Synopsis of the Neotropical Premnobiina (Coleoptera: Curculonidae: Scolytinae Ipini) with descriptions of new species, new synonymy and keys to species Author Atkinson, Thomas H. 0000-0002-9675-8507 University of Texas Insect Collection, 3001 Lake Austin Blvd., Suite 1.314 Austin, Texas 78702, U. S. A. thatkinson. austin @ gmail. com; https: // orcid. org / 0000 - 0002 - 9675 - 8507 thatkinson.austin@gmail.com Author Flechtmann, Carlos A. H. Department of Plant Protection, FEIS / UNESP, Av. Brasil 56, 15385 - 000, Ilha Solteira SP, Brazil. Author Petrov, Alexander V. Institute of Forest Science, RAS, Sovetskaya St., 21, Uspenskoe, Moscow Region, 143030, Russia. text Zootaxa 2023 2023-02-28 5249 1 69 91 http://dx.doi.org/10.11646/zootaxa.5249.1.4 journal article 10.11646/zootaxa.5249.1.4 1175-5326 7685313 A19BA431-94FE-47A1-9C35-E4BB426ED4DE Genus Premnobius Eichhoff, 1878 Premnobius Eichhoff, 1878: 404 Type species. Premnobius cavipennis Eichhoff, 1878: 404 ; monotypy. Taxonomic comments . Schedl (1957) treated Premnobius as a synonym of Xyleborus Eichhoff. This was disputed by Browne (1962) who restored it as a valid genus and removed it from the Xyleborini. All subsequent authors have treated it as a valid genus, but with different tribal placement. Distribution. There are 22 species known from the Afrotropical region, two of which have been introduced into the Americas ( Wood & Bright 1992 ). There are five Neotropical species, one of which is described here ( Atkinson et al. 2018 ). Biology. Browne (1961) described the biology of Premnobius cavipennis in detail from central Africa. It is a polyphagous ambrosia beetle with males that are flightless, reduced in size, and with a female-biased sex ratio.