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 exilis (Schedl, 1934) comb. nov. Figure 6D-F, N Xyleborus exilis Schedl, 1934: 209. Coptobrus exilis (Schedl): Wood and Bright 1992 : 664 (as a synonym of C. pseudotenuis ) Xyleborus exilis Schedl: Bright 2019 : 293. Type material. Holotype (NHMW), examined. New records. Panama: Panama Prov., [Parque Nacional Soberania ], Pipeline Rd, 9°7.975'N , 79°43.142'W , 174 m, 13.viii.2008, S.M. Smith, A.D. Smith, A.R. Gillogly, PAN 7, ex Cecropia (MSUC, 1); as previous except: Canal Zone, Barro Colorado [Island], 12.V.1980, Henk Wolda (UCDC, 1). Diagnosis. 2.3-2.4 mm (mean = 2.35; n = 2), 3.29-3.43 x as long as wide. This species is distinguished by the elytral apex attenuate and weakly emarginate, declivital interstriae 2 convex, declivital interstriae 1 and 3 denticulate and interstriae 2 unarmed, declivital interstriae 3 with two or three enlarged denticles, denticles slightly larger than remaining interstriae 3 denticles, elytral apex deeply emarginate, and declivity gradual, occupying at least posterior 50% of declivity. Similar species. C. artetenuis , C. pseudotenuis . Distribution. Costa Rica (Puntarenas), Grenada, Panama ( Panama ), Saint Lucia. Biology. This species is only known from Cecropia ( Urticaceae ). Remarks. The status of C. exilis has been surrounded by uncertainty for over 40 years. It has been considered a synonym of C. pseudotenuis ( Wood 1982 ) and a 'probable' synonym of C. pseudotenuis ( Wood 1976 ; Wood and Bright 1992 ). Wood (2007) later treated the species as valid and Bright (2019) returned this species to Xyleborus without discussion. This species belongs in Coptoborus because it shares the characters outlined in the generic diagnosis.