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Granigyra limata
''Granigyra limata'' is a species of sea snail, a marine gastropod mollusk, unassigned in the superfamily Seguenzioidea.
==Description==
(Original description by W.H. Dall) The size of the shell varies between 2 mm and 2.5 mm. The small, white shell has almost exactly the shape of ''Trochus fulgidus'' Jeffreys, but a little smaller, with three extremely rounded whorls covered with small close-set irregular granulations of nearly uniform size like sand grains. The base of the shell has a small perforate umbilicus, into which the whorl rounds without carina, callus, or break of any kind. The circular aperture has thin, sharp, uniform, not reflected margins. This singular little shell has the typical characteristics of a ''Cyclostrema'' in its conchological features, except for its granular surface. 〔 (Dall W. H. 1889. Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1879-80), by the U.S. Coast Survey Steamer "Blake", Lieut.-Commander C.D. Sigsbee, U.S.N., and Commander J.R. Bartlett, U.S.N., commanding. XXIX. Report on the Mollusca. Part 2, Gastropoda and Scaphopoda. Bulletin of the Museum of Comparative Zoölogy at Harvard College 18: 1-492, pls. 10-40 ) (described as ''Cyclostrema limatum'') 〕
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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