Coptoborus ochromactonus Smith & Cognato, 2014

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 ochromactonus Smith & Cognato, 2014 Figure 11J-L, P

Coptoborus ochromactonus Smith & Cognato, 2014 (in Stilwell et al. 2014): 677.

Type material.

Holotype (PUCE), paratypes (MSUC, 18), examined.

New records.

Ecuador: Cotopaxi Prov., Otonga, 79°0.197'W, 0°25.158'S, 1970 m, Á. Barragán (PUCE, 5). Guayas Prov., El Empalme, m5 14, 21.ii.2013, Y. Castro, ex cultivated balsa (MSUC, 1).

Diagnosis.

2.5-2.6 mm (mean = 2.56 mm; n = 5), 2.48-2.63 × as long as wide. This species is distinguished by the elytral apex attenuate and weakly emarginate, declivity distinctly sulcate along interstriae 2, declivital interstriae 2 unarmed, interstriae 1 and 3 armed, declivital striae 1 and 2 parallel on declivital face and widely spaced, and declivital striae 2 punctate. It is most similar to C. busoror and can be further distinguished by the smaller size 2.5-2.6 mm vs. 2.7 mm, and stouter body, 2.5-2.6 × as long as wide vs. 2.7 × as long as wide, stouter pronotum, 1.05-1.1 ×, vs. 1.2 × as long as wide, and distribution west of the Andes vs. east of the Andes.

Similar species.

C. busoror , C. leeloo , C. nudulus , C. pilisoror , C. ripley , C. sororcula , C. spicatus .

Distribution.

Ecuador (Cotopaxi, Guayas, Los Ríos, Santo Domingo de los Tsáchilas).

Biology.

This species has only been collected from balsa, Ochroma pyrimidale ( Malvaceae ), and is a serious pest of balsa in Ecuador. The biology of C. ochromactonus has been studied in detail ( Stilwell et al. 2014; Castro et al. 2019; Martínez et al. 2020).

Figures

Figure 11. Dorsal, lateral, frontal and declivital view of Coptoborus newt holotype, 1.7 mm (A-C, M), C. nudulus, 2.3 - 2.4 mm (D-F, N), C. obtusicornis, 3.0 - 3.4 mm (G-I, O), C. ochromactonus, paratype, 2.5 - 2.6 mm (J-L, P). All photographs by SMS.