Ithycythara cymella is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

(Original description) The long, slender shell has a subhyaline and polished aspect.

Its color is translucent, with a faint yellowish band in front of the suture, visible between the ribs, and two or three spiral series of faint spots on the ribs in front of the yellow on the body whorl, or all whitish.

The spiral sculpture consists of numerous fine impressed lines, strongest on the ribs of which they faintly crenulate the crests, and well marked on the siphonal canal where the interspaces are slightly raised and rounded.

[2] I. cymella can be found in the Gulf of Mexico and the Caribbean waters, ranging from the western coast of Florida to Barbados.