Rubroshorea mecistopteryx is a tree in the family Dipterocarpaceae, native to Borneo. It is commonly known, along with several other dipterocarp species, as red meranti.
The species was first described as Shorea mecistopteryx by Henry Nicholas Ridley in 1925. The specific epithet mecistopteryx means 'big wing', referring to the fruit's lobes. In 2022 Peter Shaw Ashton and Jacqueline Heckenhauer placed the species in genus Rubroshorea as R. mecistopteryx.
Description Rubroshorea mecistopteryx grows up to tall, with a trunk diameter of up to . It has buttresses up to tall. The smooth bark later becomes flaking and cracked. The papery leaves are oblong and measure up to long, occasionally long. The inflorescences measure up to long.
Distribution and habitat Rubroshorea mecistopteryx is endemic to Borneo. Its habitat is in coastal lowland dipterocarp forests to elevations of around .
Conservation Rubroshorea mecistopteryx has been assessed as vulnerable on the IUCN Red List. It is threatened by conversion of land for agriculture, mainly for palm oil plantations. The species is also threatened by logging for its timber and the construction of logging roads. In Kalimantan, forest fires are a risk for the species. Rubroshorea mecistopteryx does occur in a number of protected areas.
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