Lopha species

[Ruger9a]

Good morning all.  I have what I believe to be a Lopha bivalve from the upper Jurassic period from China.  It measures 8.2 x 5.1 cm and has growth lines(?).  Can anyone provide additional information or a correction if required?

[Ruger9a]

[Ludwigia]

I'm thinking maybe Arctostrea gregaria?

[Ruger9a]

Thanks Ludwigia.  I thought Arctostrea species was from the Mesozoic and were only found in Alabama, Maryland, Mississippi and Texas.  I could be confused though.

[Ludwigia]

The ones I found are from the Oxfordian on the coast of Normandy. That is Late Jurassic as you have already stated. They are also found all over Europe and are relatively common actually.

[KingSepron]

Good find!

[Ruger9a]

Thanks guys.