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・ Odostomia stephensae
・ Odostomia striata
・ Odostomia striolata
・ Odostomia strongi
・ Odostomia subdotella
・ Odostomia subglobosa
・ Odostomia sublirulata
・ Odostomia suboblonga
・ Odostomia subscripta
・ Odostomia subturrita
・ Odostomia sulcosa
・ Odostomia lucasana
・ Odostomia lucca
・ Odostomia lukisii
・ Odostomia lutea
Odostomia mammillata
・ Odostomia manukauensis
・ Odostomia mara
・ Odostomia marci
・ Odostomia margarita
・ Odostomia marginata
・ Odostomia mariae
・ Odostomia martensi
・ Odostomia martinensis
・ Odostomia mauritiana
・ Odostomia mayii
・ Odostomia megerlei
・ Odostomia meijeri
・ Odostomia melitta
・ Odostomia mendozae


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Odostomia mammillata : ウィキペディア英語版
Odostomia mammillata

''Odostomia mammillata'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.〔WoRMS (2011). ''Odostomia mammillata'' Carpenter, 1856. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575868 on 2011-11-10〕 〔Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064:〕
This species has been reported by G.W. Tryon as ''Odostomia mamillata'' Carp. in his book ''Manual of Conchology'' vol. VII, page 359 (1889).
==Description==
The ovate, milk-white shell lacks axial or spiral sculpture excepting microscopic growth lines. The length of the shell is 1.1 mm. The whorls are flattened. The whorls of the protoconch are large, oblique and two-thirds immersed in the first of the succeeding turns. The whorls of the teleoconch are decidedly flattened, smooth and rather high between the sutures. The sutures are well impressed. The periphery is marked by a slender, raised cord, which renders it angulated. The base of the shell is rather short and slightly inflated immediately below the umbilical area. The aperture is broadly oval. The posterior angle is acute. The outer lip is thin and angulated at the periphery. The columella is short, slender, strongly curved and slightly reflected. The parietal wall is covered by a strong callus. 〔 ( William Healy Dall and Paul Bartsch , "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, 1909 ) 〕

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