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Re: Ornithischian Lungs???

As I point out in Dinosaurs of the Air, ornithopods probably paralleled 
mammals in developing a diaphragm driven lung system because they share a 
lumbar region (while lacking all the avian attributes found in saurischians). 
As for other ornithischians there is nothing living with similar trunk 
complexes and it is difficult to tell what was going on, Perry may well be 

G Paul