Lepturges (Lepturges) dubius, Monné & Botero & Olivier & Santos-Silva, 2024

Monné, Miguel A., Botero, Juan Pablo, Olivier, Renan Da Silva & Santos-Silva, Antonio, 2024, South American Acanthocinini (Coleoptera, Cerambycidae, Lamiinae): new species, synonymy, description of females, and notes, Zootaxa 5519 (3), pp. 345-383 : 366-370

Lepturges (Lepturges) dubius sp. nov.

( Figs 64–68 )

Description. Holotype male. Integument mostly dark brown; ventral mouthparts dark yellowish brown, except some palpomeres brown with yellowish-brown apex; anteclypeus dark brown close to postclypeus, yellowish brown close to labrum; labrum brown close to anteclypeus, yellowish brown anteriorly; scape and pedicel brown; antennomere III reddish brown except dark brown apex; antennomeres IV–VI dark orangish brown except dark brown apex; antennomere VII dark orangish brown on basal 2/3, dark brown on apical third; antennomeres VIII– XI brown, slightly lighter toward XI. Trochanters and most of femoral peduncles orangish brown; femoral clubs partially brown dorsally; posterocentral 2/3 of abdominal ventrite 5 orangish brown.

Head. Frons densely, finely, shallowly punctate; with abundant pale-yellow pubescence not obscuring integument, more yellowish brown toward median groove, except wide V-shaped dark yellowish-brown pubescent macula from anterior third to antennal tubercles, and glabrous median groove; with one long, erect brown seta close to eyes. Vertex with abundant pale-yellow pubescence partially obscuring integument, pubescence more yellowish brown posteriorly, except glabrous median groove and area close to prothorax, area of median groove widened between antennal tubercles and upper eye lobes. Area behind eyes with dense yellowish-brown pubescence close to eye, glabrous close to prothorax. Genae 0.47 times length of lower eye lobe; with moderately abundant pale-yellow pubescence not obscuring integument, pubescence sparser toward ventral surface, except glabrous apex. Wide central area of postclypeus with abundant pale-yellow pubescence not obscuring integument close to frons and moderately sparse yellowish-white pubescence close to anteclypeus; with one long, erect dark-brown seta on each side. Sides of postclypeus glabrous. Labrum with moderately abundant pale-yellow pubescence not obscuring integument on posterior 2/3, glabrous on anterior third except fringe of yellowish setae on anterior margin; with transverse row of long, erect setae about middle, setae dark brown with pale apex. Antennal tubercles with abundant dark yellowish-brown pubescence not obscuring integument. Distance between upper eye lobes 0.31 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.57 times distance between outer margins of eyes. Antennae 3.6 times elytral length, reaching elytral apex at posterior sixth of antennomere V. Scape and pedicel with abundant yellowish-white not obscuring integument, pubescence yellower or whiter depending on light intensity and source; with a few short, erect, thick blackish setae ventrally near apex.Antennomeres III–XI with moderately abundant whitish pubescence not obscuring integument; with minute, erect whitish setae interspersed throughout; III–IV with short, erect, thick blackish setae ventrally, sparser on IV; V–VIII with a few short setae directed backward on ventral apex. Antennal formula based on length of antennomere III: scape = 1.13; pedicel = 0.14; IV = 0.97; V = 0.93; VI = 0.90; VII = 0.85; VIII = 0.93; IX = 1.03; X = 1.13; XI = 1.55.

Thorax. Prothorax wider than long; anterior constriction narrow, well marked; sides divergent from anterior constriction to lateral tubercles, then convergent to posterolateral angles; lateral tubercle conical, located on posterior fifth, with apex slightly directed backward. Pronotum with slightly elevated, subelliptical gibbosity centrally on posterior half; moderately abundantly and coarsely punctate, except smooth central gibbosity; glabrous close to anterior margin, posterior transverse sulcus, and central gibbosity, with longitudinal, abundant yellowish-white pubescent band centrally on anterior half, not reaching anterior margin, abundant yellowish-white pubescence close to sides of central gibbosity, with large, almost L-shaped white pubescent macula laterally, from apex of anterior third to dorsal surface of lateral tubercles of prothorax and posterolateral angles, with abundant light yellowish-brown pubescence on remaining lateral surface, except large subcircular with both yellowish and whitish pubescence not obscuring integument, remaining central area on anterior 3/4 with abundant dark yellowish-brown pubescence not obscuring integument, and remaining posterior quarter with moderately abundant yellowish pubescence not obscuring integument, except denser pubescence close to posterior sulcus, this later pubescence yellower centrally and whiter laterally. Sides of prothorax with abundant light yellowish-brown pubescence not obscuring integument, except glabrous anterior sulcus and postcoxal process with whitish pubescence. Prosternum with dense white pubescence partially obscuring integument, except glabrous anterior sulcus. Prosternal process ( Fig. 68 ) with abundant white pubescence partially obscuring integument; narrowest area 0.07 times procoxal width. Ventral surface of meso- and metathorax with abundant yellowish-white pubescence laterally and abundant whitish pubescence not obscuring integument centrally. Mesoventral process gradually narrowed toward apex; apex 0.19 times mesocoxal width. Scutellum with sparse yellowish-brown pubescence. Elytra. Parallel-sided on anterior half, then sides convergent toward apex; apex obliquely notched, making outer angle triangularly projected; abundantly, coarsely punctate on anterior half, then gradually finely and sparsely punctate toward apex; dorsal base with dense pale-yellow pubescence toward humerus and dense yellowish-white pubescence toward scutellum; remaining anterior dorsal fifth with abundant brown pubescence not obscuring integument, except white pubescence close to suture and two longitudinal, moderately narrow yellowish-brown pubescent bands; remaining anterior half with abundant white pubescence almost obscuring integument, with abundant, circular brown pubescent spots interspersed, spots anastomosed close to suture, except sides with irregular, wide, longitudinal brown pubescent band; posterior dorsal half with abundant grayish-white pubescence partially obscuring integument, with abundant, circular brown pubescent spots interspersed, except large, irregular brown pubescent macula close to middle of elytra, and another smaller, irregular brown pubescent macula near apex; sides with moderately abundant brown pubescence on anterior 2/3, except whitish pubescent maculae close to dorsal surface between anterior fifth and middle of elytra and whitish pubescent band after middle, between dorsal surface and epipleural margin; remaining lateral surface mostly with grayish-white pubescence with irregular brownish pubescent areas interspersed. Legs. Femora with abundant yellowish-white pubescence not obscuring integument, pubescence yellower depending on light intensity and source. Tibiae with abundant white pubescence dorsally and laterally, except apex of mesotibiae with dark-brown pubescence; ventral surface of protibia with sparse white pubescence on basal third, abundant, bristly dark-brown pubescence on apical quarter, and subglabrous on remaining surface; ventral surface of meso- and metatibiae with abundant light yellowish-brown pubescence not obscuring integument, pubescence gradually darker and bristly from middle; dorsal sulcus on mesotibiae with dense, short, erect, thick dark-brown setae, and remaining apical surface with moderately sparse, similar setae; apical half of dorsal surface of metatibiae with abundant, thick, short, erect blackish setae; apical half of ventral surface of meso- and metatibiae with sparse, short, erect brown setae. Dorsal surface of tarsomeres with moderately abundant whitish pubescence not obscuring integument, pubescence distinctly sparser on tarsomeres V. Metatarsomere I 1.6 times longer than II–III together.

Abdomen. Ventrites with abundant whitish pubescence not obscuring integument; apex of ventrite 5 subtruncate.

Dimensions (mm). Total length, 5.50; prothoracic length, 1.05; anterior prothoracic width, 1.15; prothoracic width close to anterior constriction, 1.35; posterior prothoracic width, 1.50; maximum prothoracic width, 1.85; humeral width, 2.00; elytral length, 3.90.

Type material. Holotype male from BOLIVIA, Santa Cruz: 5 km SSE Buena Vista, Hotel Flora & Fauna , MV/ UV light, 17°29’96”S 63°39’13”W, 440 m, 30.XI.2004, Robin Clarke Gemuseus leg. ( MNKM).

Etymology. Latin, “dubius ” (doubtful; in doubt); alluding to the provisional inclusion of the species in Lepturges (Lepturges) .

Remarks. We believe that L. (L.) dubius sp. nov. is not a true Lepturges (Lepturges) . However, without a complete revision of the genus, as well as nearby genera, it is not possible to establish the correct allocation of the new species. Therefore, the new species is provisionally included in Lepturges (Lepturges) .

Lepturges (Lepturges) dubius sp. nov. is similar to L. (L.) elimata Monné, 1976 (see photograph on Bezark 2024 and original description), especially by the pronotal pubescent pattern, but differs as follows: prothorax abruptly narrowed after lateral tubercles; and white and grayish-white elytral pubescence with rounded brown pubescent spots interspersed. In L. (L.) elimata , the prothorax is gradually narrowed from lateral tubercles, making them almost located on posterolateral angles, and the whitish elytral pubescence does not have rounded dark pubescent spots interspersed.

Figures

FIGURES 64–68. Lepturges (Lepturges) dubius sp. nov., holotype male. 64) Dorsal habitus; 65) Lateral habitus; 66) Ventral habitus; 67) Head, frontal view; 68) Prosternal and mesoventral processes.