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Comotechna dentifera is a moth in the Depressariidae family. It was described by Meyrick in 1921. It is found in Brazil and Peru.
The wingspan is 9–10 mm. The forewings are violet-fuscous with an oblique mark from the costa at one-fourth running into a short subcostal longitudinal streak, beneath it whitish-ochreous, preceded and followed by dark fuscous suffusion and with an irregular-edged curved oblique dark fuscous fasciate streak from one-fourth of the dorsum to beneath this, edged with whitish suffusion. A dark fuscous oblique fasciate mediodorsal blotch reaches three-fourths across the wing, edged whitish, the anterior edge sinuate-convex, the posterior concave with a well-marked triangular projection in the middle. There is an ochreous-orange very oblique striga from the middle of the costa, preceded and followed by fine white blackish-edged strigae. There are some variable small dark fuscous spots towards the dorsum beyond this, surrounded by whitish suffusion and an indistinct irregular blue-leaden transverse line is found at three-fourths, followed by a whitish dot on the costa and there is some slight whitish-ochreous marking or suffusion in the disc beyond this. An oblique leaden line is found before the apex, then to the tornus abutting on a whitish terminal line. The hindwings are dark fuscous.