Reductoderces araneosa is a moth of the family Psychidae. It was described by Edward Meyrick in 1914. It is endemic to New Zealand and can be found in the lower part of the South Island. The preferred habitat of R. araneosa is on the edge of native beech forest. The larvae construct a case made from silk, moss and lichens and emerge from it to feed. The female of this species is wingless. The males of this species are on the wing in November and February and have been captured in the early morning.

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