Aorotrema cistronium

The small, white shell has a polished nucleus, one and a half rounded and as many more carinated whorls.

The spiral sculpture consists of on the summit seven or eight, between the carinae six or eight, and on the base ten or fifteen extremely fine threads.

It rises to the edge of the umbilicus, which is marked by a strong thread, and within is vertically striated.

The simple margin is sharply angulated by the carinations, otherwise the aperture would be ovate, with the columellar side somewhat excavated.

[2] This species occurs in the Atlantic Ocean off North Carolina and in the Gulf of Mexico off Texas at depths between 14 m and 115 m.[3]