Nashua Formation-Pleistocene Bivalve ID

[eksten20]

Hi there! I’m working on a project and I’m having trouble ID-ing this specimen. I wanted to ask if anyone can identify this bivalve? It is from the Nashua Formation in northern Florida.

This specimen is slightly larger than 5mm x 5mm

 

Any assistance, even a family or sub family is appreciated!

 

[Fossildude19]

This looks like a "beak" or umbo of a bivalve, possibly an oyster, ... but not sure you can get any further with ID from just this piece.

 

@MikeR  @Coco

 

Cropped and contrasted:

 

 

[Coco]

To me it looks like the "heel" of a bivalve like an oyster, with layered shells.

 

Coco