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Calthalotia mundula : ウィキペディア英語版 | Calthalotia mundula
''Calthalotia mundula'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.〔Marshall, B. (2013). Calthalotia mundula (A. Adams & Angas, 1864). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=719242 on 2014-01-09〕 ==Description== The size of the shell attains 20 mm. The subperforate shell has an elevated-conical shape. It is whitish, obsoletely painted with longitudinal purplish flammules. The plane whorls are concave in the middle. At the sutures they show a prominent rounded ridge, transversely lirate. The lirae are equal and subgranulose. The base of the shell is concentrically lirate, with radiating striae in the interstices. The aperture is subquadrate. The arcuate lip ends anteriorly in an obtuse tooth. The lip is obsoletely sulcate within.〔(Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia ) (described as ''Cantharidus mundula'')〕
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