Callistele calliston

Callistele calliston, common name the beautiful top shell, is a species of sea snail, a marine gastropod mollusk in the family Trochidae (unassigned to a subfamily).

The suture is linear, immediately beneath the prominent peripheral cord which gradates the spire.

These are much more distant than the accremental striae, provided at somewhat irregular intervals with 16 rounded invalid tubercles.

The base of the shell is very flatly rounded with 7 concentric narrow lirae, the inner 4 closer than the rest, which are separated by 4 to 6 interlirate striae.

The callus at the base partly borders the umbilicus and is attached to the columella along a vertical groove.

The base is of a lighter tint, the outer 6 cinguli of a rose pink, minutely dotted with creamy white.

The central rachidian is heart-shaped, narrow free end surmounted by small, slightly serrated denticle.