Gorybia martinsi 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 : 2-4

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

( Fig. 1–4 )

Description. Male. Dorsal surface of head, prothorax, and sutural area of elytra dark brown (the latter widened close to scutellum); ventral surface of head, mouthparts (except palpi) dark reddish-brown; palpi light yellowish brown; scape moderately dark brown; pedicel and antennomeres dark brown except reddish-brown distal area (darkest area slightly lighter toward distal antennomeres); ventral surface of meso- and metathorax mostly dark brown; elytra mostly dark reddish-brown (more dark brown depending on light intensity); legs mostly dark brown, more dark reddish-brown on some areas, especially dorsal surface of femora, except coxae reddish-brown; abdominal ventrite I dark brown, and remaining segments gradually lighter toward V. Some setae are lighter or slightly darker (from yellowish-white to light yellowish-brown depending on light angle and intensity).

Head. Frons finely, moderately asperate-punctate; with abundant, short yellowish-white setae not obscuring integument, interspersed toward vertex with long, scale-shaped light yellowish-brown setae, except glabrous median groove. Area between antennal tubercles and middle of upper eye lobes with sculpturing and setae as on frons; area between posterior half of upper eye lobes with sculpturing and setae as on frons, and punctures somewhat coarser and more distinct; remaining surface of vertex coarsely, abundantly punctate, with both short and very short, visibly sparse yellowish setae. Area behind upper eye lobes with sculpturing moderately asperate-punctate in area close to eye and vertex, coarsely, shallowly, abundantly punctate on remaining surface; with short, decumbent, abundant yellowish setae close to eye (gradually sparser toward lower eye lobe), with very short, sparse yellowish setae on remaining surface. Area behind lower eye lobes shallowly, moderately coarsely, sparsely punctate; with long, erect, pale yellow setae close to eye (gradually longer toward ventral surface), glabrous on remaining surface. Genae with acute apex, projected forward and sideward; with both short and long, yellowish-white setae except glabrous apex. Antennal tubercles with apex moderately elevated and acute; with setae as on frons. Median groove distinct from clypeus to area between upper eye lobes. Gulamentum smooth, glabrous on posterior half, slightly depressed, densely micropunctate, interspersed with coarse, shallow punctures, with both short and long, erect yellowish-white setae. Postclypeus with both, short and long, bristly, moderately sparse yellowish-white setae on wide central area, glabrous laterally. Labrum coplanar with anteclypeus posteriorly inclined anteriorly (wide central area of the latter distinctly concave); with long, erect light yellowish-brown setae laterally on posterior half, and tuft of long light yellowish-brown setae on central area of anterior half (distinctly shorter than on posterior area). Distance between upper eye lobes 0.77 times length of scape; in frontal view, distance between lower eye lobes 1.19 times length of scape. Antennae 1.65 times elytral length, reaching elytral apex at distal third of antennomere X. Scape coarsely, abundantly punctate; with sparse, decumbent yellowish setae interspersed with long, erect, scale-shaped yellowish-white setae. Pedicel finely, sparsely punctate, with sparse yellowish setae on basal half, coarsely, confluently punctate, with long, scale-shaped yellowish-white setae on posterior half. Outer apex of antennomeres III–X acute, projected; antennomeres distinctly carinate; III–IV with both short and long yellowish setae (long setae more abundant ventrally and apically); V–VI with long, erect, sparse yellowish setae ventrally and apically, remaining surface with minute, sparse yellowish setae; VII–X with long erect yellowish setae distally, and minute, sparse yellowish setae on remaining surface; XI with minute, moderately sparse yellowish setae throughout. Antennal formula (ratio) based on length of antennomere III: scape = 0.70; pedicel = 0.22; IV = 0.85; V = 0.82; VI = 0.82; VII = 0.80; VIII = 0.75; IX = 0.75; X = 0.69; XI = 0.84.

Thorax. Prothorax slightly wider than long; sides uniformly rounded from anterior margin to posterior constriction, which is well-marked. Pronotum moderately coarsely, abundantly asperate-punctate except smooth centrobasal posterior quarter; slightly, longitudinally sulcate centrally from anterior fifth to posterior margin; with short, decumbent, moderately abundant light yellowish-brown setae interspersed with long, erect, scale-shape setae of same color. Sides of prothorax with sculpturing as on sides of pronotum on superior area, gradually with punctures sparser toward prosternum; setae as on sides of pronotum on superior area, sparser, yellowish-white, without scale-shaped setae toward prosternum. Prosternum densely micropunctate on posterior third, interspersed with moderately coarse punctures, gradually less so toward middle, finely striate on wide central area of anterior half, sparsely punctate on sides of this area; with short, sparse, decumbent yellowish-white setae interspersed with a few long, erect setae of same color. Ventral surface of meso- and metathorax with short, decumbent, sparse yellowish-white setae. Scutellum with short, moderately abundant yellowish setae not obscuring integument except glabrous sides.

Elytra. Coarsely, moderately abundantly punctate on basal third, gradually slightly finer and sparser toward apex; apex straight truncate; with a short, clearly distinct, decumbent yellowish seta emerging from punctures, except some punctures with long, erect, scale-shaped or nearly so light yellowish-brown seta (erect setae not distinctly aligned in rows). Legs. Femora and tibiae with short, moderately sparse, decumbent yellowish setae interspersed with long, suberect setae of same color; outer apex of metatibiae not projected.

Abdomen. Ventrites finely, sparsely punctate; with short, decumbent, sparse yellowish-white setae interspersed with long, erect setae of same color; apex of ventrite rounded V shaped.

Variation. The only notable difference between the holotype and paratype is the shape of elytral apex: truncate in the holotype, emarginate in the paratype.

Dimensions (mm), holotype / paratype. Total length, 6.20/5.25; prothoracic length, 1.35/1.05; anterior prothoracic width, 1.15/0.95; posterior prothoracic width, 1.10/0.85; maximum prothoracic width, 1.45/1.10; humeral width, 1.65/1.30; elytral length, 4.65/3.70.

Type material. Holotype male from BOLIVIA, Santa Cruz: 4 km N Bermejo (Refugio los Volcanes; 1045–1350 m; 18°06′S / 63°36′W), 7–24. X. 2014, Wappes and Morris col. ( FSCA, formerly in ACMT) . Paratype male, same data as holotype ( ACMT).

Remarks. Gorybia martinsi sp. nov. differs from all other currently recorded species for Bolivia, by the pronotal pubescence moderately abundant, consisting of short, slender and decumbent setae interspersed with long and remarkably thick setae. Additionally, the decumbent short setae of the elytra are conspicuous, while they are absent or barely visible in all other known Bolivian species.

Following the key from Martins (2003), Gorybia martinsi sp. nov. can be included in the alternative of couplet “1” (translated):

1. All the elytral setae with similar shape; when there are setiferous punctures the setae are barely visible.............................................................. 2

— Elytral setae with two different shapes: long, erect, organized in longitudinal rows; and short, decumbent inside each puncture.............................................. 2 ′

2′(1). General color reddish; elytral setae abundant; elytral apex moderately obliquely truncate, with the outer angle somewhat projected ( Fig. 5 ). Brazil (Mato Grosso do Sul)...................................................................... G. pilosa Martins, 1976

— General color dark brown; long, erect elytral setae sparse; elytral apex truncated. Bolivia......................... G. martinsi Wappes, Botero and Santos-Silva , sp. nov.

However, if the short, decumbent elytral setae are considered as slightly conspicuous it may also be included in the alternative of couplet “23” (translated):

23′(22). Pronotum with moderately abundant, decumbent short setae interspersed with long, erect thick setae. Bolivia............. G. martinsi Wappes, Botero and Santos-Silva , sp. nov.

— Pronotum without abundant setae.............................................. 23

23(23′). Elytra uniformly dark brown; base of pronotum elevated with longitudinal, shining (lightreflecting), smooth sulcus; elytral setae organized in 6–7 longitudinal rows ( Fig. 6 ). Brazil (Bahia, Minas Gerais, São Paulo, Rio Grande do Sul)....... G. proxima Martins, 1976

— Anterior half of elytra brownish, gradually reddish toward apex, or elytra entirely reddish; base of pronotum with microsculptured sulcus; elytral setae organized in 9–10 longitudinal rows ( Fig. 7 ). Brazil (Maranhão, Goiás, Mato Grosso, Mato Grosso do Sul, Minas Gerais, São Paulo).......................................... G. ruficauda ( Gounelle, 1909)

Finally, following Galileo and Martins (2013) key for Bolivian Gorybia species it may be included in the alternative of couplet “7” (translated; modified):

7(3). Elytral apex truncated and unarmed............................................. 7 ′ — Elytral apex bispinose or, at least, with outer angle distinctly projected................. 8

7′(7). Pronotum reticulate; pronotal setae visibly sparse; elytral punctures visibly abundant, especially on basal half. Bolivia..................... G. inarmata Galileo and Martins, 2003

— Pronotum not reticulate; pronotal setae moderately abundant; elytral punctures somewhat sparse throughout. Bolivia.. G. martinsi Wappes, Botero and Santos-Silva , sp. nov.

Etymology. Named to honor Ubirajara R. Martins (now deceased), São Paulo, Brazil, for his unparalleled contribution to our knowledge of New World Cerambycidae , including a truly amazing record of new Gorybia species authorship.

Figures

Figures 1–7. 1–4) Gorybia martinsi new species, holotype male. 1) Dorsal habitus. 2) Ventral habitus. 3) Lateral habitus. 4) Head, frontal view. 5) G. pilosa, holotype female, dorsal habitus. 6) G. proxima, holotype male, dorsal habitus. 7) G. ruficaudata, paralectotype female, dorsal habitus.