Coptoborus chica, 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 chica sp. nov. Figure 4D-F, N

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, declivity 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 small, 0.5-1 × high as wide.

Similar species.

C. papillicauda .

Description

(female). Holotype 2.0 mm, 3.33 × as long as wide. Body, antennae, and legs light brown. Head: epistoma tuberculate. Frons strongly shiny, finely punctate, setose; each puncture bearing a long, erect hair-like seta. Eyes narrowly and deeply emarginate. Submentum narrow, triangular, slightly impressed. Antennal scape regularly thick, shorter than club. Pedicel shorter than funicle. Club circular, flat, type 3; segment 1 corneous, transverse on anterior face, occupying basal ~1/5; 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 dull 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 small. Elytra attenuate, parallel-sided in basal 3/4, then acutely rounded to apex, apex entire. Disc shiny; striae minutely punctate, glabrous; interstriae flat, sparsely, minutely punctate, unarmed, glabrous. 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 small denticles, interstriae 2 unarmed, those of interstriae 1 and 3 subequal, 0.5-1 × 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 small denticles and continuing submarginally to apex. Legs: protibiae obliquely triangular, broadest at apical 1/3; apical 1/2 of outer margin with seven large, socketed denticles, their length longer than basal width. Meso- and metatibiae flattened; outer margin evenly rounded with nine and seven large, socketed denticles, respectively.

Etymology.

Spanish, chica = girl. Noun in apposition.

Distribution.

Suriname.

Biology.

Unknown.

Figures

Figure 4. Dorsal, lateral, frontal and declivital view of Coptoborus catulus 2.2 mm (A-C, M), C. chica holotype, 2.0 mm (D-F, N), C. coartatus 2.7 - 2.9 mm (G-I, O), C. cracens 1.8 - 2.0 mm (J-L, P). All photographs by SMS.