wishing for a furcula

[val horn]

I collect in the Severn, a late cretaceous marine formation in Maryland regularly.  Found an odd bone.  I think it is a furcula but am uncertain and open to other interpretations.  If it is a furcula can it be identified further,  is it bird, is it dino can a guess be made as to species?  It is appr 2-3  cm on a side with a significant narrow fossa along the entire internal margin of the bone.  All suggestions will be valued.

[jpc]

could it be turtle jaw?

 

[val horn]

there is certainly a lot of turtle in the area

[digit]

The shape, curvature, and raised midpoint tip all resemble the many (Miocene to modern age) turtle mandibles I've seen at the FLMNH. Your item is older (and rougher) than the ones I've come into contact with but I think you may see some resemblance looking through some online images:

 

https://www.google.com/search?q=turtle+jaw+fossil&tbm=isch

 

 

Cheers.

 

-Ken