Description
Author: Jan Delsing
Text ID: 109977
Text Type: 1
Page: 0
Created: 2021-06-24 14:07:15 - User Delsing Jan
Language: EN
Text function: [[t:571429,textblock=109977,elang=EN;Description]]
Shell solid and highly glossy. 4-5 slightly convex whorls, not well defined, secondary spire callus slightly fills the suture. Simple, rounded and glossy protoconch of about 1.5 whorls. Shell weakly shouldered, a very low elevated ridge just below the suture is present in many specimens. Columella strongly concave, parietal callus separated from the body wall, forming a deep and long false umbilicus, which is about as wide as in E. balteata but definitely narrower than in E. lienardi. Labral denticle present but not very well developed. Anterior fasciolar groove deep and curved, fasciolar band smooth. Posterior fasciolar groove relatively shallow. Ancillid band well developed, comparatively flat and narrow. The ancillid groove forms a clearly visible impression down the centre of the ancillid band. Operculum chitinous, completely closing aperture. Colour orange-yellow, aperture flesh-coloured. Large specimens can reach a length of about 65 mm. Distribution - Venezuela, where it is common, and Aruba, where it is rather rare, according to De Jong & Coomans (1988: 89).
Discussion - Both this species and E. balteata seem to be inhabitants of shallower water than E. lienardi. E. glabrata can easily be confused with E. balteata, especially at Aruba where both species occur. E. glabrata is generally more slender, does not have a very well developed shoulder ridge, has a narrower ancillid band and is generally much more brightly coloured. It differs from E. lienardi by its much more slender shell, its generally less brighter coloured shell, its wider ancillid band an much narrower false umbilicus.
Voskuil, R.P.A., 1991. The recent species of the genus Eburna Lamarck, 1801 (Gastropoda Olividae Ancillinae)