Unknown bivalve from the Middle Lias Marlstone UK

[DE&i]

The wonderfully looking Tetrarhynchia tetraedra brachiopods from the Middle Lias, Marlstone UK.

 

 

Would anyone have a suggestion please as to what the bivalve looking shell is?

 

[westcoast]

Could be a brachiopod. Can you expose more of the hinge area around the apex?

[DE&i]

I'll certainly give it a go @westcoast although the matrix is very hard, it would perhaps need a little dremmel work in my prepping shed.

[TqB]

I'm sure it's a terebratulid. Lobothyris punctata is the one you get in large numbers in the Marlstone Rock in some places and that looks a good (but not definite) bet.

[Ludwigia]

+1 for terabratulid brachiopod, although I couldn't say which one.

[DE&i]

Thank you all for looking I'll check through my British Mesozoic Fossils handbook to see if I can find a match.

[Taogan]

Another vote for a small terabratulid, but I can't work out which, there are so many