Description
Author: Jan Delsing
Text ID: 108444
Text Type: 1
Page: 0
Created: 2021-05-01 11:37:50 - User Delsing Jan
Language: EN
Text function: [[t:575799,textblock=108444,elang=EN;Description]]
Shell small, whitish, vitrinellid-like, broadly umbilicate and depressed. The protoconch consists of about 0.6 whorls. Its initial part has 5 sharp, raised spiral lines and several irregularly spaced axial lines, together forming a large-meshed net. The spiral lines cover only the first half of the protoconch; the later half is perfectly smooth, except a distinct collabral rib immediately before the teleoconch. The teleoconch of the holotype has 1.4 whorls of rapidly increasing diam¬eter, separated by a deep suture. The axial sculpture consists of sharp, dense, granular incremental lines, starting at the suture and continuing into the umbilicus. There is no spiral sculpture. The umbilicus is widely open and not surrounded by any basal area or sculpture. The aperture is drawn out peripherally basally and is cemented to the preceding whorl for a short distance. Dimensions. Diameter of holotype 1.56 mm. Operculum : Thin, multispiral, round. Radula : Rather long and slender, 15 — 7—1 — 7 — 15. The teeth of the central field have drawn-out bases. The central tooth has a slender, triangular, ser¬rated cutting edge and sturdy anterolateral supports. The lateral teeth are uniform, somewhat taller laterally, with strong, interlocking lateral supports and triangular, serrated cutting edges. There is no lateromarginal plate. The marginal teeth are unusually few, oarshaped, with a simple, serrated apical part. Despite being known from only three specimens and our uncertainty as to whether they are adult or not, we find this species worth formal recognition. The strange protoconch sculpture (which can be seen with a stereo microscope) will probably make it easy to recognize.
Warén A. & Bouchet P. (1993) New records, species, genera, and a new family of gastropods from hydrothermal vents and hydrocarbon seeps.
Distribution
Author: Jan Delsing
Text ID: 108445
Text Type: 3
Page: 0
Created: 2021-05-01 11:39:11 - User Delsing Jan
Language: EN
Text function: [[t:575799,textblock=108445,elang=EN;Distribution]]
Hydrothermasl vents. Fiji. North-Fiji Basin.
Warén A. & Bouchet P. (1993) New records, species, genera, and a new family of gastropods from hydrothermal vents and hydrocarbon seeps.