Coptoborus exilis (Schedl, 1934) Smith & Cognato, 2021

Smith, Sarah M. & Cognato, Anthony I., 2021, A revision of the Neotropical genus Coptoborus Hopkins (Coleoptera, Curculionidae, Scolytinae, Xyleborini), ZooKeys 1044, pp. 609-720 : 609

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: Panamá Prov., [Parque Nacional Soberanía], 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 × 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 ( Panamá), 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.

Figures

Figure 6. Dorsal, lateral, frontal and declivital view of Coptoborus erwini holotype, 1.4 - 1.5 mm (A-C, M), C. exilis 2.3 - 2.4 mm (D-F, N), C. exutus holotype, 1.9 mm (G-I, O), C. furiosa holotype, 2.1 - 2.2 mm (J-L, P). All photographs by SMS, G-I, O copyright National Museum of Natural History, Smithsonian Institution, Washington, D. C., published by permission.