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・ Menestho felix
・ Menestho hypocurta
・ Menestho shataii
・ Menestho truncatula
・ Menestreau
・ Menet
・ Menet (princess)
・ Menetia
・ Menetou-Couture
・ Menetou-Râtel
・ Menetou-Salon
・ Menetou-sur-Nahon
・ Menetrey
・ Menetries's warbler
・ Menetus
Menetus dilatatus
・ Menevian Group
・ MENEW
・ Menexenus
・ Menexenus (dialogue)
・ Menez
・ Menezes
・ Menfi
・ Menfro
・ Menfro, Missouri
・ Meng
・ Meng (river)
・ Meng (surname)
・ Meng and Ecker
・ Meng Caicheng


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Menetus dilatatus : ウィキペディア英語版
Menetus dilatatus

''Menetus dilatatus'' is a species of small air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.
== Shell description ==
The shell is small, of a yellowish green-color, minutely wrinkled by the lines of growth. The spire is flat,〔 composed of 2.5-3 whorls,〔 separated by a well-defined suture. The outer whorl has a sharp margin on a level with the spire, diminishing near, but still modifying, the aperture. Below this line the whorl is very convexly rounded so as to encircle a small, deep, abruptly formed umbilicus. This whorl rapidly enlarges, and terminates in a very large, not very oblique aperture, with the lip expanded so as to make it trumpet-shaped.〔
The width of the shell is 2–3 mm.〔 The height of the shell is 0.9 mm.〔Glöer P. (2002). ''Die Süßwassergastropoden Nord- und Mitteleuropas''. Die Tierwelt Deutschlands, ConchBooks, Hackenheim, 326 pp., ISBN 3-925919-60-0, page 190-194.〕

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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