Description
Author: Jan Delsing
Text ID: 133513
Text Type: 1
Page: 0
Created: 2025-07-08 12:11:40 - User Delsing Jan
Language: EN
Text function: [[t:1989039,textblock=133513,elang=EN;Description]]
TYPE: Holotype, British Museum (Natural History), London, No. 1902.5.28.47. TYPE LOCALITY: "Cape Natal, W. by N., distant 11 miles," South Africa. RANGE: From Cape Natal north to the continental shelf off Zululand, eastern South Africa. HABITAT: Trawled in 160 to 200 fathoms on a dead shell and pebble substrate. Empty shells are sometimes foundcemented to the shells of living species of the gastropod Xenophora G. Fischer, 1807. DIMENSIONS: Adult specimens are 25 to 30 mm in length. SHELL DESCRIPTION: Shell is small and pyriform. It is solid, with a short, pointed spire. Protoconch is small, of about two and one-half smooth, rounded whorls. Corrosion prevents an accurate whorl count. Teleoconch has about three and one-half slightly convex whorls sculptured with strong axial ribs connected by weak transverse lirae. These lirae become stronger on the anterior portion of the last adult whorl as the axial ribs gradually disappear. The deeply canalled suture is coronated where the axial ribs extend upward as nodules. Aperture is long, narrow, and crescent shaped, about three-fourths the total length of the shell. Columella is almost straight, with about four weak, oblique plaits between which appear two or three weaker folds. The anterior plait is strongest. Outer lip is exceedingly thick, forming a broad, smooth, raised exterior border. Shell is a unicolored, pale yellowish-white. ANIMAL AND RADULA: The radula is triserial with a central row of small tricuspid teeth; laterals are small and oblong. REMARKS: Five of the six specimens of this rare species, sent to us by Mrs. Helen Boswell for examination, were attached to the shells of a carrier shell of the genus Xenophora. Most specimens give the appearance of having been dead a long time.
Weaver C.S. & DuPont J.E. (1970). Living Volutes. A monograph of the Recent Volutidae of the World.