Light (A, B) and scanning electron (C-I) micrographs of Centropyxis laevigata. (A-C) View of many specimens to illustrate variability in shape and size of the shell. (D) Apertural view to show general shape and shell structure. (E) Dorsal view. (F) Lateral view. (G) Close up view of aperture showing its circular shape and smooth surface around the aperture. (H) Detail of smooth apertural surface. (I) Detail of dorsal side of the shell to illustrate its rough surface, covered with sand grains.