Light (A, C) and scanning electron (B, D-I) micrographs of Lesquereusia epistomium. (A, B) View of many specimens to illustrate variability in shape and size of the shell. (C) View of live specimen to illustrate granular cytoplasm and long pseudopodia. (D) Broad lateral view to show general shape. (E) Narrow lateral view to illustrate clear distinction between body and neck. (F) Lateral view of apertural region. (G) Detail of shell surface showing shape and arrangement of siliceous curved rods. (H, I) Close up view of network of organic cement and porous structure of meshes.