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Munditia meridionalis
''Munditia meridionalis'' is a species of small sea snail, a marine gastropod mollusk, in the family Liotiidae.〔Bouchet, P. (2013). ''Munditia meridionalis'' (Melvill & Standen, 1912). Retrieved through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=197289 on 3 September 2013〕〔Engl W. (2012) Shells of Antarctica. Hackenheim: Conchbooks. 402 pp.〕
==Description==
The height of this minute shell attains 0.75 mm and its diameter 0.50 mm. The delicate, white-gray shell has a depressed trochoidal shape and is deeply umbilicate. it contains 4 whorls. The nuclear whorls are slightly nepionic, and shapelessly turgid, but the penultimate and body whorl are very well sculptured and defined, being acutely spirally bicarinate.The aperture is round. The peristome is continuous. It is slightly thickened at the base around the umbilicus. Around the umbilicus, likewise, a third keel, crenulate, and not so acute, revolves.The dark red-brown operculum is multispiral with a not quite central nucleus. A pale straw-coloured epidermis covers the whole surface uniformly.〔(Melvill & Standen (1912), The Marine Mollusca of the Scottish National Antarctic Expedition. Transactions of the Royal Society of Edinburgh. v.48 (1912) ) (described as ''Cyclostrema meridionale'')〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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