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・ Sinezona bandeli
・ Sinezona beddomei
Sinezona brevis
・ Sinezona brucei
・ Sinezona calumnior
・ Sinezona carolarum
・ Sinezona chilensis
・ Sinezona cingulata
・ Sinezona confusa
・ Sinezona costulata
・ Sinezona danieldreieri
・ Sinezona doliolum
・ Sinezona enigmatica
・ Sinezona ferriezi
・ Sinezona finlayi
・ Sinezona garciai
・ Sinezona globosa


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Sinezona brevis : ウィキペディア英語版
Sinezona brevis

''Sinezona brevis'' is a species of minute sea snail, a marine gastropod mollusc in the family Scissurellidae.〔Bouchet, P. (2013). Sinezona brevis (Hedley, 1904). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=492810 on 2013-03-23〕
==Description==
The white shell reaches a height of 1 mm. The solid shell has a depressed, turbinate shape. It is openly perforate to imperforate. The sculpture shows distant longitudinal lamellate ribs that cross the whorl from the suture to the umbilicus. Their interstices contain raised spiral threads, which grow coarser on approaching the umbilicus. The protoconch contains 1½ whorl, concluding with a prominent varix. The three whorls are tabulate above, and rounded below. The body whorl descends rapidly. The aperture is roundly ovate. The sharp outer lip is convex. The inner lip spreads as a distinct callosity over the body, and sometimes seals the umbilicus partly or wholly up. The columella is concave. The narrow umbilicus is deep, and is bordered with a raised ridge, or is closed up. The
foramen is large, and distant from the margin, to which a furrow joins it. The fasciole is extremity short, terminating half a whorl behind the aperture. it is bordered
by keels and is traversed by lamellae, which correspond to the longitudinal ribs.〔(Suter H. (1913-1915), Manual of new Zealand Mollusca; Wellington, N. Z. :J. Mackay, govt. printer,1913-1915 )〕

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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