Castanopsis densinervia is a tree in the family Fagaceae. The specific epithet is from the Latin meaning 'dense nerves', referring to the leaf venation.
Description Castanopsis densinervia grows as a tree up to tall with a trunk diameter of up to . The greyish bark is smooth. The coriaceous leaves measure up to long. Its ovoid nuts measure up to long.
Distribution and habitat Castanopsis densinervia is endemic to Borneo. Its habitat is hill dipterocarp to lower montane forests from to elevation.
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