Middle Devonian shell

[GordonC]

This from the Mount Marion Formation in south eastern NY.

Most other finds are ID and will be posted in the trips section.

Thanks,

Gordon

[caldigger]

Cool piece Gordon.

[Fossildude19]

Gordon,

I'll have a look through my references when I get home this evening. 

It may be difficult to ID, as it appears to be an internal cast.  

 

Very nice bivalve though. 

I don't think I've come across any like it. 

Regards,

 

 

[Ridgehiker]

Look up a brachiopod called 'Rensselaeria'. If not that,  then it is likely a similar genus of Terrebratulid

 

 It's usually a rare find even in formations its known from.

 

[Fossildude19]

Gordon,

Can we see a few other views of this?

It looks like it terminates at more of a point than Rensselaeria. 

I'm wondering if it isn't a partially covered Goniophora sp

.

 

Something like this, perhaps? 

 

[GordonC]

Thanks Tim, here are more pics, the one with half a penny is of the underside.

I see the specimen as more like a terebratulid.

Gordon

[Shamalama]

If you show us a picture of the back side (or underside) of the specimen I think we will find it is a partially crushed bivalve on it's side. The symmetry looks similar to, and is about the same size as, a the genera Nucula or possibly Nuculites or Nuculoidea.

[GordonC]

Thanks, the underside

[Shamalama]

Thanks for posting the picture Gordon. I'm going to stand by my earlier hypothesis.   If you look at the third picture down, and three pictures that follow, you will see a partially crushed Grammysioidea arcuata that I believe mimics what you see in your piece. However, you have a different species:  http://viewsofthemahantango.blogspot.com/2015/02/modiomorpha-and-grammysioidea.html

 

And here is a post with a Nucula bellistriata which I think resembles your specimen if it was not crushed: http://viewsofthemahantango.blogspot.com/2015/01/nucula-bellistriata-pelecypod-from.html