|
''Filopaludina martensi'' is a species of large freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Viviparidae. == Description == The shape of the shell is ovate-conic.〔 The apex is acute and violet-black in colour.〔 The umbilicus of the shell is very narrow.〔 There are fine spiral lines on the shell.〔 The color of the shell is green or dark brown-blackish.〔 The shell has 6-7 convex whorls.〔 Whorls are with upper spiral lines, some are obsolescently sculptured.〔 The last whorl is swollen.〔 The aperture is oblique, ovately rounded.〔 The aperture is cerulean-white in colour.〔 The upper part of the aperture is not acute.〔 The peristome is straight, thick, blunt, often outwardly blackish.〔 The width of the shell is up to .〔 The height of the shell is up to .〔 The length of the aperture is up to .〔 The operculum has the color of horn with golden shining and it is widely ovate. There are concentric lines on the operculum.〔 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「Filopaludina martensi」の詳細全文を読む スポンサード リンク
|