Dorycnopa triphera is a moth of the Gelechiidae family. It was described by Lower in 1920. It is found in Australia, where it has been recorded from South Australia.
The wingspan is 14-16 mm. The forewings are dark fuscous, mixed with blackish and with dull ochreous markings. There is a moderately broad outwardly oblique fascia, anteriorly edged with fuscous, from just beneath the costa at one-fifth to the dorsum at about one-quarter continued along the dorsum to the middle. There are also three or four apical spots, sometimes confluent into two, as well as a small reddish-ochreous or ferruginous patch, beyond the posterior end of the cell, edged above and below with a small spot of ochreous-white. A sharply defined black dot is found in the middle of the patch, sometimes edged with whitish. There is also a black, white-edged dot on the upper edge of the dorsal streak, at about one-quarter from the base of the wing. A similar dot is found in the middle of the wing, resting on the anterior edge of the ferruginous patch. The hindwings are greyish-white.