Trigonopterus duabelas is a species of flightless weevil in the genus Trigonopterus from Indonesia.
Etymology The specific name is derived from the Indonesian word for "twelve".
Description Individuals measure 2.2–2.8 mm in length. General coloration is black, with rust-colored tarsi and antennae. The entire legs are rust-colored in the Mount Slamet population.
Range The species is found around elevations of on the Dieng Plateau and Mount Slapet in the Indonesian province of Central Java.
Phylogeny T. duabelas is part of the T. dimorphus species group.
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