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