Light (A, C) and scanning electron (B, D-I) micrographs of Euglypha tuberculata. (A-C) View of many specimens to illustrate variability in shape and size of the shell. (D, E) Broad lateral view of two specimens to show symmetrical arrangement of shell plates. (F) Lateral view of apertural region to show shape of apertural plates. (G) Apertural view. (H) View of apertural plates. (I) Detail of shell surface to show overlapping shell plates.