Abstract
Based on recent fieldwork, the hyperdiverse weevil genus Trigonopterus Fauvel is recorded for the first time from the Indonesian Tanimbar Archipelago, halfway between Australia and Western New Guinea. All seven species discovered on Tanimbar are new to science, and described here: Trigonopterus atufsp. nov., T. kumbangsp. nov., T. laratensissp. nov., T. porgsp. nov., T. selaruensissp. nov., T. tanimbarensissp. nov., and T. triradiatussp. nov. The new species are authored by the taxonomists-in-charge, Raden Pramesa Narakusumo and Alexander Riedel. This fauna appears discordant and established by relatively recent dispersal from New Guinea and other Moluccan islands.
Highlights
Trigonopterus Fauvel is a genus of hidden snout weevils (Cryptorhynchinae) (AlonsoZarazaga and Lyal 1999; Riedel et al 2016)
Trigonopterus had hitherto been recorded from Ceram Island (Riedel 2011), Flores of the Lesser Sunda Islands (Riedel et al 2014), the Aru Islands (Pascoe 1885), Eastern Australia (Riedel and Tänzler 2016), and New Guinea (Riedel 2011, Riedel et al 2013b)
The newly discovered Trigonopterus fauna of the Tanimbar Islands fills a gap in the known distribution and is of special interest due to the isolated position and recent geological age of these islands
Summary
Trigonopterus Fauvel is a genus of hidden snout weevils (Cryptorhynchinae) (AlonsoZarazaga and Lyal 1999; Riedel et al 2016). These beetles are flightless, yet the 444 species currently known cover a large geographic area, across the Indo-Australian Ar-. Raden Pramesa Narakusumo et al / ZooKeys 888: 75–93 (2019). Chipelago and into Oceania (Riedel et al 2010, 2014; Riedel and Tänzler 2016; van Dam et al 2016). Hundreds of additional species await discovery (Riedel et al 2013b, 2014; Riedel and Tänzler 2016; Riedel and Narakusumo 2019; https://species-id.net/ wiki/Trigonopterus; unpublished data). New Guinea is the center of Trigonopterus diversity (Tänzler et al 2012, 2016, 2017)
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