Ilyanassa obsoleta

[1] This species has a small shell with a slightly rough exterior, because the surface has intersecting weak spiral and axial ribs.

The shell has an oval aperture with a small notch or siphonal canal at the anterior end.

The indigenous distribution of this western Atlantic species is from Nova Scotia to Georgia in the United States.

[3] This snail is very common on mud flats in the intertidal and shallow subtidal zones, in sounds and inlets.

This species is a detritus feeder, eating whatever is found in the film on top of the mud where it lives, including many microscopic marine plants.