Ondina coarctata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.Gofas, S. (2011). Ondina coarctata (Sars G.O., 1878). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141029 on 2012-01-12Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180-213
Description
The shell of the snail is thin, fragile, and pale yellowish in color, with a narrowly conical shape. The spire is long, slightly tapering, and ends in a conical-blunt apex. The shell has 6-7 tightly pressed whorls, with the last whorl being somewhat dilated. The base is relatively broad, occupying about half the length of the shell. The suture is slightly oblique and narrowly impressed. The aperture is oblong, expanding at the bottom, with a somewhat curved external lip. The columella is slightly arched, and the umbilicus is distinct and deep. The surface is covered with fine, uniform spiral lines. The length of the shell typically reaches about 5.2 mm. Distribution This species occurs in the following locations: European waters (ERMS scope) Arctic Norway United Kingdom Exclusive Economic Zone The species has been found in West Finnmark, Norway, it was first discovered by a few collected dead specimens. It was found at depths of 50-100 fathoms (F.D.).
References
External links
Encyclopedia of Life World Register of Marine Species