Possible Captorhinus Fossil?

[selenite star]

I found this 152mm x 101mm x 25mm piece of what appears to be a limestone fossil. Other minerals found nearby were chert and loads of limestone. Found in Wyoming on Medicine Mountain on the side of the road where there is plenty of rock fall every year.  Scales/scutes range from 6.35mm in oval length to 19.05mm, all scales/scutes are about 6.35mm in width and apart from each other.

 

The closest scale/scute pattern I have seen on the internet is the Captorhinus lizard, very well preserved in a cave. Anyone have any ideas?  I appreciate you all!

[Carl]

Sorry, these don't appear to be scales. And Captorhinus (not a lizard) had much finer skin detail that would never produce scales this big: those you've seen are extremely tiny. 

 

Do you know how old this is? That could help the ID process. I don't recognize it, but it could be fossil shells or some kind of trace fossil.

[Fossildude19]

@jpc

[selenite star]

@Carl. Thank you for your response,

 

So from the geological map I've found, it's from the paleozoic.  Two options from where I found it could be from Permian Phosphoria Formation and related rock or just
Permian, Pennsylvanian, and Mississippian 
From Tensleep Sandstone and Amsden Formations in north eastern Wyoming.  Appreciate your feedback!

[Carl]

1 hour ago, selenite star said:

@Carl. Thank you for your response,

 

So from the geological map I've found, it's from the paleozoic.  Two options from where I found it could be from Permian Phosphoria Formation and related rock or just
Permian, Pennsylvanian, and Mississippian 
From Tensleep Sandstone and Amsden Formations in north eastern Wyoming.  Appreciate your feedback!

Thanks! It's truly a bizarre specimen and isn't jogging any memories. I'm still thinking shells or trace fossils, but it could also be purely geological. Very weird.

[jpc]

I can honestly say... no idea.  It looks more geological, but certainly not Captorhinid scales, as stated above.