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Pupilla alpicola : ウィキペディア英語版 | Pupilla alpicola
''Pupilla alpicola'' is a species of minute air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Pupillidae. == Description == The shell of this species slightly larger than that of ''Pupilla muscorum'', with slightly more prominent growth lines, around 6 not very convex whorls. The shell apex is flat (in contrast to ''Pupilla muscorum'' and ''Pupilla pratensis''). The apertural lip is weak; the cervical callus is weak; there are usually no teeth in the aperture, occasionally a weak parietal tooth. Note the presence of a characteristic gutter-like depression in the external surface of the last whorl, at about 1/4 of the distance from its base. (In oblique light this is also visible in the aperture as a narrow, delicate ridge).〔 The height of the shell is 2.8–3.3 mm. The width of the shell is 1.75–1.8 mm.〔
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「Pupilla alpicola」の詳細全文を読む
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