About Ilyanassa trivittata (Say, 1822)
The shell of Ilyanassa trivittata is conical, sharply pointed, and yellowish-white in color. Its surface is cancellate, which gives it a granulated appearance marked by prominent, equally spaced granules. The body whorl has ten revolving impressed lines, and a somewhat more noticeable groove sits near the top of each whorl. The spire is equal in length to or longer than the body whorl, and bears a reddish-brown revolving line near the suture. The body whorl has three reddish-brown lines: one positioned near the suture, one in the middle, and a third, darker line at the origin of the beak. The suture is regular and deeply impressed. The beak is separated from the body whorl by a deep depression and is slightly reflected. The outer lip is not thickened, but has raised lines inside the fauces that do not reach all the way to the lip's edge. The inner lip is distinctly lamellar, with an indistinct fold along its basal edge and a tooth near the upper point where it meets the outer lip. This marine species is found in the Northwest Atlantic Ocean, off the coast of Canada in the Gulf of Saint Lawrence and Bay of Fundy.
