Dialectica japonica is a moth of the family Gracillariidae. It is known from Kyūshū, Japan.Global Taxonomic Database of Gracillariidae (Lepidoptera)
The wingspan is 7.5–8.6 mm.Japanese species of the Acrocercops-group (Lepidoptera: Gracillariidae). Part I
The larvae feed on Ehretia ovalifolia. They mine the leaves of their host plant.
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