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Pyramidula pusilla : ウィキペディア英語版 | Pyramidula pusilla
''Pyramidula pusilla'' is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Pyramidulidae. == Shell description == The width of the shell is up to 2.95 mm, the height is up to 2.25 mm.〔Gittenberger E. & Bank R. A. 1996. A new start in Pyramidula (Gastropoda Pulmonata: Pyramidulidae). Basteria 60: 71-78.〕 In colour it is dark brown. The shell form is low conical, broader than high. The apical whorls regularly increase. The umbilicus is 1/4 of the diameter (in some Spain localities 1/3). Growth are lines fine and narrow, sometimes weak.
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「Pyramidula pusilla」の詳細全文を読む
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