3D Rotation of Internal Mold of Gastropod
Sample and Caption Provided by Don Goldstein at the University of Tennessee. The specimen is the internal mold of a turretellid gastropod, shaped like a corkscrew. The trace rests on and in between the mold of the internal anatomy, because it once lived inside the shell as an endolith. The specimen is 26 mm long, 17 mm wide at its base and 8 mm wide at the apex. The traces are 1mm wide at their widest point. Some detail shows such as the "spreiten" in the broken area on the bottom of the photo. It represents the boring of a worm in the steinkern itself, probably before it lithified.