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Scissurella supraplicata
''Scissurella supraplicata'' is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Scissurellidae, the little slit snails.〔Bouchet, P. (2013). ''Scissurella supraplicata'' E. A. Smith, 1875. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=493092 on 2013-02-16〕〔Zelaya D.G. & Geiger D.L. (2007). Species of Scissurellidae and Anatomidae from Sub-Antarctic and Antarctic waters (Gastropopda: Vetigastropoda). Malacologia 49(2):393-443.〕〔Geiger D.L. (2012) Monograph of the little slit shells. Volume 1. Introduction, Scissurellidae. pp. 1-728. Volume 2. Anatomidae, Larocheidae, Depressizonidae, Sutilizonidae, Temnocinclidae. pp. 729-1291. Santa Barbara Museum of Natural History Monographs Number 7. (30 October 2012)〕
==Description==
The height of the shell reaches 1 mm. The shell has a heliciform shape. The thin spire is short, narrowly perforate, and semi-pellucid. It has a white color with a caducous rather thick pale olive epidermis. The spire consists of three whorls, the first ? (abrupt), the second a little convex, somewhat planulate above and radiately arcuately plicate. The body whorl is large, having a thin double carina (slit fasciole) a little above the middle, radiately arcuately plicate above the carina, below it with stride of growth. The large aperture is irregularly circular, and very slightly expanded at the basal margi. The peristome is continuous. The deep, narrow slit is situated between the two thread-like keels. (〔 (G.W. Tryon (1890), Manual of Conchology vol. XII ) 〕
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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