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Clanculus undatoides : ウィキペディア英語版 | Clanculus undatoides
''Clanculus undatoides'' is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.〔Rosenberg, G. (2012). ''Clanculus undatoides'' Tenison-Woods, 1879. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=594212 on 2012-11-23〕 ==Description== The height of the shell attains 10 mm, its diameter also 10 mm. The rather small, somewhat solid shell is turbinately conoid. It is opaque, reddish rose with indistinct purple spots. The 5½ flat whorls increase rapidly in size. They are margined below, girdled with 6 series of rounded granules, of which the lowest line is the smallest. They increase gradually in size to the suture, which is coronate and broadly canaliculate. The base is flattened, ornamented with 8 spiral lines of close rose colored granules. The rhomboid aperture contains a thickened lip, which is lirate inside. The columella has two obtuse, blunt tubercles above and below, and intermediate small obsolete teeth. The narrow umbilicus is white, with a rather conspicuous white margin. 〔 (H. Pilsbry, Manual of Conchology XI, Academy of Natural Sciences, Philadelphia ) (described as ''Trochus undatoides'' )〕
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