ABSTRACT: The genus Trigonopterus Fauvel, 1862 is highly diverse in Melanesia, the Moluccas, and the Sunda Islands. Only one species, Trigonopterusfulvicornis (Pascoe, 1885) was so far recorded from Sulawesi. Based on focused field-work the fauna from Sulawesi and nearby islands is here revised. We redescribe T.allotopus Riedel newly recorded for Sulawesi and describe an additional 103 new species: T.abnormis sp. n., T.adspersus sp. n., T.ambangensis sp. n., T.ampanensis sp. n., T.analis sp. n., T.arachnobas sp. n., T.armipes sp. n., T.artemis sp. n., T.asterix sp. n., T.barbipes sp. n., T.bonthainensis sp. n., T.carinirostris sp. n., T.castaneipennis sp. n., T.celebensis sp. n., T.cirripes sp. n., T.collaris sp. n., T.costatulus sp. n., T.curvipes sp. n., T.crenulatus sp. n., T.cricki sp. n., T.dar
