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・ Calliostoma nakamigawai
・ Calliostoma nanshaense
・ Calliostoma necopinatum
・ Calliostoma nepheloide
・ Calliostoma nobile
・ Calliostoma nordenskjoldi
・ Calliostoma normani
・ Calliostoma nudiusculum
・ Calliostoma nudum
・ Calliostoma obesulum
・ Calliostoma occidentale
・ Calliostoma ocellatum
・ Calliostoma opalinum
・ Calliostoma oregon
・ Calliostoma orion
Calliostoma ornatum
・ Calliostoma osbornei
・ Calliostoma otukai
・ Calliostoma palmeri
・ Calliostoma paradigmatum
・ Calliostoma paucicostatum
・ Calliostoma pellucidum
・ Calliostoma penniketi
・ Calliostoma peregrinum
・ Calliostoma perfragile
・ Calliostoma periglyptum
・ Calliostoma pertinax
・ Calliostoma philippei
・ Calliostoma picturatum
・ Calliostoma platinum


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

''Calliostoma ornatum'', common name the ornate topshell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
==Description==
The height of the shell attains 20 mm. The ornate topshell is conical shaped. It is imperforate, rather solid but not thick. It may be brown, orange-red or a brilliant violet or pale yellowish, with radiating brown flames above. The base of the shell is dotted with brown and whitish. The sculpture though variable is characteristic.The surface of whorls is encircled by spiral lirae uneven in size, and cut into very close compressed granules. There are about 10 such lirae on the penultimate whorl, but the number is variable owing to the greater or less development of interstitial riblets. The base has 10-13 concentric riblets, which have a tendency to split or become double. They are wider than the interstitial furrows. The conical spire is elevated. The apex acute. The sutures are slightly impressed.The seven whorls are slightly convex. There are generally two or three stronger lirae near the middle or periphery, and this gives at times a slightly bicarinate outline to the body whorl. The flattened base is a little convex. The aperture is subrhomboidal and smooth inside. The arcuate columella is often bounded by a purple streak.〔(Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia )〕
The foot is orange and there are distinct black eye spots at the base of paired tentacles.〔Branch, G.M., Branch, M.L, Griffiths, C.L. and Beckley, L.E. 2010. ''Two Oceans: a guide to the marine life of southern Africa'' ISBN 978-1-77007-772-0〕

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「Calliostoma ornatum」の詳細全文を読む



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