Blastobasis dicionis is a moth in the family Blastobasidae. It is found in Costa Rica., 2013: Review of the Blastobasinae of Costa Rica (Lepidoptera: Gelechioidea: Blastobasidae). Zootaxa 3618 (1): 1-223. Review and full article: Its forewings are 5–7 mm long and are brownish-grey intermixed with brownish-grey scales tipped with pale brownish-grey and pale brownish-grey scales.
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