Coptoborus sororcula, 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 sororcula sp. nov. Figure 16F-H, N

Type material.

Holotype, female, Peru: Madre de Dios Dept., Los Amigos Biological Station, CM2, 12.4492°S, 70.2517°W, Smith, Hulcr, 17-18.v.2008, sample Peru 75, 3 cm diameter twig (MUSM).

Diagnosis.

2.2 mm (n = 1), 2.75 × as long as wide. This species is distinguished by the elytral apex attenuate and weakly emarginate, declivity feebly sulcate along interstriae 2, declivital interstriae 1-3 unarmed, declivity glabrous, declivital interstriae 3 feebly elevated, and declivity shagreened, dull.

Similar species.

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

Description

(female). Holotype 2.2 mm, 2.75 × as long as wide. Body 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 moderately emarginate. Antennal scape short and thick. Pronotum: 1.1 × as long as wide. In dorsal view basic and parallel-sided, type 2, sides parallel in basal 5/7, rounded anteriorly; anterior margin with four serrations, median pair largest. In lateral view elongate, disc longer than anterior slope, type 7, summit prominent, on anterior 3/5. Anterior slope with densely spaced, broad coarse asperities, becoming lower and more strongly transverse towards summit. Disc reticulate, dull with sparse, minute punctures, some longer hair-like setae at margins. Lateral margins carinate on basal third. Elytra: 1.6 × as long as wide, 1.6 × as long as pronotum. Scutellum minute. Elytra attenuate, parallel-sided in basal 62%, then acutely tapered to apex, apex weakly emarginate. Disc smooth, dull; strial punctures moderate, shallow, glabrous; interstriae flat, punctures dense and strongly confused, unarmed, glabrous. Declivity gradual, shagreened, dull, glabrous, appearing bisulcate, occupying apical 2/5 of elytra; striae not impressed, striae 1 and 2 parallel, strial punctures much larger and shallower than those of disc; interstriae impunctate, interstriae 2 feebly sulcate, unarmed; interstriae 1 and 3 feebly costate unarmed. Posterolateral margin with interstriae 3 and 9 joining, forming a serrate acute carina and continuing submarginally to apex. Legs: Mesotibiae flattened; outer margin evenly rounded with six large, socketed denticles.

Etymology.

L. soror = sister, - culus = little. Noun in apposition.

Distribution.

Peru (Madre de Dios).

Biology.

The species was collected from a 3 cm diameter twig of an unidentified host.

Figures

Figure 16. Dorsal, lateral, frontal and declivital view of Coptoborus silviasilasi paratype, 3.0 mm (A-C, L), C. solitariformis lectotype, 1.9 mm (D, E, M), C. sororcula holotype, 2.2 mm (F-H, N), C. spicatus paratype, 2.2 mm (I-K, O). All photographs by SMS.