Popis
Autor: Jan Delsing
Text ID: 83769
Text Type: 1
Page: 0
Založeno: 26.05.2016 21:04:15 - Uživatel Delsing Jan
Poslední změna: 26.05.2016 21:08:15 - Uživatel Delsing Jan
Language: EN
Odkazová funkce: [[t:1190932,textblock=83769,elang=EN;Popis]]
The shell is small, fairly solid, conical, colourless, with a rather large, expanding aperture. The larval shell consists of about one visible, perfectly smooth, strongly protruding whorl of a diameter of 0.35 mm. The teleoconch has 3.2 moderately convex whorls of slowly increasing diameter, with a main sculpture of 15-20 distinctly prosocline broad, axial ribs per whorl. There are also two strong spiral ribs, just below the periphery and a more indistinct one at the pheriphery. The axial ribs stop at the lowermost spiral rib and leave the basal area smooth, except for the growth lines and an occasional rib that may continue. The suture is deep, not channelled. The aperture is ovate, its lower part is distinctly expanded. The parietal wall is covered by a thin callus. There is no columellar fold present. The umbilicus consists of a very narrow crevice between the inner lip and the parietal wall. Height of holotype 1.94 mm.
Source, Warén, A. 1991, New and little known Mollusca from Iceland and Scandinavia. Part 1. (Original description)
Rozšíření
Autor: Jan Delsing
Text ID: 83770
Text Type: 3
Page: 0
Založeno: 26.05.2016 21:05:29 - Uživatel Delsing Jan
Language: EN
Odkazová funkce: [[t:1190932,textblock=83770,elang=EN;Rozšíření]]
North Atlantic, Greenland, Iceland and Norway.