Coptoborus leporinus, 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 leporinus sp. nov. Figure 9J-L, P

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 76, 3 cm diameter twig (MUSM).

Diagnosis.

2.35 mm (n = 1), 3.36 × as long as wide. This species is distinguished by the elytral apex attenuate and strongly emarginate, declivity convex, declivital interstriae 2 denticulate, elytral apex with interstriae 3 and 9 joining, forming a smooth continuous carina that continues submarginally to apex, apex produced, declivital interstriae 3 denticles much larger than those of interstriae 1, and interstriae with short erect bristle-like setae that are at least twice as wide as interstrial width.

Similar species.

C. cracens , C. gracilis .

Description

(female). Holotype 2.35 mm, 3.36 × as long as wide. Body light brown, antennae and legs lighter. Head: epistoma smooth. Frons dull, finely punctate, setose; each puncture bearing a long, erect hair-like seta. Eyes broadly and moderately emarginate. Submentum narrow, triangular, slightly impressed. Antennal scape short and thick, as long as club. Pedicel shorter than funicle. Club circular, flat, type 3; segment 1 corneous, subconvex on anterior face, occupying basal 1/3; segment 2 narrow, transverse, corneous; segments 1 and 2 present on posterior face. Pronotum: 1.3 × as long as wide. In dorsal view long and rounded frontally, type 7, sides parallel in basal 3/4, rounded anteriorly; anterior margin without serrations. In lateral view elongate, disc longer than anterior slope, type 7, summit prominent, on anterior 3/5. Anterior slope with densely spaced, broad fine 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 obliquely costate. Elytra: 2.1 × as long as wide, 1.6 × as long as pronotum. Scutellum small. Elytra attenuate, parallel-sided in basal 62%, then acutely tapered to apex, apex strongly emarginate and apically produced. Disc smooth, shiny; striae minutely punctate, glabrous; interstriae flat, sparsely, minutely punctate, unarmed, glabrous. Declivity gradual, occupying ~2/5 of elytra, smooth, shiny, declivital face convex; striae distinctly impressed, strial punctures larger, deeper than those of disc, each puncture bearing a semi-recumbent seta as long as two punctures; interstriae 2 weakly sulcate, interstriae 1 and 3 each with three and five denticles, respectively, those on interstriae 3 the largest, interstriae 2 with three minute denticles on basal third, interstrial setae erect, thick, bristle-like, uniseriate. Posterolateral margin with interstriae 3 and 9 joining, forming a granulate carina and continuing submarginally to apex. Legs: protibiae obliquely triangular, broadest at apical 1/4; apical 1/2 of outer margin with six large, socketed denticles, their length longer than basal width. Meso- and metatibiae flattened; outer margin evenly rounded with seven and six large, socketed denticles, respectively.

Etymology.

L. leporinus = of hares. In reference to the appearance of rabbit ears when the elytral apex is viewed from a dorsal profile. Adjective.

Distribution.

Peru (Madre de Dios).

Biology.

This species has been collected from a 3 cm diameter twig of an unidentified tree.

Figures

Figure 9. Dorsal, lateral, frontal and declivital view of Coptoborus katniss holotype, 2.7 mm (A-C, M), C. leeloo holotype, 1.6 - 1.7 mm (D-F, N), C. leia holotype, 2.0 mm (G-I, O), C. leporinus holotype, 2.35 mm (J-L, P). All photographs by SMS.