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Crossea cancellata : ウィキペディア英語版 | Crossea cancellata
''Crossea cancellata'' is a species of small sea snail or micromollusc, a marine gastropod mollusc in the family Crosseolidae.〔Bouchet, P. (2012). ''Crossea cancellata'' Tenison-Woods, 1878. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=596653 on 2012-09-01〕 ==Description== (Original description by Tenison-Woods) The diameter of this minute, white shell scarcely attains 1.5 mm. The shining, turbinated shell contains three whorls which are beautifully cancellated by close spiral ribs and distinct oblique striae. The apex is smooth. The aperture is circular and conspicuously channelled above and below. Behind the inner lip there is a narrow groove forming a false umbilicus, then a rounded spiral rib, and then a broad regularly striate groove on the base.〔(Papers and proceedings of the Royal Society of Tasmania, 1877, p. 122 )〕
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