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.
Distribution A fragment of the shell of this brackish water species has been found near Alexandria, Louisiana.
References
External links Paleobiology database : Syrnola thelma