Bone marine late cretaceous

[val horn]

Found a piece of a small bone from the Severn Formation, Late Cretaceous, Maryland.

This is an area where I have found abundant turtle shell, shark teeth, enchodus, and occasional mosasaur fossils. 

Not sure if this piece can be identified.  I was thinking turtle but it seems kind of gracile at the broken end.  All help will be very welcome.

 

[Mahnmut]

Hi val horn,

I could imagine this to e turtle humerus, broken at its most gracile point?

To me the last centimeter on the thick end looks somehow different in the pics, is it the same bone, or a fragment of the next one maybe, attached by matrix?

@Tidgy's Dad?

Best Regards,

J

[Tidgy's Dad]

Could be, I suppose. 

Really not sure, sorry. 

[pachy-pleuro-whatnot-odon]

For what it's worth, doesn't look like mosasaur to me... No idea what it might be, though. Maybe a caudal rib, with most of the vertebra still attached? In which case, however, it would be mosasaur... But it seems too waisted for that 

 

@Carl?

[val horn]

Now that it has dried out some more I took several new pictures.  To me it is only one bone with

a broken shaft and probably small breaks edges of the epiphysis.  Thank you for your time and your thoughts.

 

[pachy-pleuro-whatnot-odon]

Starting to look like the rib of a caudal vertebra more and more to me... Like part of the pygal vertebra from a mosasaur.

[Carl]

On 4/24/2022 at 6:01 AM, pachy-pleuro-whatnot-odon said:

For what it's worth, doesn't look like mosasaur to me... No idea what it might be, though. Maybe a caudal rib, with most of the vertebra still attached? In which case, however, it would be mosasaur... But it seems too waisted for that 

 

@Carl?

I wish I could say. Also not getting a mosasaur vibe, but beyond that, no idea.