Home > Invertebrates > Shells > Volutoidea > Cystiscus sandwicensis

Created 3/8/2026

Family Cystiscidae

INDO-WEST PACIFIC / HAWAII

Cystiscus sandwicensis



Kaupo, Oahu, 3 feet, 2mm


Beach drift, Hapuna, Hawaii, 1mm

  

HAWAIIAN MARGINELLID

Common under rocks or rubble in shallow water.  Ovate, opaque white, with visible whorls, a broad parietal callus, aperture 2/3 of overall height, columella with 2 to 4 diagonal folds, and outer lip folded inward with small denticles.  Attains 0.1 inch, 2mm.  Mascarenes to Japan, Hawaii, and French Polynesia.  Formerly known as Granula sandwicensis.