Antaeotricha thylacosaris is a species of moth of the family Depressariidae. It is found in Guyana, French Guiana and Brazil."Antaeotricha Zeller, 1854" at Markku Savela's Lepidoptera and Some Other Life Forms
The wingspan is 17–21 mm. The forewings are whitish-fuscous, the extreme costal edge white and the dorsal three-fifths unevenly suffused with brownish. There is a slender dark fuscous longitudinal streak from the base of the costa to one-fourth of the disc and there are three dark fuscous transverse lines from beneath the costal edge, the first from one-fifth of the costa to before the middle of the dorsum, interrupted above and below an oval spot in the disc, becoming a broad suffusion in the dorsal area, the second from before the middle of the costa to three-fourths of the dorsum, curved, rather broadly suffused posteriorly towards the dorsum, the third from three-fourths of the costa to the tornus, rather strongly curved. There are eight blackish marginal marks around the apex and termen, connected by a dark brown line with projections on the veins. The hindwings are ochreous-whitish, the apical half suffused with grey. In males with a long ochreous-whitish hair-pencil enclosed in a subdorsal fold.Exotic Microlepidoptera 1 (14): 419
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