Opis similis is a pelecypod found in the middle Jurassic (Bajocian stage) aged rocks at Segnethal, Germany. I purchased it fossils from Matthias Weissmueller's E-bay store.
Right hand valve
Left hand valve
Matthias does all his own prep work and really brings out the character of the shells that he finds. I like the overall shape of the shell and that is one of the reasons I purchased it.