Calliostoma punctulatum

The height of the shell varies between 15 mm and 50 mm. The solid, conoidal shell is imperforate. It is yellowish or light fawn-colored, unicolored or dotted on the spirals with dark brown. The granules are often white by rubbing of the cuticle. The surface of the shell is covered with narrow spiral closely and conspicuously beaded ridges, numbering 8-12 on the penultimate whorl, sometimes equal in size, sometimes alternately larger and smaller. On the next earlier (antepenultimate) whorl there are about 7, and still earlier whorls have 3 beaded carinae. The interstices are obliquely striate. The spire is a little concave in outline toward the apex. The minute apex is acute. The sutures impressed. There are about 8 or 9, convex whorls. The body whorl is rounded at the periphery. The oblique aperture is rhomboidal, pearly within, and showing folds in the nacre corresponding with the lirae outside. The pearly columella is arcuate and not tubercled below.[2]

This marine species is endemic to New Zealand found on rocks and at intertidal depths.

• Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
• Marshall, 1995. A revision of the recent Calliostoma species of New Zealand (Mollusca:Gastropoda:Trochoidea). The Nautilus 108(4):83-127
• "Calliostoma (Maurea) punctulatum punctulatum". Gastropods.com. Retrieved 15 January 2019.