The outer lip is crenulated and sometimes denticulated throughout its whole length. The outer lip is indistinctly crenulated. The forewing outer margin is slightly crenulated. Marginal tooth crowns labiolingually flattened and covered with faintly faceted and finely crenulated enamel. The Alpine Schist of New Zealand is characterised by heavily crenulated and sheared phyllite. Its cheek teeth had broad shearing crests and crenulated enamel. These ribs render the summit of the whorls decidedly crenulated. The basal margin is convex, crenulated, thickened interiorly. The edges of the calcite grains are deeply crenulated (irregularly and minutely notched and scalloped). It had a crenulated parapet and round towers at the two corners of the frontage. The leaves are , opposite, sessile, linear or lanceolate, and slightly crenulated. The yellowish margins are crenulated or bordered by a series of dimples. It presents a marginal ornamentation of crenulated (slightly notched) margins composed of dark scales. The re-entrant was one of many along a crenulated coastline. There are four lips on the mouth that are either simple or slightly crenulated.