I was in the badlands of nebraska in May and found a half turtle, dug it out and brought it home. However I did not pack it well enough to survive Fed Ex it was bounced hard enough to crack the internal mud into multiple pieces. I am now trying my ability on a 3d turtle puzzle. I multiple pieces yet to place, but I have one piece that I have not idea where it belongs. It is a little different. After I removed the turtle from its resting place in nebraska, I looked around the extraction site and the immediate area for anything I missed. this piece is from that final harvest. IIs it a piece of skull or just an odd looking piece of the edge of the shell, or something else again. All help is appreciated