njcreekhunter Posted August 26, 2017 Share Posted August 26, 2017 I purchased this bone fragment at a fossil show. It's from the Morrison formation of Utah. I suspect it's theropod, most likely Allosaurus because of its hollow nature but I just wanted to get other opinions on it. Thanks everyone! Link to comment Share on other sites More sharing options...
Rockwood Posted August 26, 2017 Share Posted August 26, 2017 Put me down as a non expert skeptic. Looks dense to me. Link to comment Share on other sites More sharing options...
The Speeding Carno Posted August 26, 2017 Share Posted August 26, 2017 I'm not seeing a hollow bone, however it is a rather unique bone fragment. Possibly a skull fragment? It's a bit of a chunkosaurus Link to comment Share on other sites More sharing options...
RJB Posted August 26, 2017 Share Posted August 26, 2017 Looks like a partial piece of bone that was 'hollow' where the marrow was? Im no dino expert by any means. Ive got one piece that shows where minerals filled in the marrow space. RB Link to comment Share on other sites More sharing options...
jpc Posted August 27, 2017 Share Posted August 27, 2017 I would say theropod is a good guess, but i imagine you can not tell which genus. There are at least three genera of large theropods found in the Morrison. Link to comment Share on other sites More sharing options...
Rockwood Posted August 27, 2017 Share Posted August 27, 2017 Concept ? It seems likely that public (my at least) perception has been skewed by the increased chance of having been exposed to cancelous bone from a tyrannosaur as an example. Link to comment Share on other sites More sharing options...
njcreekhunter Posted August 29, 2017 Author Share Posted August 29, 2017 Thanks for the replies everyone! I was thinking maybe a fragment of a limb bone that would've been hollow in the middle. The bone that's there is dense though. So it's pretty safe to label this as theropod for my collection? 1 Link to comment Share on other sites More sharing options...
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