Coptoborus capillisoror, 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 capillisoror sp. nov. Figure 3G-I, O

Type material.

Holotype, female, Brazil: Bahia, Camacan, Serra Bonita Reserve, 15°23.429'S, 39°33.810'W, 700-100 m, 6-14.V.2013, AI Cognato, SM Smith, CAH Flechtmann, #115, ex Tibouchina , DNA voucher Theo.sp1 (MZUSP).

Diagnosis.

2.3 mm (n = 1), 2.88 × as long as wide. This species is distinguished by the elytral apex attenuate and entire and not produced, declivity interstriae 2 feebly sulcate, declivital interstriae 1- 3 denticulate, denticles on interstriae 1 and 3 small and relatively indistinct, interstriae 1 unarmed on apical quarter, posterolateral margin of declivity with interstriae 3 and 9 joining, forming a carina and continuing submarginally to apex, stout form, and declivital interstriae and striae densely covered with abundant hair-like setae, setae becoming thicker from base to apex.

Similar species.

C. barbicauda , C. bettysmithae , C. hansen , C. schulzi , C. subtilis , C. trinity , C. uhura .

Description

(female). Holotype 2.3 mm, 2.88 × 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 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, weakly bisinuate on anterior face, occupying basal ~1/4; segment 2 narrow, weakly bisinuate, corneous; segments 1 and 2 present on posterior face. Pronotum: 1.0 × as long as wide. In dorsal view basic and parallel-sided, type 2, sides parallel in basal 3/4, rounded anteriorly; anterior margin with four projecting serrations, median pair larger. In lateral view tall, type 2, disc flat, summit pronounced, at midpoint. Anterior slope with densely spaced, broad fine asperities, becoming lower and more strongly transverse towards summit. Disc reticulate, subshiny with moderately dense, moderate punctures, some longer hair-like setae at margins. Lateral margins obliquely costate. Elytra: 1.9 × as long as wide, 1.9 × as long as pronotum. Scutellum minute. Elytra attenuate, parallel-sided in basal 2/3, then acutely rounded to apex, apex entire. Disc smooth, shiny; strial punctures large, deep, each bearing a recumbent seta the length of a puncture; interstriae flat, sparsely, minutely punctate, unarmed, each puncture bearing a long fine semi-erect hair-like seta. Declivity gradually rounded, occupying ~1/2 of elytra, shagreened, subshiny, declivital face feebly sulcate; striae distinctly impressed, strial punctures larger, deeper than those of disc, each puncture bearing a semi-recumbent hair-like seta as long as 3-5 punctures; interstriae flat, sparsely and inconsistently denticulate, denticles uniseriate, spaced by at least six widths of a denticle, denticles absent on apical 1/4 of interstriae 1, interstriae 3 denticles faint, setae dense, uniseriate, long, erect, hair-like at the base and gradually increasing in thickness toward apex, 1.5 × as long as interstriae 1 width, interstriae 1 with an additional row of slightly shorter setae. Posterolateral margin with interstriae 3 and 9 joining, forming a feeble carina and continuing submarginally to apex Legs: protibiae obliquely triangular, broadest at apical 1/3; apical 1/2 of outer margin with eight 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.

L. capillosus = hairy soror = sister. In reference to the abundant long setae of the declivity. Noun in apposition.

Distribution.

Brazil (Bahia).

Biology.

This species was collected from Tibouchina ( Melastomataceae ).

Figures

Figure 3. Dorsal, lateral, frontal and declivital view of Coptoborus brigman holotype, 1.8 mm (A-C, M), C. busoror holotype, 2.7 mm (D-F, N), C. capillisoror holotype, 2.3 mm (G-I, O), C. carumbensis holotype, 2.2 mm (J-L, P). All photographs by SMS, J-L, P copyright National Museum of Natural History, Smithsonian Institution, Washington, D. C., published by permission.