Description
Author: Jan Delsing
Text ID: 99115
Text Type: 1
Page: 0
Created: 2020-02-21 22:52:53 - User Delsing Jan
Language: EN
Text function: [[t:545010,textblock=99115,elang=EN;Description]]
Shell regularly elongate-conic, dark brown, with the top of the tubercles paler; nuclear whorls broken with only a portion of the last whorl remaining which is smooth except for a sharp central keel; postnuclear whorls 11, sculptured with 3 spiral cords and almost equally strong axial ribs, of which 16 appear on the first whorl, increasing to 24 on the penultimate whorl; the intersection of the spiral cords and axial ribs forming large, raised tubercles and the spaces enclosed by them deep, square pits; on the spiral cords the posterior is at the summit of the whor]s and the anterior a little above the suture with the median about half way between them; the tubercles of the posterior spiral row rounded, rather faint on the first 2 or 3 whorls but slightly the largest on the later whorls, the tubercles of the median and anterior row somewhat truncated on the posterior face; periphery with a spiral cord only a little less strong than those on the spire and rendered somewhat nodulous by the extensions of the axial ribs; base short, rounded, with 2 spiral cords of which the upper is nearer to the peripheral cord than to the lower, entire surface of spire and base with microscopic striations; aperture subquadrate, outer lip thin, scalloped by the spiral cords, anterior channel strong, columella short, not reflected. The type measures: length, 6.2 mm.; diameter, 2.0 mm.
Hertlein, L.G. & Strong, A.M., 1951; Mollusks from the W. Coast of Mexico & Central America. Part 10
Interchangeable taxa
Author: Jan Delsing
Text ID: 99116
Text Type: 19
Page: 0
Created: 2020-02-21 22:53:42 - User Delsing Jan
Language: EN
Text function: [[t:545010,textblock=99116,elang=EN;Interchangeable taxa]]
The base of the shell of this species is sculptured with 2 unequal cords in comparison to 3 equal cords on Ceiithiopsis cosmia Bartsch.
Hertlein, L.G. & Strong, A.M., 1951; Mollusks from the W. Coast of Mexico & Central America. Part 10