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・ Margarites gunnerusensis
・ Margarites helicinus
・ Margarites hickmanae
・ Margarites huloti
・ Margarites imperialis
・ Margarites keepi
・ Margarites kophameli
・ Margarites koreanicus
・ Margarites laminarum
・ Margarites miona
・ Margarites mirabilis
・ Margarites olivaceus
・ Margarites picturatus
・ Margarites pilsbryi
・ Margarites pribiloffensis
Margarites pupillus
・ Margarites refulgens
・ Margarites rossicus
・ Margarites ryukyuensis
・ Margarites salmoneus
・ Margarites schantaricus
・ Margarites scintillans
・ Margarites shinkai
・ Margarites simbla
・ Margarites smithi
・ Margarites sordidus
・ Margarites striatus
・ Margarites toroides
・ Margarites vahlii
・ Margarites vityazi


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Margarites pupillus : ウィキペディア英語版
Margarites pupillus

''Margarites pupillus'', common name the puppet margarite or the little margarite, is a species of sea snail, a marine gastropod mollusk in the family Margaritidae, the turban snails.〔Rosenberg, G. (2012). ''Margarites pupillus'' (Gould, 1849). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=528731 on 2012-09-01〕〔Turgeon, D.D., et al. 1998. Common and scientific names of aquatic invertebrates of the United States and Canada. American Fisheries Society Special Publication 26〕
==Description==
The size of the shell varies between 8 mm and 20 mm. The solid shell has a conical shape and is narrowly umbilicated. It is lusterless, ashen or whitish. It is a very variable shell. Southward the color becomes deeper, of a salmon hue, and the sculpture finer. The surface is spirally traversed by unequal cord-like lirae, separated by sharply crispate-striate interspaces, as wide or wider than the ridges. The latter are nearly smooth or show traces of the oblique striation. Upon the last 1½ whorls there is usually a spiral thread in the inter-liral spaces. Above this there are 4 or 5 lirae on each whorl. Upon the base the concentric riblets decrease regularly in size from the center outward, and number about 12. The spire is elevated. The apex is subacute. The sutures are impressed. The 6 whorls are convex, the last obtusely angled, flattened beneath. The aperture is very oblique, rounded, iridescent inside. The peristome is simple. The columella is arcuate, subreflexed at the umbilicus, often nearly closing it, united with the upper termination of the lip by a parietal callus. The funnel-shaped umbilicus is bounded by a carina. Its perforation is very small.〔(Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia )〕

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