Hygroplasta onyxijuxta is a moth in the family Lecithoceridae. It was described by Chun-Sheng Wu and Kyu-Tek Park in 1998. It is found in Sri Lanka.

The wingspan is about 10 mm.

Etymology The species name is derived from Greek onyx (meaning claw) and juxta., 1998: Taxonomic review of the family Lecithoceridae (Lepidoptera) from Sri Lanka II. The subfamily Torodorinae: Genera Deltoplastis Meyrick, Hygroplasta Meyrick, and Antiochtha Walker. Insecta Koreana 15: 1-22. Full article:

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