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Re: dino-lizers

>> 3) Large theropods are apparently [...] NOT found w/ large bones
>> preserved in the gut, but some smaller bones are known (e.g.,
>> fishbones in Baryonyx).

>>  I would also assume: a) such items as vertebrae ... are lacking in 
>> nutritional value

Varricchio (Gut Contents from a Cretaceous Tyrannosaurid: Implications for 
Theropod Dinosaur Digestive Tracts. David J. Varricchio. Journal of 
Paleontology, Vol. 75, No. 2 (Mar., 2001), pp. 401-406) reports a 
Daspletosaurus with acid - etched caudal vertebrae and a dentary from juvenile 
hadrosaur associated. 

>> A relevant question is: have small bones been found in the gut
>> regions of Cretaceouc crocodilians? If the answer "no", then I would
>> think the presence of small bones in various theropod guts are a
>> indication (albeit counter-intuitive) of a primarily predatory
>> lifestyle/digestive system.

Are modern crocodilians definitely primarily scavengers? We've all seen the 
youtube videos where they engage in ambush predation on large animals. 
Cretaceous crocodilians were more diverse and could have included more active 

Jason Brougham
Senior Principal Preparator
American Museum of Natural History
(212) 496 3544