What shell is this? (Found at Lulworth)

[KingSepron]

Found this at Lulworth Cove which is a Late Jurassic to Mid Cretaceous area.

[Ludwigia]

Could be a rhynchonelloid brachiopod.

[TqB]

I think it's a pectenid bivalve in Cretaceous greensand (at 3", rather too large for a rhynchonellid).

[Ludwigia]

53 minutes ago, TqB said:

I think it's a pectenid bivalve in Cretaceous greensand (at 3", rather too large for a rhynchonellid).

Oops! I must be blind. Didn't even notice the ruler. I'm sure you are correct, Tarquin.