Dichomeris cyanoneura is a moth in the Gelechiidae family. It was described by Meyrick in 1922. It is found in Guyana and Brazil (Para). The wingspan is 14-15 mm. The forewings are rather dark chocolate-brown, with the costa and veins on the costal area streaked deep violet-blue and the extreme costal edge whitish. The dorsal edge and veins towards the dorsum are less distinctly streaked violet-grey and the median third from the base to the termen is variably streaked or suffused light ochreous-yellowish, leaving darker oval spots of ground colour in the disc before and beyond the middle. The hindwings are rather dark grey.