Another Carboniferous mystery

[Brian James Maguire]

This was found in the Carboniferous limestone of the Malahide formation , east coast Dublin Ireland,  its 40mm wide

[Tidgy's Dad]

Are there spines along the hinge line?

If not it may be an orthotetid such as Schuchertella.

[Brian James Maguire]

7 minutes ago, Tidgy's Dad said:

Are there spines along the hinge line?

If not it may be an orthotetid such as Schuchertella.

Nope no spines on the hinge line