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''Gibberula'' is a genus of minute sea snail, a marine gastropod mollusk or micromollusk in the family Cystiscidae, previously placed in the family Marginellidae, the margin shells or marginellids.〔 (Note: Gastropod taxonomy has been in flux for many years. This is especially true currently, because of new research in molecular phylogeny. Because of all this ongoing change, different reliable sources can yield very different classifications, especially within certain poorly understood groups.) The type species of the genus ''Gibberula'' Swainson, 1840 is ''G. zonata'' Swainson. Other genus-group names are available for small shells resembling ''Gibberula''. These include ''Granula'' Jousseaume, 1875 and ''Kogomea'' Habe, 1951. They are distinguished from ''Gibberula'' only on the basis of smaller size and other rather tenuous conchological differentiations. == Shell description == The shell of this genus is 1.5 to 10 mm in length, ovoid, stout, with a small, low spire. The outer lip is thickened but without an external varix. It is usually denticulated inside. The columella has several plaits on a thickened rim, decreasing in size towards the posterior end. The siphonal canal is distinctly notched. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Gibberula」の詳細全文を読む スポンサード リンク
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