caption: The image shows a small shell of a megalacron lombei, commonly known as a sappuina lumbei, on a black surface next to a piece of paper with text written on it. The shell is a light brown color with a white underside and a spiral pattern of ridges and grooves. It has a glossy sheen and is resting on a flat surface. The paper has a white background with black text written in a cursive font.