Green River Formation - Claw? Tooth?

[tgroch]

This was found in Lyman, Wyoming, USA (Green River Formation) during excavation for construction.

I'm new to this, and thought it was a tooth, but google images only shows grooves like these on claws.

The fossil is 55~60mm long; BG grid is a 5mm grid. Any help would be appreciated.

Thad

[Fossildude19]

Sorry, but this looks like a broken concretion, to me.

Regards,

[mikeymig]

Yup! What Tim said.

Mikey

[jpc]

I agree with the others... not enough bone or tooth texture on either the surface or the broken end.