Description
Author: Jan Delsing
Text ID: 82875
Text Type: 1
Page: 0
Created: 2016-04-03 17:05:02 - User Delsing Jan
Language: EN
Text function: [[t:1188088,textblock=82875,elang=EN;Description]]
Shell pale brown, straight-sided, conical, with sixteen compact whorls. Nucleus, beginning glassy, smooth, and saccular, in the second whorl becomes strongly transversely ribbed and swollen; the next whorl is a little smaller than the second, and takes on the normal characters of the shell; sculpture consisting of two principal nodulated spirals with a smaller undulated thread between them, and a still smaller waved thread in front of and marking the suture; the transverse sculpture consists of concave waves (20-23) under the spirals, which cross the whorls but are not conspicuous; base smooth or radiately striate, somewhat concave, bounded by a small double keel of two threads which are covered up in the suture; canal strong, short, wide, twisted; aperture squarish, small; sides of the shell flattened, the sutures not conspicuous. Max. length of shell, 9.75 mm; of last whorl, 2.5 mm; max. lat. of shell, 2.25 mm.
Source: Dall, 1889. Reports on the results of dredgings, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1879-80), by the U. S. Coast Survey Steamer 'Blake'. (Original description)
Interchangeable taxa
Author: Jan Delsing
Text ID: 82877
Text Type: 19
Page: 0
Created: 2016-04-03 17:06:52 - User Delsing Jan
Last change: 2016-04-03 17:08:06 - User Delsing Jan
Language: EN
Text function: [[t:1188088,textblock=82877,elang=EN;Interchangeable taxa]]
This shell was found mixed with Varicopeza crystallina from which it was easily picked out, owing to its straighter sides, brown color, less rounded base, and turbanlike nucleus.