Blastobasis lygdi 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:
The length of the forewings is 4.2–6.1 mm.
Etymology The specific epithet is derived from Latin lygdos (meaning white marble).
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