Some very
amusing footage of Peter Dodson acting out -Triceratops- intimidation in
front of a boxing ring. 

I am becoming increasingly convinced that ceratopsian frills and horns
developed primarily in response to intraspecific, rather that interspecific,
combat.

Can anyone tell me if the model shown during the end credits was
-Pachyrhinosaurus-?

Caitlin R. Kiernan