''Kainonychus'' is a genus of harvestman in the family

Paranonychidae Paranonychidae is a family of armoured harvestmen in the order Opiliones The Opiliones (formerly Phalangida) are an order of arachnids colloquially known as harvestmen, harvesters, harvest spiders, or daddy longlegs. , over 6,650 species of ...

. There is one described species in ''Kainonychus'', ''K. akamai'', endemic to Japan.

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