Pelecypod 2Your model is disabled. For more details go to Edit properties3D Model
This pelecypod (bivalve mollusc) displays the diagnostic bilateral symmetry parallel to the hingeline, which distinguishes the group from brachiopods, which have bilateral symmetry perpendicular to the hingeline. As such, pelecypods have valves (shells) that are identical in size, and the shapes are mirror images of each other. Unlike brachiopods whose larger pedicle valves are attached or buried in the seafloor substrate in a prostrate orientation, pelecypods sat ‘upright’ with the heavy hingline anchoring them. The specimen is either original shell or a cast with sediment filling the interior.
I am not sure taxonomic details of the specimen or its age - if anyone recognises it I can add these details.