Figure 18 from: Narakusumo RP, Riedel A (2021) Twenty-eight new species of Trigonopterus Fauvel (Coleoptera, Curculionidae) from Central Sulawesi. ZooKeys 1065: 29-79. https://doi.org/10.3897/zookeys.1065.71680 - Narakusumo, Raden Pramesa (2021)