Possible theropod bone

[PrehistoricWonders]

Hi everyone, 

this is a dinosaur bone I’ve been prepping, it was found on the lance fm in WY, it seems hollow and I was wondering if you could tell me if it’s a T-rex bone or a different theropod species,

8 1/4 by 3 1/2

TIA.

[PrehistoricWonders]

@Troodon@hadrosauridae@jpc

[LordTrilobite]

I'd say it looks more like the spongy bone was damaged rather than a bone that was originally hollow. I'd lean away from theropod.

[PrehistoricWonders]

Ok, thanks! It definitely is marrowy on the inside, but I wasn’t sure if theropods had the spongy inside or not.

[PrehistoricWonders]

What type of bone do you think this is? I’d guess part of a femur or tibia, but I’m curious what everyone else thinks!!

[hadrosauridae]

Its always hard to tell when looking at a picture online of a tumbled chunk of bone.  Anytime a bone like this is broken open, it can result in the marrow material eroding out very quickly.  However, I will say that I see a density in the piece you have that leads me to think it has possibility for theropod.  There is a difference in the appearance between theropod and others (plant eaters) coming out of the lance / hell creek.  Theropod typically is very dense and can be shiny in appearance if they arent too heavily abraded either pre or post deposition.  Its harder to explain than to see.

[Fossildude19]

Chunkosaurus whoknowsikus.   

Random bone chunks are nearly impossible to identify with any accuracy. .

[Troodon]

It does not look like theropod.   Most likely a herbivore bone with the center marrow eroded away.  Hollow bones have a smoother inside.   Not enough there to determine what it is.

[PrehistoricWonders]

Here’s a picture of of the bone after I’ve scrubbed it with a tooth brush for the last 45 minutes.

[jpc]

If I had this I would not call it anything more detailed than dinosaur.  

[PrehistoricWonders]

1 hour ago, jpc said:

If I had this I would not call it anything more detailed than dinosaur.  

Thank you, that was what I was leaning towards because both sides had valid points and I’m not an expert!!