Coptoborus martinezae, 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 martinezae sp. nov. Figure 10D-F, N

Type material.

Holotype, female, Ecuador: Los Ríos, Canton La Clementina, Samama Nature Reserve, 01°38.852'S, 79°19.867'W, 381-430 m, 13-15.v.2015, Cognato, Smith, Osborn, Martinez et al., sample EC 30, ex buttressed tree, 30 cm DBH (PUCE). Paratypes, female, as holotype (MSUC, 1; PUCE, 1); as holotype except: EC 14 (MSUC, 12; NHMUK, 5; NMNH, 5; PUCE, 5); as holotype except: EC 13, ex 4 cm diameter hanging liana (MSUC, 6; NMNH, 5; NHMUK, 5; PUCE, 5); as holotype except: EC 15, ex 7 cm diameter branch from large tree fall (MSUC, 6; NHMH, 3; PUCE, 3); as holotype except: EC 25, ex 2 cm diameter branches along trail (MSUC, 1; PUCE, 1); as holotype except: EC 32, ex 3 cm diameter branches at tree fall (MSUC, 2; PUCE, 1).

Diagnosis.

2.0-2.1 mm (mean = 2.04 mm; n = 5), 3.0-3.5 × 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, and apex not produced.

Similar species.

C. furiosa , C. inornatus , C. janeway , C. tolimanus , C. vasquez .

Description

(female). 2.0-2.1 mm (mean = 2.04 mm; n = 5), 3.0-3.5 × as long as wide (holotype 2.0 mm, 3.33 × as long as wide). Body light brown, elytra darker, antennae and legs lighter. Head: epistoma smooth. Frons subshiny, 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, obliquely truncate, type 2; segment 1 corneous, transverse on anterior face, occupying basal ~2/5; segment 2 narrow, transverse, corneous; segments 1 and 2 present on posterior face. Pronotum: 1.1-1.3 × as long as wide. In dorsal view long and rounded frontally, type 7, sides parallel in basal 2/3, rounded anteriorly; anterior margin without serrations. In lateral view elongate, disc as long as anterior slope, type 7, summit prominent. Anterior slope with densely spaced, broad fine asperities, becoming lower and more strongly transverse towards summit. Disc strongly shiny with sparse, minute punctures, some longer hair-like setae at margins. Lateral margins obliquely costate. Elytra: 2.0-2.2 × as long as wide, 1.5 × as long as pronotum. Scutellum small. Elytra attenuate, parallel-sided in basal 64-69%, then acutely tapered to apex, apex strongly emarginate. Disc smooth, shiny; striae minutely punctate, glabrous; interstriae flat, sparsely, minutely punctate, unarmed, each puncture bearing a long, erect seta. Declivity gradual, occupying ~1/3 of elytra, smooth, shiny, declivital face convex; striae not impressed, strial punctures larger, deeper than those of disc, each puncture bearing a recumbent seta as long as two punctures; interstriae flat, interstriae sparsely denticulate along their entire lengths, interstriae 1 and 3 much larger than those of interstriae 2, 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 1/3; 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 large, socketed denticles.

Etymology.

In recognition of Dr. Malena Martinez’s collaboration in the study of xyleborines and their symbiotic fungi. Noun in genitive.

Distribution.

Ecuador (Los Ríos).

Biology.

The species was found in 2-30 cm diameter branches of unidentified trees.

Figures

Figure 10. Dorsal, lateral, frontal and declivital view of Coptoborus magnus holotype, 3.1 mm (A-C, M), C. martinezae holotype, 2.0 - 2.1 mm (D-F, N), C. micarius, 2.0 - 2.4 mm (G-I, O), C. murinus holotype, 2.2 mm (J-L, P). All photographs by SMS except (A-C, M) by A. V. Petrov.