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Pyrgulina
''Pyrgulina'' is a small genus of very small sea snails, pyramidellid gastropod mollusks or micromollusks. This genus is currently placed in the subfamily Chrysallidinae of the family Odostomiidae.〔Bouchet, P. (2011). Pyrgulina A. Adams, 1864. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=236150 on 2011-11-28〕 ==General description== The whorls of the teleoconch are sculptured similarly throughout. Varices are absent. The shell is marked with strong axial ribs which extend from the summit to the umbilical area The spiral markings consist of impressed lines. The fine, incised spiral striations are subequally spaced and present at the intercostal spaces between the sutures and on the base of the whorls.〔(W.H. Dall and P. Bartsch, "A Monograph of West American Pyramidellid Mollusks" , Smithsonian Institution, p. 14 and 169; 1909 )〕
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