Light (A, C) and scanning electron (B, D-I) micrographs of Padaungiella lageniformis. (A, B) View of many specimens to illustrate variability in shape and size of the shell. (C) View of live specimen showing granular cytoplasm fulfilled with many food vacuoles and large nucleus. (D, E) Broad lateral view of two individuals showing general shape and arrangement of shell-plates. (F) Narrow lateral view. (F) Apertural view. (H) Broad lateral view of apertural region showing a thin collar of organic cement. (I) Detail of shell surface showing shape and arrangement of shell-plates.