Indentify Fossil from Wyoming

[MachoCyclone]

I need help to indentify a fossil found at Fossil Butte, Wy. I found it about 20 years ago while on vacation with family. The guide was telling us how to open the rocks and being a typical teenager, I just randomly grabbed a rock and broke it open. The guide couldn't indentify it and my grandmother does still have the other side of the fossil. My wife and kids think it's cool, but with led love to know more about it. 

[Fossildude19]

Welcome to the Forum. 

It looks to be a fish from the Green River Formation. 

Possibly a Diplomystus dentatus. 

Neat fish. 
Thanks for posting it, and welcome again. 

Regards,

 

[MachoCyclone]

9 minutes ago, Fossildude19 said:

Welcome to the Forum. 

It looks to be a fish from the Green River Formation. 

Possibly a Diplomystus dentatus. 

Neat fish. 
Thanks for posting it, and welcome again. 

Regards,

 

Thanks for the quick response. Now I know what to research.

[FossilDudeCO]

It is a Diplomystus dentatus.

hopefully you didn't take this from the park

[Runner64]

Agreed, Diplomystus fossil fish from the Green River formation. The deposits there are from the Eocene and that puts it at roughly 50 million years old. It's in nice condition as well and you can't beat the story the fossil holds in your family!

[Jdeutsch]

This atlas is nice for  Green River fossil fish- might help your research

 

http://www.fossilmuseum.net/Fossil_Galleries/GreenRiverFish.htm