Description
Author: Jan Delsing
Text ID: 88684
Text Type: 1
Page: 0
Created: 2018-07-24 01:10:31 - User Delsing Jan
Language: EN
Text function: [[t:1192891,textblock=88684,elang=EN;Description]]
Diagnosis. Apex pointed, posterior located, turned posteriorly. Height 32% of length. Sculptured by ca. 20 strong radial cords, with interspaces regularly filled by commarginal sculpture as transverse scales.
Description. Shell size ca.2.5 mm; low. limpet-like; height ca.32% of length. White, opaque. Protoconch of 1.5 rounded whorls; somewhat protruding, located laterally, situated on right in posterior edge of apex; smooth, glossy; ca. 4% of total shell size. Slit anterior, rectangular, width 16% of length; 7% of shell width, 27% of shell length; edges rather irregular. Profile highly curved ventrally, sagittal profile in arc with imaginary center located ca. 50% of shell length ventral to highest shell region. Sculpture of strong radial cords, ca. 20 surrounding apex; gradually increasing in strength towards aperture; interspaces half of cords' width, filled by comarginal sculpture as transverse scales; interval between comarginal sculpture ca. 1/2 of thread's width, ca. 20 scales along median threads. Selenizone median, marked by narrow, elevated edges (elevation equivalent to that of cords); filled by somewhat regularly distributed lunules. Aperture slightly concave, outline elliptical, width ca.60% of length; edges undulating due to radial cords. Inner surface smooth, simple, glossy.
Measurements (in mm). Holotype: 2.5 by 0.8;
Simone, L. R. L.; Cunha, C. M. (2014). Taxonomical study on the mollusks collected in Marion-Dufresne (MD55) and other expeditions to SE Brazil: the Fissurellidae (Mollusca, Vetigastropoda).