The species are moderate-sized. The orbicular shell is turbinately depressed. The
whorls are convex, smooth or transversely striated, the last one rounded at the periphery. They have a mottled or streaked color-pattern. The
umbilicus is partly closed by a callus deposit. The
columellarlip ends anteriorly in an obtuse dilated callus. The callus emitted at the columellar-parietal angle of the
aperture is tongue-shaped, closing the umbilicus except a rather narrow chink, or even entirely, in some species.[4]
Distribution
This marine genus occurs in the Central and East Indian Ocean, off
East Africa, off Indo-Malaysia, and off
Australia.
Wilson, B., 1993. Australian Marine Shells. Prosobranch Gastropods. Odyssey Publishing, Kallaroo, WA
Higo, S., Callomon, P. & Goto, Y. (1999) Catalogue and Bibliography of the Marine Shell-Bearing Mollusca of Japan. Elle Scientific Publications, Yao, Japan, 749 pp.
Williams S.T., Karube S. & Ozawa T. (2008) Molecular systematics of Vetigastropoda: Trochidae, Turbinidae and Trochoidea redefined. Zoologica Scripta 37: 483–506.