Hi,
I am still new at identifying brachiopods, I know there is a great diversity of similar species, which makes it even more difficult for me.
Can you help me identify these two brachiopods, they both feature a semicircular outline, concavo-convex profile, and small size (~1.0 cm wide). They also have a wide, straight hinge numerous and very fine lines and ribs.
Not sure if they are the same species, one of them has a larger size with a bit smaller width compared to length. So I don't think they are the same species.
The plate was found in the Nicolet River Formation south of Montreal, QC
Any help would be appreciated, thanks !