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Antaeotricha trivallata is a moth in the Depressariidae family. It was described by Edward Meyrick in 1934. It is found in Costa Rica.
The wingspan is 18-19 mm. The forewings are white with a grey streak along the basal fourth of the costa and a grey transverse spot in the disc beyond one-fourth, and three or four on the anterior half of the dorsum. There is a transverse spot on the end of the cell, the upper part black and enlarged, the lower grey and narrow, an oblong grey cloud surrounding this above, posteriorly connected by an irregular shade with a dark grey spot on the dorsum at three-fourths. Near beyond this is a slightly excurved grey shade from near the costa to the dorsum and there is a blackish-grey terminal fascia extending over one-fifth of the costa and attenuated to the tornus, the edge slightly concave, including a terminal series of black dots separated and preceded by white suffusion. The hindwings are pale grey.