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Spectamen semisculptum : ウィキペディア英語版 | Spectamen semisculptum
''Spectamen semisculptum'' is a species of sea snail, a marine gastropod mollusk in the family Solariellidae.〔Bouchet, P. (2012). ''Spectamen semisculptum''. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=567680 on 2012-12-03〕〔Herbert D.G. (1987). Revision of the Solariellinae (Mollusca: Prosobranchia: Trochidae) in southern Africa. Annals of the Natal Museum 25(2):283-382.〕 ==Description== The height of the shell attains 3.1 mm, its diameter 4.6 mm. The thin, white shell has a depressed turbinate shape with a wide umbilicus. The acute spire is conoid. It contains 4½ convex whorls. The suture is distinct, and not channeled. The umbilicus is funnel-shaped. The rounded aperture is slightly oblique. The peristome is thin, outer margin very colunellari slightly arched. The outer lip is pronounced. The columella is slightly arched.〔( von Martens (1904) Die beschalten Gastropoden der deutschen Tiefsee-Expedition, 1898–1899.. In. A. Systematisch-geographischer Theil., vol. 7 Wissenschaftliche Ergebnisse der deutschen Tiefsee-Expedition auf dem Dampfer "Valdivia" 1898–1899, 1–146 ) (described in Latin as ''Cyclostrema (Tubiola) semisculptum'')〕
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