Scanning electron micrographs of Campascus triqueter. (A) Two specimens showing shell shape in dorsal and apertural views. (B) Comparison between C. triqueter and C. minutus to illustrate differences in shell shape and structure. (C, D) Latero-apertural views of two specimens to show general shape and shell structure. (E) Dorsal view. (F) Close up view of apertural region to show short neck. (G) Close up view of aboral, pointed region. (H) Close up view of aperture. (I) Detail of shell surface to show arrangement of shell-plates.