Stenoma niphacma is a moth of the family Depressariidae. It is found in French Guiana.[1]
The wingspan is about 15 mm. The forewings are dark slaty fuscous with the costal edge white from one-fourth onwards and with a white slightly irregular line from before the middle of the costa to two-thirds of the dorsum. There is a narrow white apical patch, attenuated to below the middle of the termen, marked with three blackish dots on the apical edge. The hindwings are rather dark grey.[2]