Oia is a genus of Asian dwarf spiders that was first described by J. Wunderlich in 1973.
Species it contains four species: Oia breviprocessia Song & Li, 2010 – China Oia imadatei (Oi, 1964) – Russia, China, Korea, Taiwan, Japan Oia kathmandu Tanasevitch, 2019 – Nepal Oia sororia Wunderlich, 1973 (type) – India, Nepal
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