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Raindrops on Roses and Dewlaps on Dinosaurs



Hey,
I've been doing some reading on possible dewlaps (skin flaps) on dinosaurs.  
Does anyone know of any technical refs which discuss signs of dewlaps on bones, 
or the presence of dewlaps in dinosaurs?

And, dewlaps (as seen on some cattle, noticeably the Brahman cow) are used as 
sexual display functions.  Would there have been any other possible uses in 
dinosaurs?

Steve
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Steve Brusatte-DINO LAND PALEONTOLOGY
SITE: http://www.geocities.com/stegob
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