Coptoborus yar, 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 yar sp. nov. Figure 19G-I, L

Type material.

Holotype, female, Ecuador: Fco. Orellana, P.N. Yasuní, 00°40'32"S, 76°21'19"W, 250 m, 19.ii.2005, I. Rodríguez (PUCE). Paratype, female, as holotype except: Tiputini Biodiversity Station, 00°38.189'S, 76°08.965'W, 223 m, 3-9.VI.2011, S.M. Smith (MSUC, 1).

Diagnosis.

2.8-2.9 mm (mean = 2.85 mm; n = 2), 2.8-2.9 × as long as wide. This species is distinguished by the elytral apex strongly acuminate, declivital interstriae 2 granulate near apex, declivity rounded, with a very short carina on posterolateral margin extending from apex to interstriae 2, and elytral discal interstriae 2 with two rows of confused punctures.

Similar species.

C. attenuatus , C. bellus , C. katniss , C. sagitticauda , C. sarahconnor , C. sicula .

Description

(female). 2.8-2.9 mm (mean = 2.85 mm; n = 2), 2.8-2.9 × as long as wide (holotype 2.8 mm, 2.8 × as long as wide). Body, antennae and legs light brown. Head: epistoma tuberculate. Frons dull, finely punctate, setose; each puncture bearing a long, erect hair-like seta. Eyes narrowly and moderately emarginate. Submentum large, triangular, deeply impressed. Antennal scape regularly thick, shorter than club. Pedicel shorter than funicle. Club longer than wide, flat, type 4; segment 1 corneous, transverse on anterior face, occupying basal ~1/4; segment 2 narrow, subconvex, corneous; segments 1 and 2 present on posterior face. Pronotum: 1.0-1.2 × as long as wide. In dorsal view long and rounded frontally, type 7, sides parallel in basal 3/4, rounded anteriorly, abundantly covered with long hair-like setae; anterior margin with/out 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 strongly shiny with sparse, minute punctures, some longer hair-like setae at margins. Lateral margins obliquely costate. Elytra: 1.8 × as long as wide, 1.8 × as long as pronotum. Scutellum minute. Elytra attenuate, parallel-sided in basal 2/3, then acutely narrowed to acuminate apex. Disc smooth, shiny; strial punctures large, shallow, glabrous; interstriae flat, minutely, densely punctate, unarmed, interstriae 2 with two rows of confused punctures, each puncture bearing a long semi-recumbent seta. Declivity gradually rounded, occupying ~2/5 of elytra, smooth, shiny, declivital face strongly convex; striae not impressed, strial punctures larger, deeper than those of disc, each puncture bearing a semi-recumbent seta as long as two punctures; interstriae flat, minutely granulate, granules becoming denser towards apex, interstriae 1-7 each with a row of moderately long thick erect setae, as long as the width of interstriae 1; interstriae 1 with an additional row of slightly shorter erect hair-like setae. Posterolateral margin with a very short carina extending from apex to interstriae 2. 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 nine and ten large, socketed denticles, respectively.

Etymology.

Portrayed by Denise Crosby, Tasha Yar is a heroine in the first season of 'Star Trek: The Next Generation’ (1987). Noun in apposition.

Distribution.

Ecuador (Orellana).

Biology.

Unknown.

Figures

Figure 19. Dorsal, lateral, frontal and declivital view of Coptoborus villosulus, 1.7 - 2.2 mm (A-C, J), C. vrataski holotype, 3.2 mm (D-F, K), C. yar holotype, 2.8 - 2.9 mm (G-I, L). All photographs by SMS.