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''Phorcus sauciatus'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.〔Gofas, S. (2012). ''Phorcus sauciatus'' (Koch, 1845). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=689178 on 2012-11-23〕〔Donald K.M., Preston J., Williams S.T., Reid D.R., Winter D., Alvarez R., Buge B., Hawkins S.J., Templado J. & Spencer H.G. 2012. Phylogenetic relationships elucidate colonization patterns in the intertidal grazers Osilinus Philippi, 1847 and Phorcus Risso, 1826 (Gastropoda: Trochidae) in the northeastern Atlantic Ocean and Mediterranean Sea. Molecular Phylogenetics and Evolution, 62(1): 35–45〕 ==Description== The size of the shell varies between 11 mm and 27 mm. The imperforate, rather thin shell has a low conical shape. The coloration is excessively mutable, as well as the general form. Its ground color is greenish, especially on the body whorl, usually purplish on the spire, and either: * spirally encircled by bands of dark green, black, or red oblong spots articulated with a lighter color * or obscurely mottled with reddish, the ground color covered with fine oblique or zigzag lines. The pattern is sometimes so obscurely mottled, spirally and obliquely treaked, that it appears nearly uniform olivaceous, especially on the body whorl. The conic spire is more or less elevated. The minute apex is acute, reddish, when not eroded. The sutures are well impressed. The shell contains six whorls that are spirally more or less obviously, finely, irregularly striate or lirate. The body whorl is rounded or subcarinated at the periphery. The base of the shell is somewhat convex, more or less impressed around the axis, sometimes eroded in front of the aperture. The large aperture is very oblique. The outer lip contains a black-spotted green edge, which is generally followed by a broad thin opaque-white band, within which it is nacreous and iridescent. The oblique columella is thin-edged, the edge convex in the middle. The columellar area is white and more or less eroded. The umbilical tract is covered by a thick pad of enamel.〔(Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia ) (described as ''Monodonta sauciata'')〕 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「Phorcus sauciatus」の詳細全文を読む スポンサード リンク
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