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Pulchrastele septenarium
''Pulchrastele septenarium'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.〔Rosenberg, G. (2012). ''Pulchrastele septenarium'' (Melvill & Standen, 1899). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=594211 on 2012-11-23〕
==Description==
The shell grows to a length of 13 mm. The solid, pyramidally conical shell is deeply but narrowly umbilicate. The seven whorls are all, with the exception of the two apical which are smooth and glossy, closely spirally seven-ribbed. These ribs are thickly and regularly formed of gemmae (buds or bud-like growth), contiguous and crowded. The interstices between these beaded riblets are indistinctly obliquely striated. The body whorl is sharply angled at the periphery. At the base there are eight or nine concentric rows of the same kind of beaded ribs as under the whorls. Tbe interstices are very similarly obliquely striate. The aperture is square. The outer lip is slightly thickened, whilst at the columellar margin a small central tooth is observable. 〔 ( Melvill, J.C. & Standen, R. 1899. Report on the marine Mollusca obtained during the first expedition of Prof. A.C. Haddon to the Torres Straits in 1888-89.; The Journal of the Linnean Society of London v.27 (1899-1900) ) (described as ''Calliostoma (Eutrochus) septenarium'')〕
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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