Popis
Autor: Jan Delsing
Text ID: 90044
Text Type: 1
Page: 0
Založeno: 28.09.2018 00:30:58 - Uživatel Delsing Jan
Language: EN
Odkazová funkce: [[t:1253092,textblock=90044,elang=EN;Popis]]
Shell minute, white, moderately solid, discoidal, widely umbilicate and loosely coiled. Whorls 2,75, plus a smooth low convex protoconch of 1,25 whorls. Spire not raised above the body whorl. Coiling rapid, latter half of body whorl bent slightly downwards. Sculpture of indistinct spiral cords, crossed by microscopic axial lines of growth. There are five spiral cords on the penultimate whorl, and five on the base that are considerably stronger than the rest. These five stronger basal cords extend from in front of the suture to the edge of the umbilicus. The wall of the umbilicus is smooth and the remainder of the body whorl, apart from the five cords, is crowded with closely spaced fine spiral threads. Umbilicus wide, perspective, about one-third the diameter of the base. Aperture circular. Peristome continuous, slightly thickened, actually detached from the parietal wall, and strongly recurrent at the suture. Height o,8 mm.; diameter 1,25 mm. (Holotype).
Powell, A.W.B. 1937 New species of marine Mollusca from New Zealand.
Možné záměny
Autor: Jan Delsing
Text ID: 90046
Text Type: 19
Page: 0
Založeno: 28.09.2018 00:32:33 - Uživatel Delsing Jan
Language: EN
Odkazová funkce: [[t:1253092,textblock=90046,elang=EN;Možné záměny]]
This species is characterized by its loose coiling, discoidal shape, aperture recurrent at suture, and lack of umbilical crenulations.
Powell, A.W.B. 1937 New species of marine Mollusca from New Zealand.
Rozšíření
Autor: Jan Delsing
Text ID: 90045
Text Type: 3
Page: 0
Založeno: 28.09.2018 00:31:54 - Uživatel Delsing Jan
Language: EN
Odkazová funkce: [[t:1253092,textblock=90045,elang=EN;Rozšíření]]
Habitat: Off Three Kings Islands, St. 933, 260 m.
Powell, A.W.B. 1937 New species of marine Mollusca from New Zealand.