Coptoborus papillicauda, 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 papillicauda sp. nov. Figure 12G-I, O

Type material.

Holotype, female, Suriname: Sipaliwini, 2.977312°N, 55.38500°W, 200 m, Camp 4 (low), Kasikasima, T. Larsen, 20-25.iii.2012, FIT, SR12-0320-TN1, 2012 CI-RAP survey (NZCS).

Diagnosis.

2.0 mm (n = 1), 3.33 × as long as wide. This species is distinguished by the elytral apex attenuate and entire, declivital interstriae 2 convex, declivital interstriae 1 and 3 denticulate and interstriae 2 unarmed, declivital subapical margin armed with three denticles, and declivital interstriae 1 denticles large, 1-2 × high as wide.

Similar species.

C. chica .

Description

(female). 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 large, triangular, deeply impressed. Antennal scape short and thick, much shorter than club. Pedicel shorter than funicle. Club circular, flat, type 3; segment 1 corneous, weakly convex on anterior face, occupying basal ~2/5; 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 4/5, rounded anteriorly; anterior margin without serrations. In lateral view elongate, disc longer than anterior slope, type 7, summit prominent, on anterior 3/4. 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 × as long as wide, 1.5 × as long as pronotum. Scutellum minute. Elytra attenuate, parallel-sided in basal 3/4, then acutely rounded to apex, apex entire. Disc smooth, shiny; striae minutely punctate, glabrous; interstriae flat, sparsely, minutely punctate, unarmed, each puncture bearing a long, erect seta. Declivity gradually rounded, occupying ~1/3 of elytra, smooth, shiny, declivital face weakly convex; striae very shallowly impressed, strial punctures larger, deeper than those of disc, glabrous; striae 1 irregular, slightly laterally broadened from base to declivital midpoint and then narrowing towards apex; interstriae flat, interstriae 1 and 3 each with three large denticles, interstriae 2 unarmed, those of interstriae 1 and 3 subequal, 1-2 × high as wide, interstriae with a sparse row of erect bristle-like setae. Posterolateral margin with interstriae 3 and 9 joining, forming a feebly carina armed with three large, acute denticles and continuing submarginally to apex. Legs: protibiae obliquely triangular, broadest at apical 1/5; 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 eight and seven large, socketed denticles, respectively.

Etymology.

L. papilla = rounded protuberance of the body, cauda = tail. In reference to the appearance of papillae (granules) on the declivity. Noun in apposition.

Distribution.

Suriname.

Biology.

Unknown.

Figures

Figure 12. Dorsal, lateral, frontal and declivital view of Coptoborus osbornae holotype, 1.5 - 1.7 mm (A-C, M), C. panosus holotype, 2.4 mm (D-F, N), C. papillicauda holotype, 2.0 mm (G-I, O), C. paurus holotype, 1.7 mm (J-L, P). All photographs by SMS, except J-L, P copyright National Museum of Natural History, Smithsonian Institution, Washington, D. C., published by permission.