Description
Author: Jan Delsing
Text ID: 93955
Text Type: 1
Page: 0
Created: 2019-05-27 01:17:36 - User Delsing Jan
Language: EN
Text function: [[t:1173488,textblock=93955,elang=EN;Description]]
Shell small, 3.9-5.2 mm., elongately ovate-cylindrical, with a tall weakly turreted spire and a long body-whorl, slowly tapered to a short very shallowly notched anterior canal. Protoconch narrowly conical of 2-3 whorls, the last half whorl with transverse riblets. Outer lip thickened and marginated on the inner side, with a well marked broad but rather shallow sinus, occupying the shoulder slope. Aperture long and rather narrow, without denticles.
Fargo compared his genus both with Pyrgocythara and with Platycythara, stating that in the former the axials on the protoconch begin much earlier, and that in the latter the protoconch is larger, the axial riblets more delicate and the aperture wider, with a definite stromboid curvature on the lower part of the outer lip. These appear to be very fine distinctions so it is recommended that both Platycythara and Vitricythara be reduced to subgenera of Pyrgocythara. Range — Recent and Pliocene of Florida.
Powell, 1966.The Molluscan Families Speightiidae and Turridae. (Secundary description)