Gorybia clarkeorum Wappes, Botero and Santos-Silva, 2019

Wappes, James E., Botero, Juan Pablo & Santos-Silva, Antonio, 2019, New species and taxonomical notes in Gorybia Pascoe, 1866 (Coleoptera: Cerambycidae: Cerambycinae), Insecta Mundi 691, pp. 1-16 : 6-8

Gorybia clarkeorum Wappes, Botero and Santos-Silva , new species

( Fig. 15–19 )

Description. Female. Integument orangish-brown, lighter in some areas, darker in others. Setae and pubescence yellowish-white, appearing to be white or whitish depending on light intensity.

Head. Frons, vertex, and area behind upper eye lobes coarsely reticulate (distinctly less so between antennal tubercles and upper eye lobes), with reticules and area inside them minutely, densely asperate; with very short, sparse, decumbent setae, interspersed with long, erect, nearly scale-shaped setae from area between antennal tubercles and close to lower eye lobes (absent on area close to prothoracic margin), and a few long, suberect, slender setae also from antennal tubercles. Area behind lower eye lobes densely micropunctate interspersed with moderately coarse, very shallow punctures; with a few long, erect, nearly scale-shaped setae close to eye, glabrous on remaining surface. Genae minutely, densely punctate, becoming somewhat asperate; with very short and sparse, decumbent setae. Antennal tubercles moderately elevated, in frontal view, with apex acute; with sculpturing as on frons frontally, nearly smooth posteriorly, smooth on distal area; with very short, sparse, decumbent setae, except glabrous distal area. Median groove distinct only between antennal tubercles and anterior margin of upper eye lobes. Gulamentum smooth, glabrous on posterior 2/3; in anterior third, slightly depressed, densely micropunctate, with short, sparse, bristly setae, interspersed with a few long, erect, slender setae laterally, and one long, erect, nearly scale-shaped seta close to each eye. Postclypeus densely micropunctate, except smooth apex of sides; with short, suberect, very sparse setae on wide central area, glabrous laterally. Labrum coplanar with anteclypeus at about posterior third, inclined at anterior 2/3; with long, erect, thick setae laterally, and a few long, slender setae on anterocentral area. Distance between upper eye lobes 0.94 times length of scape; in frontal view, distance between lower eye lobes 1.26 times length of scape. Antennae 1.5 times elytral length, reaching elytral apex slightly after midlength of antennomere XI. Scape short, with central diameter almost twice basal and distal diameters; coarsely, shallowly, confluently punctate, and densely micropunctate (becoming slightly rugose); with very short, sparse, decumbent setae, interspersed with long, erect, nearly scale-shaped setae. Pedicel with setae as on scape. Antennomeres III–X with very short setae dorsally and ventrally on outer side, gradually denser toward X dorsally; antennomeres III–IV with long, erect, sparse, nearly scale-shaped setae throughout; antennomeres V–X with long, erect, slender, sparse setae distally; outer side of antennomeres III–X carina-shaped, gradually widened toward moderately acute apex (more distinctly from V); antennomere XI with very short, decumbent setae, more abundant toward apex. Antennal formula (ratio) based on length of antennomere III: scape = 0.77; pedicel = 0.24; IV = 0.92; V = 0.97; VI = 0.89; VII = 0.83; VIII = 0.67; IX = 0.67; X = 0.67; XI = 0.95.

Thorax. Prothorax longer than wide; anterior 2/3 nearly parallel-sided (slightly tumid just after midlength), except convergent area close to anterior margin, strongly constricted from this point toward posterior ninth. Pronotum slightly longitudinally sulcate from anterior third to near apex; sides coarsely reticulate, with reticules and area inside them densely micropunctate; longitudinal central area subsmooth, especially on posterior half; with very short, sparse, decumbent setae, interspersed with long, erect, nearly scale-shaped setae (absent along longitudinal central area). Sides of prothorax with sculpturing and setae as on sides of pronotum, gradually less so toward prosternum. Prosternum densely micropunctate, interspersed with coarse, very shallow punctures; with short, sparse, nearly decumbent setae. Apex of prosternal process with central, wide, rounded lobe. Ventral surface of meso- and metathorax with short, decumbent setae, denser on mesanepisternum, mesepimeron and metanepisternum. Scutellum glabrous. Elytra. Coarsely, abundantly punctate; with minute setae emerging from punctures, except some punctures with long, erect, nearly scale-shaped setae; apex with long spine at outer angle, nearly truncate toward sutural angle. Legs. Femora strongly pedunculate-clavate; peduncle of metafemora moderately arched; with long, erect, sparse, nearly scale-shaped setae (more abundant and more scaleshaped on femoral club). Tibiae with very short, decumbent, moderately sparse setae interspersed with long, erect, nearly scale-shaped setae dorsally and laterally, and yellowish-brown pubescence on distal half of ventral surface; metatibiae moderately widened toward apex; in side view, apex projected superiorly.

Abdomen. Ventrites with short, decumbent, sparse setae (slightly, gradually more abundant toward V), interspersed with long, erect, slender setae; apex of ventrite V rounded.

Dimensions (mm). Total length, 6.45; prothoracic length, 1.25; anterior prothoracic width, 0.90; posterior prothoracic width, 0.95; maximum prothoracic width, 1.10; humeral width, 1.40; elytral length, 4.35.

Type material. Holotype female from BOLIVIA, Santa Cruz: 5 km SSE Buena Vista (17°29′96″S / 63°39′13″W; 440 m; Flora & Fauna Hotel), 21.II.2004, R. Clarke col. ( FSCA, previously in ACMT).

Remarks. Following the key from Martins (2003), Gorybia clarkeorum sp. nov. can be included in the alternative of couplet “9” (translated; modified; considering the opaque elytra as being microsculptured):

9(8). Prothorax distinctly rounded laterally; pronotum not reticulate. Brazil (Pernambuco)......

.................................................... G. minima Martins, 1976 — Prothorax not distinctly rounded laterally, more parallel-sided anteriorly; pronotum reticulate........................................................................... 9 ′ 9′(9). Female with antennomeres wider, not subcylindrical, with outer distal area distinctly projected from basal antennomeres ( Fig. 19 ). Bolivia........................................

....................... G. clarkeorum Wappes, Botero and Santos-Silva , sp. nov.

— Female with antennomeres slender, subcylindrical, with outer distal area not distinctly projected from basal antennomeres ( Fig. 20 ). Brazil (Minas Gerais, Espírito Santo, Rio de Janeiro, São Paulo), Paraguay.................................... G. apatheia Martins, 1976

Following the key from Galileo and Martins (2013) the new species can be included in the alternative of couplet “2” (translated)

2′(1). Elytra opaque, not microsculptured. Bolivia.........................................

...................... G. clarkeorum Wappes, Botero and Santos-Silva , sp. nov. — Elytra microsculptured, at least on anterior half.................................... 2

Gorybia clarkeorum sp. nov. is similar to G. apatheia, Martins, 1976 , especially specimens of the latter without dark fascia or other markings on elytra, but differs by the antennomeres in female being wider, not subcylindrical and more distinctly widened toward apex including in basal segments. In female of G. apatheia , the antennomeres are slender, subcylindrical, and not distinctly widened toward apex in basal antennomeres.

Etymology. Named for Robin O. S. Clarke (collector of the holotype) and his spouse, Sonia who have collected more than 900 cerambycidae species from his Flora and Fauna hotel property near Buena Vista, Santa Cruz Department, Bolivia, many of which have been species new to science.

Figures

Figures 15–20. 15–19) Gorybia clarkeorum new species, holotype female. 15) Dorsal habitus. 16) Ventral habitus. 17) Lateral habitus. 18) Head, frontal view. 19) Antenna. 20) G. apatheia, paratype female, antenna.