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Syrnola thelma : ウィキペディア英語版 | Syrnola thelma
''Syrnola thelma'' is an extinct species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies. 〔 W.H. Dall (1913), ''On a Brackish Water Pliocene Fauna of the Southern Coastal Plain''; Proceedings U. S. National Museum, Vol. 46—No. 2023 〕 ==Description== The small shell has an elongate-conic shape. It has a smooth appearance, except for incremental lines. The suture is distinct but not deep. The apical portion is decollate. The aperture is narrowly ovate. The outer lip is simple and blunt. The base of the shell rounds into a strongly twisted short pillar. The body of the shell has no visible callus. The length of decollate fragment (two whorls) measures 2 mm, the diameter 1 mm. 〔
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