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Punctum minutissimum : ウィキペディア英語版 | Punctum minutissimum
''Punctum minutissimum'' is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Punctidae, the dot snails. ==Shell description== The shell of ''Punctum minutissimum'' is slightly translucent and pale brown in color. It is 1.1 to 1.3 mm wide, and has 3.5 to 4.5 whorls. The outer shell surface has a sculpture of radial striae, which are obvious under magnification. The underside of the shell has a very wide umbilicus, almost 25% of the shell's width.〔Burch J. B. (1962). ''How to Know the Eastern Land Snails''. WM. C Brown Co., Dubuque, IA.〕
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「Punctum minutissimum」の詳細全文を読む
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