Is this a Ceratopsian Epoccipital?

[jikohr]

Hi everyone!

 

This piece of what I believe to be Ceratopsian frill stood out to me. It has a vascular "lump" on it and I'm wondering if it might be a type of Epoccipital. The piece measures about 62 mm long, 36 mm wide, and 37 mm thick and was found in the Hell Creek Formation of Powder River County, Montana.

 

Any insight is appreciated as always!

[jpc]

I don't see anything I would call an epioccipital, but it is a weird shape.  

 

[jikohr]

3 hours ago, jpc said:

I don't see anything I would call an epioccipital, but it is a weird shape.  

 

The bone texture is throwing me off trying to ID it as well. The interior is all spongy bone with only a thin wall of compressed bone (correct me if I'm using the wrong terminology).

 

Normally when I think of boney dino lumps in Hell Creek I'm thinking Ankylosaur, Ceratopsian, or Pachy but do any of those three even have nodes like that? I thought their nodes were all much more solid.