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Scale Bar = 10 micrometers.

Raphe deflects dorsally at the central margin and ventrally at the apices. Raphe is located almost halfway between the dorsal and ventral margins. Striae are coarsely punctate and radiate around the central area, gradually shifting to parallel near the apices. The length of specimens ranged from 51-57 microns. Width ranged from 19-20 microns. There were between 6-10 stria per 10 microns. Valves are thickly silicified.