The shell has a pyramidal shape. Its base is flat, without false-umbilicus. The rhomboidal
aperture is very oblique, angular, and wider than long. The outer
lip is lirate within. The
columella is very short, vertical, with a strong spiral fold, ending anteriorly in a knob or point.[3]
Vaught, K.C. (1989). A classification of the living Mollusca. American Malacologists: Melbourne, FL (USA).
ISBN0-915826-22-4. XII, 195 pp
Williams S.T., Karube S. & Ozawa T. (2008) Molecular systematics of Vetigastropoda: Trochidae, Turbinidae and Trochoidea redefined. Zoologica Scripta 37: 483–506
The shell has a pyramidal shape. Its base is flat, without false-umbilicus. The rhomboidal
aperture is very oblique, angular, and wider than long. The outer
lip is lirate within. The
columella is very short, vertical, with a strong spiral fold, ending anteriorly in a knob or point.[3]
Vaught, K.C. (1989). A classification of the living Mollusca. American Malacologists: Melbourne, FL (USA).
ISBN0-915826-22-4. XII, 195 pp
Williams S.T., Karube S. & Ozawa T. (2008) Molecular systematics of Vetigastropoda: Trochidae, Turbinidae and Trochoidea redefined. Zoologica Scripta 37: 483–506