Help With Hell Creek Theropod Bone

[RCFossils]

I’ve been going through some material that I collected this Summer in the Hell Creek of Southeastern Montana.

I have this little theropod bone (measures approximately 14 centimeters).

It is missing one end and has a little damage to the other.

The bone is covered in a layer of siderite.

I know that it is not much to go off of but am hoping someone might have an idea what it is.

I can provide additional pictures if needed.

 

 

 

[RCFossils]

[Troodon]

Did not even realize it was a bone until I looked at the broken end.   I cannot see anything diagnostic to say what it belongs to.   Why do you think its Theropod?

[RCFossils]

Mainly going off of the shape and that it is very thin walled.

I had considered croc but it does not match up well to other material that I have.

[Troodon]

The broken end does not look hollow and thin walled.  Reptlian is a possibility.

[RCFossils]

If it reptile, do you think this is likely a femur?

[Troodon]

Here is a Tibia and Femur of a Cretaceous Croc you can compare against.

 

 

[RCFossils]

Thanks for the pictures.

I can definitely see some similarities.

I will post more pictures once I get it cleaned.