A revision of the Neotropical genus Coptoborus Hopkins (Coleoptera, Curculionidae, Scolytinae, Xyleborini) Author Smith, Sarah M. https://orcid.org/0000-0002-5173-3736 Department of Entomology, Michigan State University, 288 Farm Lane, East Lansing, Michigan 48824, USA camptocerus@gmail.com Author Cognato, Anthony I. Department of Entomology, Michigan State University, 288 Farm Lane, East Lansing, Michigan 48824, USA text ZooKeys 2021 2021-06-16 1044 609 720 http://dx.doi.org/10.3897/zookeys.144.62246 journal article http://dx.doi.org/10.3897/zookeys.144.62246 1313-2970-1044-609 66F01A49D32448A8AC2669BF3374894C C96ED07B505A52A8ADA354E1F70BB7C0 Coptoborus silviasilasi Atkinson, 2018 Figure 16A-C, L Coptoborus silviasilasi Atkinson, 2018: 345. Type material. Paratypes (MSUC, 2), examined. New records. None. Diagnosis. 3.0 mm (mean = 3.0 mm; n = 2), 2.5 x as long as wide. This species is distinguished by the declivity broadly and deeply sulcate between interstriae 3, declivital interstriae 1 with a large digitate projection, its length ~2 x basal diameter, and a large digitate projection at the middle of the declivity on interstriae 3, and dark brown to black color. Similar species. None. Distribution. Mexico (Oaxaca). Biology. Atkinson (2018) reported collecting the species from an unidentified branch 2-5 cm in diameter in a coffee plantation. Figure 16. Dorsal, lateral, frontal and declivital view of Coptoborus silviasilasi paratype, 3.0 mm ( A-C, L ), C. solitariformis lectotype, 1.9 mm ( D, E, M ), C. sororcula holotype, 2.2 mm ( F-H, N ), C. spicatus paratype, 2.2 mm ( I-K, O ). All photographs by SMS.