Stenoma iocoma is a moth of the Depressariidae family. It is found in Guyana and French Guiana. The wingspan is 19-22 mm. The forewings are light violet-grey with the costal edge whitish-ochreous and with short fine whitish-ochreous lines from the base in the middle and on the fold. There are faint hardly perceptibly darker somewhat curved transverse shades at one-third, three-fifths, and four-fifths. The hindwings are grey.