Coptoborus semicostatus (Schedl, 1948) 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 semicostatus (Schedl, 1948) comb. nov. Figure 15G-I, O

Xyleborus semicostatus Schedl, 1948: 268.

Dryocoetoides semicostatus (Schedl): Wood and Bright 1992: 658.

Type material.

Holotype (NHMW), examined.

New records.

Bolivia: Santa Cruz Dist., Portrerillo del Guenda, Preserva Natural, 17°40'S, 63°27'W, 370 m, 12-13.x.2007, A.R. Cline & J.E. Wappes, ex BL/MV (CSCA, 2).

Diagnosis.

2.8-3.1 mm (mean = 3.0 mm; n = 3), 2.6-2.7 × as long as wide. This species is distinguished by the declivital interstriae raised into vermiculate ridges as high as 2 × strial width, declivity subshiny and smaller size, 3.1 mm.

Similar species.

C. starbuck , Dryocoetoides spp.

Distribution.

Bolivia* (Santa Cruz), Brazil (Mato Grosso do Sul).

Biology.

Unknown.

Remarks.

The species was undoubtedly placed in Dryocoetoides by Wood and Bright (1992) because of its costate interstriae, a usually diagnostic character for Dryocoetoides combined with an inflated and granulate posterior face of the protibia. However, the only previously known specimen, the holotype, is point mounted with an excessive amount of glue making it impossible to properly see the protibia. The protibiae are clearly visible on the Bolivian specimens and the posterior face is flat and unarmed. This species is therefore transferred to Coptoborus .

Figures

Figure 15. Dorsal, lateral, frontal and declivital view of Coptoborus schulzi, 2.3 mm (A-C, M), C. scully paratype, 1.7 - 2.0 mm (D-F, N), C. semicostatus 2.8 - 3.1 mm (G-I, O), C. sicula holotype, 2.1 mm (J-L, P). All photographs by SMS.