Iotyrris cerithiformis is a species of sea snail, a marine gastropod mollusk in the family Turridae, the turrids.

(Original description by Pease) The fusiform, turreted shell is keeled all over.

The color of the shell is white, the keels are spotted with reddish brown.

[citation needed] The above species may be distinguished by the regularity of its keels.

[2] This marine species occurs off the Hawaii Islands at a depth of 11 m to 15 m.