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Clanculus bronni
''Clanculus bronni'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.〔Bouchet, P. (2012). ''Clanculus bronni'' (Dunker, 1860). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=547250 on 2012-11-23〕〔Poppe G.T., Tagaro S.P. & Dekker H. (2006) The Seguenziidae, Chilodontidae, Trochidae, Calliostomatidae and Solariellidae of the Philippine Islands. Visaya Supplement 2: 1-228.〕
==Description==
The size of the shell varies between 5 mm and 7 mm. The perforate shell has a globose-conoid shape. It is brownish and white variegated. The six whorls are convex, the last subangulate toward the base. The base of the shell is planoconvex. The narrow umbilicus crenated. The aperture is subrotund. The lip is costate within. The oblique columella terminates in a thick tooth. 〔 (H. Pilsbry, Manual of Conchology XI, Academy of Natural Sciences, Philadelphia ) 〕
The subspecies ''Clanculus bronni'' ssp. ''fraterculus'' H. A. Pilsbry, 1904 (synonym: ''Clanculus hizenensis fraterculus'' Pilsbry, 1904 - original combination) is described by Pilsbry as trochiform with a flattened base. The ground color is nearly white, radially maculated with brown on the upper surface and smaller spots interposed between the others at the peripheral region. The base has paler small spots on the ribs, sometimes partially arranged in radial stripes. The 5½ or 6 whorls are convex and parted by a narrow, deep suture. The apical 1½ whorls are uniform, the next whorls irregularly dotted with pink on a pale buff-brown ground.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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