Light (A, C) and scanning electron (B, D-I) micrographs of Netzelia tuberculata. (A, B) View of many specimens to illustrate variability in shape and size of the shell. (C) View of live specimen to show protruding pseudopods from the aperture. (D) Lateral view. (E) Apertural view showing general shape, as well as multilobed aperture. (F) Close up view of aperture to illustrate a narrow collar of small pieces of quartz and lobed aperture. (G) Close up view of a narrow collar of small pieces of quartz. (H) Detail of aboral side of the shell to illustrate regular arrangement of small protrubences. (I) Close up view of organic cement.