Permian Age Fossil?

[Rikache]

Hi there everyone!

 

Ive got a tricky one today. I came across this listing for a “Trimerorhachis fossil” and I was wondering If y’all would be able to help me properly identify the specimen and possibly identify from what part of the body it comes from.

 

The seller specifies that it was found in the Ryan Formation near Waurika, Oklahoma and claims that the bones belong to a member of the family Trimerorhachidae. 
 

Permian fossils are personally some of my favorites, but I’m not completely able to distinguish what this fossil could be. My only guess is that it could be part of the frontal/nostril area of the skull seeing as there’s a cavity at the front and that the eye sockets of the skull point upwards and not forward, but I’m not entirely sure. 

 

I’d greatly appreciate any guesses as to what exactly this specimen may be!