Here is a Devonian clam and brachiopod fused together. They were found in the Jeffersonville Limestone in Clark County, Indiana. It looks to be that the clam and the brachiopod did not interact together. Looking at just the brachiopod side we see a Cornulites attached to one of the shell ridges and at the hinge point of the shell a hole. It is possible that a snail bore into the brachiopod shell.
Signs of beekite are on both sides of the brachiopod shell.