Description
Author: Jan Delsing
Text ID: 83857
Text Type: 1
Page: 0
Created: 2016-05-29 12:18:40 - User Delsing Jan
Language: EN
Text function: [[t:1191058,textblock=83857,elang=EN;Description]]
Shell: Semitransparent, glossy of a greenish-yellow hue. Cyrtoconoid to conical, with distinctly convex whorls. Maximum shell length 3.1 mm. Growth lines nearly orthocline. Sculpture consisting of shallow and wavy axial ribs fading away on the lower part of the body whorl. No spiral sculpture. Columellar tooth is barely visible. Protoconch large, smooth and glossy. Soft parts: Eyes black, fairly large with distance between double the diameter. Operculum: Not studied.
Source: Hoisaeter, 2014. The Pyramidellidae of Norway and adjacent waters.
Distribution
Author: Jan Delsing
Text ID: 83858
Text Type: 3
Page: 0
Created: 2016-05-29 12:20:27 - User Delsing Jan
Language: EN
Text function: [[t:1191058,textblock=83858,elang=EN;Distribution]]
Type locality: Norwegian continental slope, off NW Norway, 640-1187 m.
Norwegian Sea and lower slope off Norway. Until recently recorded only a few times. Friele (1886) reported it from three stations 66° 640 m, 68° 1150 m, and 69° 1187 m. Grieg (1915) reported a single specimen from the slope outside 'Tampen' (62°15'N, 0°15'E, 800 m). Waren (1991) added two shells from south of Jan Mayen and one shell from northeastern Iceland. Waren (1993) reported it from two stations on the slope north of the Faroes, while Schander (1995) reported it from seven BIOICE stations in the Norwegian Sea north and east of Iceland. In my material nine specimens from five stations, all on the slope at negative temperatures, 62°31.5rN, 701 m, one specimen; 62°12'N, 708 m, three specimens; 63°10'N, 830 m, one specimen; and 63°13'N, 1003 m, three specimens. So far only reported from negative temperature water masses from the continental slopes around the Norwegian Sea (see Hoisseter 2010).
Source: Hoisaeter, 2014. The Pyramidellidae of Norway and adjacent waters.
Taxonomy
Author: Jan Delsing
Text ID: 83859
Text Type: 15
Page: 0
Created: 2016-05-29 12:22:46 - User Delsing Jan
Language: EN
Text function: [[t:1191058,textblock=83859,elang=EN;Taxonomy]]
This species is little known, and only occasionally mentioned in the literature. It is apparently not closely related to any of the other pyramidellids from our region. Three different generic designations have been proposed for it, none of them satisfying. The original designation to Odostomia by Friele was correct enough according to the system used by him, but the attempts to transfer it to Turbonilla (by Kobelt 1903) or to Chrysallida (or Odostomella, Nordsieck 1972) lack factual support. The species' closest congeners must probably be sought among species known from Arctic waters, maybe Menestho or Aartsenia.
Source: Hoisaeter, 2014. The Pyramidellidae of Norway and adjacent waters.