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・ Calliotropis echidnoides
・ Calliotropis effossima
・ Calliotropis elephas
・ Calliotropis eltanini
・ Calliotropis equatorialis
・ Calliotropis ericius
・ Calliotropis eucheloides
・ Calliotropis excelsior
・ Calliotropis francocacii
・ Calliostoma poupineli
・ Calliostoma problematicum
・ Calliostoma psyche
・ Calliostoma pulchrum
・ Calliostoma punctulatum
・ Calliostoma purpureum
Calliostoma quadricolor
・ Calliostoma regale
・ Calliostoma rema
・ Calliostoma richeri
・ Calliostoma roseolum
・ Calliostoma rosewateri
・ Calliostoma rota
・ Calliostoma rubroscalptum
・ Calliostoma rude
・ Calliostoma rufomaculatum
・ Calliostoma sagamiensis
・ Calliostoma sakashitai
・ Calliostoma sanjaimense
・ Calliostoma santacruzanum
・ Calliostoma sapidum


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Calliostoma quadricolor : ウィキペディア英語版
Calliostoma quadricolor

''Calliostoma quadricolor'' is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Some authors place this taxon in the subgenus ''Calliostoma (Fautor)''.
==Description==
(Original description by M.M. Schepman) The height of the shell attains 8½ mm. The imperforate shell has an elevated-conical shape, with slightly concave sides. It is yellowish, with a greenish tinge. The peripheral keel is articulated with white and rufous. The spire is purplish at the top. The 7 whorls are flat. The nucleus is nearly smooth, under the lens with a few rows of pits. The other whorls are covered with spirals, 2 on the upper whorls, increasing to 7 on the body whorl. These spirals are crossed by concentric ribs, connecting the spirals and producing beads in crossing them, the lowest, bicoloured spiral of each whoid is the strongest The beads on it become spiny, and form a conspicuous keel on the body whorl, it is double. The base of the shell is flat, with 13 unequal spirals, crossed by numerous radiating ribs, making them beaded. The aperture is rhombic. The upper margin is straight, the basal one slightly convex. The columella is cylindrical, slightly concave, angular at its junction with the basal margin. The outer wall is
grooved interiorly by about 5 shallow grooves.〔(Schepman 1908-1913, The Prosobranchia of the Siboga Expedition; Leyden,E. J. Brill,1908-13 )〕

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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