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Ethaliella
''Ethaliella'' is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.〔Bouchet, P. (2012). ''Ethaliella'' Pilsbry, 1905. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=413461 on 2012-11-23〕〔Williams S.T., Karube S. & Ozawa T. (2008) Molecular systematics of Vetigastropoda: Trochidae, Turbinidae and Trochoidea redefined. Zoologica Scripta 37: 483–506.〕
==Description==
This genus is characterized by a depressed, openly umbilicated, smoothish shell. The peristome is obtuse. The columellar margin is dilated, partly vaulting over the umbilicus, which is radially sulcate within and has a very low, wide and rounded marginal cord.
This genus comprises species related to ''Monilea'', ''Ethalia'' and ''Isanda'', but with features of the columellar lip and umbilicus unlike either. ''Minolia'' and its boreal ally ''Solariella'' differ by the almost or quite unexpanded columellar margin.〔( Henry Pilsbry, New Japanese Marine Mollusca; Proceedings of the Academy of Natural Sciences of Philadelphia, Vol. 57 (1905), pp. 101-122 )〕
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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