Trigonopterus delapan is a species of flightless weevil in the genus Trigonopterus from Indonesia.
Etymology The specific name is derived the Indonesian word for "eight".
Description Individuals measure 2.04–2.08 mm in length. Body shape is slightly ovate. General coloration is black, with rust-colored tarsi and antennae.
Range The species is found at an elevation of in Labuan Bajo on the island of Flores, part of the Indonesian province of East Nusa Tenggara.
Phylogeny T. delapan is part of the T. saltator species group.
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