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Anisus vortex : ウィキペディア英語版 | Anisus vortex
''Anisus vortex'' is a species of small freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ram's horn snails and their allies. 〔 Bouchet, P. (2014). Anisus vortex (Linnaeus, 1758). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=716345 on 2014-11-24 〕 ==Description== The shell is only 0.8 to 1.1 mm high and measures up to 9 mm in diameter. It has up to 7 whorls. The shell is flattened at the functional lower side, concave at the upper side. On the top, the whorls are flat, separated only by a slightly pronounced seam. On the bottom, however, the whorls are more curved and separated by a distinct suture. Shell with very sharp keel.
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「Anisus vortex」の詳細全文を読む
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