Description
Author: Jan Delsing
Text ID: 88839
Text Type: 1
Page: 0
Created: 2018-08-02 11:32:44 - User Delsing Jan
Language: EN
Text function: [[t:576230,textblock=88839,elang=EN;Description]]
Shell fusiform, of moderate size, with canal of medium length. Whorls turreted, shouldered high up, shoulder concave, whorls below shoulder roundly convex. Body whorl tapering to a moderately long canal. Suture slightly impressed. Protoconch worn but apparently of two rather bulbous whorls. Sculpture of broad regular axial folds, some 11 on the body whorl. 10 on the penultimate. These axials arise just above the shoulder angle and extend to the lower suture on the spire whorls. On the body whorl the axials disappear across the base. Spiral sculpture rather variable. The holotype on the penultimate whorl has four primary spiral cords below the shoulder crossing the axial folds and rendered wavy by them, with a single secondary spiral between the upper three primary cords, and two spirals about the same strength as these interstitials on the shoulder. Body whorl with four spirals with interstitial secondaries, three threads on the shoulder, and about 17 strong spirals across the base and canal. One paratype from Station 41 has three primary spirals on the spire whorls and the penultimate with secondary interstitial threads and a single cord on the shoulder. There are three strong cords on the body whorl with interstitials, two fine cords on the shoulder, and 14 strong spirals on the base and canal. Aperture elongated into a half-closed canal. Outer lip thin, crenulated by exterior spirals. Inner lip smooth, clearly limited. Columella slightly concave, twisted slightly at junction with canal. A low spirally coiled fold commences from this junction, hardly visible from the outside but clearly visible in broken shells. Canal slightly bent to left. Height, 21,7 mm.; height of aperture, 11,0 mm.; diameter, 7,5 mm.
Dell, R.K., 1956. The Archibenthal Mollusca of New Zealand.