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 incomptus sp. nov. Figure 8A-C, M Type material. Holotype , female, Peru: Madre de Dios Dept., Los Amigos Biological Station, 12°34.9S , 70°6.04W , Smith, Hulcr, 26.iv.-2.v.2008, sample Peru 2, branch (MUSM). Paratypes , female, as holotype except: sample 50a, 9 cm diameter trunk (MUSM); as previous except: CM2, 12.4492°S , 70.2517°W , Smith, Hulcr, 17-18.v.2008, sample Peru 76, 3 cm diameter twig (MSUC, 1; NMNH, 1). Diagnosis. 1.7-1.9 mm (mean = 1.8 mm; n = 4), 2.83-3.17 x as long as wide. This species is distinguished by the elytral apex attenuate and entire, declivital interstriae 1-3 denticulate, interstriae 2 with many fewer denticles than interstriae 1 or 3, declivital striae weakly impressed, antennal club obliquely truncate, type 2, segment 1 occupying basal 1/2, and posterolateral margin of declivity costate, armed with two large denticles. Similar species. C. amplissimus , C. catulus , C. newt , C. scully . Description (female). 1.7-1.9 mm (mean = 1.8 mm; n = 4), 2.83-3.17 x as long as wide ( holotype 1.7 mm, 2.83 x as long as wide). Body light brown, elytra darker, antennae and legs lighter. Head : epistoma smooth. Frons dull, finely punctate, setose; each puncture bearing a long, erect hair-like seta. Eyes narrowly and deeply emarginate. Submentum narrow, triangular, deeply impressed. Antennal scape short and thick, as long as club. Pedicel shorter than funicle. Club circular, obliquely truncate, type 2; segment 1 corneous, transverse on anterior face, occupying basal ~2/5; segment 2 narrow, transverse, corneous; segments 1 and 2 present on posterior face. Pronotum : 1.1-1.2 x as long as wide. In dorsal view long and rounded frontally, type 7, sides parallel in basal 4/5, rounded anteriorly; anterior margin without serrations. In lateral view elongate, disc longer than anterior slope, type 7, summit prominent, on anterior 2/3. Anterior slope with densely spaced, broad fine asperities, becoming lower and more strongly transverse towards summit. Disc dull with sparse, minute punctures, some longer hair-like setae at margins. Lateral margins obliquely costate. Elytra : 1.8-1.9 x as long as wide, 1.8 x as long as pronotum. Scutellum small. Elytra attenuate, parallel-sided in basal 82-83%, then acutely tapered to apex, apex entire. Disc smooth, shiny; striae minutely punctate, glabrous; interstriae flat, sparsely, minutely punctate, unarmed, each puncture bearing a long, erect seta (typically abraded). Declivity steeply rounded, occupying ~1/4 of elytra, smooth, shiny, declivital face weakly convex; striae distinctly impressed, strial punctures larger, deeper than those of disc, glabrous, striae 1 irregular, slightly laterally broadened from base to declivital midpoint and then narrowing towards apex; interstriae flat, interstriae 1 and 3 each with three large denticles, interstriae 2 with two denticles, one at summit and one near apex, those of interstriae 1 and 3 subequal, much larger than those of interstriae 2, interstriae with a sparse row of erect bristle-like setae. Posterolateral margin costate, armed with two large denticles. Legs : protibiae obliquely triangular, broadest at apical 1/3; apical 1/2 of outer margin with six large, socketed denticles, their length longer than basal width. Meso- and metatibiae flattened; outer margin evenly rounded with eight and seven large, socketed denticles, respectively. Etymology. L. incomptus = unadorned. In reference to the sparsely granulate declivity. Adjective. Distribution. Peru (Madre de Dios). Biology. The species has been collected from twigs and a trunk of an unknown tree 3-9 cm diameter. Figure 8. Dorsal, lateral, frontal and declivital view of Coptoborus incomptus holotype, 1.7-1.9 mm ( A-C, M ), C. incultus holotype, 2.3 mm ( D-F, N ), C. inornatus paratype, 1.8 mm ( G-I, O ), C. janeway holotype, 2.0 mm ( J-L, P ). All photographs by SMS except G-I, O by T.H. Atkinson, copyright National Museum of Natural History, Smithsonian Institution, Washington, D.C., published by permission.