Light (A-C) and scanning electron (D-I) micrographs of Euglypha filifera. (A, B) View of several specimens to illustrate variability in shape and size of the shell. (C) View of live specimen. (D) Broad lateral view to show symmetrical arrangement of shell plates and disposition of spines on the lateral margins. (E) Narrow lateral view. (F, G) Lateral view of apertural region to show shape of apertural plates. (H) View of aboral region illustrating spines and their attachment to the shell. (I) Detail of shell surface to show overlapping shell plates.