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Infundibulum (gastropod) : ウィキペディア英語版 | Infundibulum (gastropod)
''Infundibulum'' is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails. ==Description== The conical shell is false-umbilicate. The periphery is angular. The base of the shell is nearly flat, or concave. The outer surface is smooth, costate or granular. The outer lip is not lirate within. The columella is inserted in the center of the axis. It is more or less folded above, its edge straight, oblique, not toothed, and without a notch at its base.〔(H. Pilsbry, Manual of Conchology XI, Academy of Natural Sciences, Philadelphia )〕
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